importing / loading a module / class dynamically

laurent rahuel toto at titi.de
Fri Jan 5 22:23:34 CET 2007


Hi,

Using exec or eval ISN'T what should be done ever. When you have 
troubles importing you should :

- Add some repository to your sys.path
and/or
- Use the buildin import method
and/or
- Use Mr Eby's Importing module (http://python.org/pypi/Importing)

Regards,

Laurent

hg a écrit :
> Hi,
> 
> I have the following problem.
> 
> I find in a directory hierarchy some files following a certain sets of
> rules:
> 
> .../.../../plugin/name1/name1.py
> ....
> .../.../../plugin/namen/namen.py
> 
> each file will in turn have a class with the same name as the filename
> (minus .py)
> 
> 
> I fetch those names in a list of string and want to import the files /
> instantiate the classes.
> 
> 
> I block at the beginning and tried this (test.py is a real file)
>>>> s = 'test.py'
>>>> eval ('import ' + s)
> 
> and get 
> 
> Traceback (most recent call last):
>   File "<pyshell#1>", line 1, in -toplevel-
>     eval ('import ' + s)
>   File "<string>", line 1
>     import test.py
> 
> Any clue ?
> 
> Thanks
> 
> hg
> 



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