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by George
02:01
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import_callable()   A

↳ Parent: Project

Complexity

Conditions 4

Size

Total Lines 17

Duplication

Lines 0
Ratio 0 %

Importance

Changes 2
Bugs 0 Features 1
Metric Value
cc 4
dl 0
loc 17
rs 9.2
c 2
b 0
f 1
1 
# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from functools import wraps

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import importlib

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import os

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import sys

            


            
                                                                                                            
                            
            
                                    
            
            

                
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def add_current_dir_to_syspath(f):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    @wraps(f)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def wrapper(*args, **kwargs):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        current = os.getcwd()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        changed = False

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        if current not in sys.path:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            sys.path.append(current)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            changed = True

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        try:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            return f(*args, **kwargs)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        finally:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            # restore sys.path

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            if changed is True:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                sys.path.remove(current)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    return wrapper

            


            
                                                                                                            
                            
            
                                    
            
            

                
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@add_current_dir_to_syspath

            


            
                                                        
            
                                    
            
            

                
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def import_callable(full_name):

            


            
                                                        
            
                                    
            
            

                
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    package, *name = full_name.rsplit('.', 1)

            


            
                                                        
            
                                    
            
            

                
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    try:

            


            
                                                        
            
                                    
            
            

                
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        module = importlib.import_module(package)

            


            
                                                        
            
                                    
            
            

                
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    except ValueError as exc:

            


            
                                                        
            
                                    
            
            

                
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        raise ImportError('Error trying to import {!r}'.format(full_name)) from exc

            


            
                                                        
            
                                    
            
            

                
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    if name:

            


            
                                                        
            
                                    
            
            

                
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        handler = getattr(module, name[0])

            


            
                                                        
            
                                    
            
            

                
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    else:

            


            
                                                        
            
                                    
            
            

                
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        handler = module

            


            
                                                        
            
                                    
            
            

                
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    if not callable(handler):

            


            
                                                        
            
                                    
            
            

                
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        raise ImportError('{!r} should be callable'.format(full_name))

            


            
                                                        
            
                                    
            
            

                
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    return handler

            


            
                                                        
            
                                    
            
            

                
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