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#! /usr/bin/env python |
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# |
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# Copyright (C) 2015-2016 Rich Lewis <[email protected]> |
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# License: 3-clause BSD |
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""" |
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## skchem.core.bond |
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Defining chemical bonds in scikit-chem. |
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""" |
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import pandas as pd |
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import rdkit.Chem |
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from . import Atom |
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from .base import ChemicalObject, PropertyView, ChemicalObjectView |
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class Bond(rdkit.Chem.rdchem.Bond, ChemicalObject): |
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""" |
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Class representing a chemical bond in scikit-chem. |
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""" |
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@property |
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def props(self): |
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""" PropertyView: rdkit properties of the atom. """ |
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if not hasattr(self, '_props'): |
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self._props = PropertyView(self) |
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return PropertyView(self) |
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@property |
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def order(self): |
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""" int: the order of the bond. """ |
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return self.GetBondTypeAsDouble() |
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@property |
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def atoms(self): |
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""" list[Atom]: list of atoms involved in the bond. """ |
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return [Atom.from_super(self.GetBeginAtom()), Atom.from_super(self.GetEndAtom())] |
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def draw(self): |
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""" str: Draw the bond in ascii. """ |
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return '{}{}{}'.format(self.atoms[0].element, \ |
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'-' if self.order == 1 else self.GetSmarts(), \ |
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self.atoms[1].element) |
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def to_dict(self): |
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""" dict: Convert to a dictionary representation. """ |
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return {"b": self.GetBeginAtomIdx(), "e": self.GetEndAtomIdx(), "o": self.order} |
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def __repr__(self): |
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return '<{klass} type="{bond}" at {address}>'.format(klass=self.__class__.__name__, \ |
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bond=self.draw(), \ |
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address=hex(id(self))) |
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def __str__(self): |
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return self.draw() |
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class BondView(ChemicalObjectView): |
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""" Bond interface wrapper """ |
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def __getitem__(self, index): |
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from .bond import Bond |
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if index >= len(self): |
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raise IndexError('Index {} out of range for molecule with {} bonds.'.format(index, len(self))) |
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else: |
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return Bond.from_super(self.owner.GetBondWithIdx(index)) |
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def __len__(self): |
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return self.owner.GetNumBonds() |
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@property |
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def order(self): |
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return pd.RangeIndex((bond.order for bond in self), index=self.index) |
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@property |
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def index(self): |
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return pd.RangeIndex(len(self), name='bond_idx') |
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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__.py
files in your module folders. Make sure that you place one file in each sub-folder.