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2.7 source import in python 3.x

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  2.7 source import in python 3.x Robin Becker <robin@reportlab.com> - 2016-04-04 11:27 +0100

#106429 — 2.7 source import in python 3.x

A user points out that this code in reportlab uses the now deprecated imp module

def _fake_import(fn,name):
     if os.path.isfile(fn):
         import imp
         with open(fn,'rb') as f:
             imp.load_source(name,fn,f)

and suggests I use importlib SourceFileLoader. Is there anything wrong with this 
code (only for use in python 3.x)


def _fake_import(fn,name):
     from importlib import machinery
     m = machinery.SourceFileLoader(name,fn)
     try:
         return m.load_module(name)
     except FileNotFoundError:
         raise ImportError('file %s not found' % ascii(fn))

the newer import machinery seems particularly complex so I'm not at all sure 
this does what I intend even though it seems to work.

The original function is only used once like this

> try:
>     _fake_import(os.path.expanduser(os.path.join('~','.reportlab_mods')),'reportlab_mods')
> except (ImportError,KeyError):
>     pass

and is intended to allow per user actions in a config file when reportlab is 
imported.

-- 
Robin Becker

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