__import__ function broken in 2.6

[Dave Angel]

Paul wrote:
> Hi
>
> It seems in 2.6 you are no longer able to use the __import__ function
> with different paths. Here is our code:
>
> 		sys.path = g.origSysPath[:] # copy, not reference
> 		sys.path.insert(0, modulePath)
>
> 		sys.modules = g.origSysModules.copy()
> 		if sys.modules.get(moduleName):
> 			del sys.modules[moduleName]
>
> 		# look for modules in subdirectories
> 		moduleName = "module_"+moduleName+"/"+moduleName
>
> 		module = __import__(moduleName)
>
> Unfortunately, this no longer works in 2.6. Does anyone have any idea
> on how to make it work with file paths?
>
> After quite a lot of searching, I was actually able to find a patch
> that someone made to fix this. Here is the code:
>
> sfepy.googlecode.com/issues/attachment?
> aid=-8587746048072650671&name=import.patch
>
> ---------------------------------------------------------------------------
>
> commit 2e92019ef957b547856e81a144db6845bf95d881
> Author: Robert Cimrman <cimrman3 at ntc.zcu.cz>
> Date:   Thu Mar 5 09:59:59 2009 +0100
>
>     fixed load_classes() for Python 2.6
>
>     - __import__() function does not work when passing a file path as
> name
>
> diff --git a/sfepy/terms/__init__.py b/sfepy/terms/__init__.py
> index 3fab007..34a31a6 100644
> --- a/sfepy/terms/__init__.py
> +++ b/sfepy/terms/__init__.py
> @@ -10,9 +10,9 @@ def load_classes( filenames, is_class ):
>      table = {}
>      for filename in filenames:
>          name = os.path.splitext( filename )[0]
> -#        print filename, name
> -        mod = __import__( name )
> -#        print mod
> +        parts = name.split( os.path.sep )
> +        mod, name = '.'.join( parts ), parts[-1:]
> +        mod = __import__( mod, globals(), locals(), name )
>          for key, var in mod.__dict__.iteritems():
>              if is_class( key ):
>                  table[var.name] = var
>
> ---------------------------------------------------------------------------
>
> However, after a lot of messing around with the new __import__( mod,
> globals(), locals(), name ) function, I am still unable to make it
> work. Perhaps I am just not able to understand exactly what is going
> on here.
>
> Can anyone offer some assistance?
>
> Thank you,
> Paul
>
>   
"No longer works" is pretty vague.  If you get an error, how about 
showing us just what it is.  The following line builds a name with a 
slash in it.  What's the point?  If the module is in a subdirectory, add 
that subdirectory to modulePath.

		moduleName = "module_"+moduleName+"/"+moduleName

DaveA