| 1 |  |  | #! /usr/bin/env python | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  | # | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | # Copyright (C) 2015-2016 Rich Lewis <[email protected]> | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  | # License: 3-clause BSD | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 | 1 |  | """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  | ## skchem.core.base | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  | Define base classes for scikit chem objects | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  | """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 | 1 |  | from abc import ABCMeta, abstractmethod | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 | 1 |  | import warnings | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 | 1 |  | import numpy as np | 
                            
                    |  |  |  | 
                                                                                        
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                | 15 | 1 |  | import pandas as pd | 
                            
                    |  |  |  | 
                                                                                        
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                | 16 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 | 1 |  | class ChemicalObject(object): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |     """ A mixin for each chemical object in scikit-chem """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 | 1 |  |     @classmethod | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |     def from_super(cls, obj): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |         """A method that converts the class of an object of parent class to that of the child. """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 | 1 |  |         obj.__class__ = cls | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 | 1 |  |         return obj | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 | 1 |  | class ChemicalObjectView(object): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |     """ Atom interface wrapper """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 | 1 |  |     def __init__(self, owner): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 | 1 |  |         self.owner = owner | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |     def __iter__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 | 1 |  |         return ChemObjectIterator(self) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 | 1 |  |     def __str__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |         return str(list(str(obj) for obj in self)) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 | 1 |  |     @property | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |     def props(self): | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 | 1 |  |         return MolPropertyView(self) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |     def __repr__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 | 1 |  |         return '<{class_} values="{values}" at {address}>'.format( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |             class_=self.__class__.__name__, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |             values=str(self), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 | 1 |  |             address=hex(id(self))) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  | class ChemObjectIterator(object): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |     """ Atom iterator """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |     def __init__(self, view): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 | 1 |  |         self.view = view | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |         self._current = 0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |         self._high = len(self.view) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 | 1 |  |     def __next__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |         if self._current >= self._high: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |             raise StopIteration | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  |         else: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 | 1 |  |             self._current += 1 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  |             return self.view[self._current - 1] | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  |     # py2 compat | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |     next = __next__ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 | 1 |  | class View(object): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |     """ View wrapper interface """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |     __metaclass__ = ABCMeta | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 | 1 |  |     @abstractmethod | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 | 1 |  |     def keys(self): | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 | 1 |  |         return [] | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 83 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 84 | 1 |  |     def get(self, index, default=None): | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                        
                            
            
                                    
            
            
                | 85 | 1 |  |         if index in self.keys(): | 
            
                                                                        
                            
            
                                    
            
            
                | 86 | 1 |  |             return self[index] | 
            
                                                                        
                            
            
                                    
            
            
                | 87 |  |  |         else: | 
            
                                                                        
                            
            
                                    
            
            
                | 88 | 1 |  |             return default | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |     def pop(self, index, default=None): | 
                            
                    |  |  |  | 
                                                                                        
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                | 91 |  |  |         if default: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 | 1 |  |             val = self.get(index, default) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |         else: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |             val = self[index] | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 | 1 |  |         self.remove(index) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |         return val | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 | 1 |  |     def clear(self): | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |         for idx in self.keys(): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 | 1 |  |             self.remove(idx) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  |     def items(self): | 
                            
                    |  |  |  | 
                                                                                        
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                | 103 |  |  |         return list((k, self[k]) for k in self.keys()) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 | 1 |  |     def remove(self, key): | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 | 1 |  |         self.__delitem__(key) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 | 1 |  |     def __getitem__(self, key): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  |         raise NotImplemented | 
                            
                    |  |  |  | 
                                                                                        
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                | 110 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 | 1 |  |     def __setitem__(self, key, value): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |         raise NotImplemented | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 | 1 |  |     def __delitem__(self, key): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 | 1 |  |         raise NotImplemented | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |     def __iter__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 | 1 |  |         return iter(self.keys()) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 | 1 |  |     def __str__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |         return str(self.to_dict()) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 | 1 |  |     def __len__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  |         return len(self.keys()) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 | 1 |  |     def __repr__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |         return '<{klass} values="{values}" at {address}>'.format( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 | 1 |  |             klass=self.__class__.__name__, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |             values=str(self), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |             address=hex(id(self))) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  |     def to_dict(self): | 
                            
                    |  |  |  | 
                                                                                        
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                | 133 |  |  |         return dict(self) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 |  |  |     def to_series(self): | 
                            
                    |  |  |  | 
                                                                                        
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                | 136 |  |  |         return pd.Series(self.to_dict()) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  | class PropertyView(View): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  |     """ Property object wrapper """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 | 1 |  |     def __init__(self, owner): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 | 1 |  |         self._owner = owner | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 | 1 |  |     def keys(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 |  |  |         return list(k for k in self._owner.GetPropNames() if k[:1] != '_') | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  |     def __getitem__(self, key): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  |         # we manually work out if it was a float that was stored, as GetProp | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  |         # returns floats and ints set by SetDoubleProp and SetIntProp as strings | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 | 1 |  |         value = self._owner.GetProp(str(key)) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  |         try: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  |             return int(value) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  |         except ValueError: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 157 | 1 |  |             try: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 | 1 |  |                 return float(value) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 159 |  |  |             except ValueError: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 | 1 |  |                 return value | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  |     def __setitem__(self, key, value): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  |         if not isinstance(key, str): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  |             warnings.warn("RDKit property keys can only be of type `str`.  Using `{key}` as a `str`.".format(key=key)) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  |             key = str(key) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 168 | 1 |  |         if key[0] == '_': | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 | 1 |  |             warnings.warn("`{value}` is a private RDKit property key. " | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 | 1 |  |                           "Using this may have unintended consequences.".format(value=value)) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 | 1 |  |         if isinstance(value, str): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 173 | 1 |  |             self._owner.SetProp(key, value) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 | 1 |  |         elif isinstance(value, (int, np.int64, np.int32)): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 175 |  |  |             self._owner.SetIntProp(key, value) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 176 | 1 |  |         elif isinstance(value, (float, np.float64, np.float32)): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 177 |  |  |             self._owner.SetDoubleProp(key, value) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 | 1 |  |         else: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 | 1 |  |             warnings.warn("RDKit property keys can only be `str`, `int` or `float`." | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 | 1 |  |                           "Using `{value}` as a `str`.".format(value=value)) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  |             self._owner.SetProp(key, str(value)) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  |     def __delitem__(self, index): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  |         self._owner.ClearProp(index) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 | 1 |  | class MolPropertyView(View): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 | 1 |  |     """ Mol property wrapper """ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  |     def __init__(self, obj_view): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  |         self._obj_view = obj_view | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  |     def keys(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  |         res = set() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 | 1 |  |         for atom in self._obj_view: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 | 1 |  |             res = res.union(set(atom.props.keys())) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  |         return list(res) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 | 1 |  |     def get(self, key, default=None): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  |         return pd.Series((a.props.get(key, default) for a in self._obj_view), index=self._obj_view.index) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  |     def __getitem__(self, key): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 | 1 |  |         if key not in self.keys(): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 | 1 |  |             raise KeyError('No atoms have the property set.') | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  |         return self.get(key, None) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 | 1 |  |     def __setitem__(self, key, value): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 | 1 |  |         if isinstance(value, (pd.Series, dict)): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 | 1 |  |             for idx, val in pd.compat.iteritems(value): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 212 | 1 |  |                 self._obj_view[int(idx)].props[key] = val | 
            
                                                                                                            
                            
            
                                    
            
            
                | 213 |  |  |         else: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 214 | 1 |  |             assert len(self._obj_view) == len(value), "Must pass same number of values as atoms." | 
            
                                                                                                            
                            
            
                                    
            
            
                | 215 | 1 |  |             for atom, val in zip(self._obj_view, value): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 216 |  |  |                 atom.props[key] = val | 
            
                                                                                                            
                            
            
                                    
            
            
                | 217 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 218 | 1 |  |     def __delitem__(self, key): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 219 | 1 |  |         for atom in self._obj_view: | 
            
                                                                                                            
                            
            
                                    
            
            
                | 220 | 1 |  |             atom.props.remove(key) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 221 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 222 | 1 |  |     def to_frame(self): | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 223 | 1 |  |         return pd.DataFrame(dict(self), index=self._obj_view.index) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 224 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 225 | 1 |  |     def to_dict(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 226 |  |  |         return {k: v.tolist() for k, v in pd.compat.iteritems(self)} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 227 | 1 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 228 | 1 |  |     def __str__(self): | 
            
                                                                                                            
                            
            
                                    
            
            
                | 229 | 1 |  |         return str(self.to_dict()) | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 230 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 231 |  |  |  | 
            
                        
This can be caused by one of the following:
1. Missing Dependencies
This error could indicate a configuration issue of Pylint. Make sure that your libraries are available by adding the necessary commands.
2. Missing __init__.py files
This error could also result from missing
__init__.pyfiles in your module folders. Make sure that you place one file in each sub-folder.