[issue2588] A bug in demandimport raises an AttributeError for modules which have already been imported

[Anthony Lalande]

New submission from Anthony Lalande <anthony.lalande at gmail.com>:

It seems that there is a divergence between the way demandimport populates 
module namespaces, and the way the native __import__ function does.

In short, it is possible to have something like:

  import package.foo

and, when one tries to access package.foo later *in the same source file*, get 
an error:

  AttributeError: 'module' object has no attribute 'foo'



I've put together a very simple test case, which demonstrates the problem. It 
is packaged in the form of a Mercurial extension which doesn't implement any 
commands. To replicate:

  hg --config "extensions.ditest=/path/to/demandimport_test"



I've derived two workarounds (documented within the sample code), but without 
getting buried in how CPython implements the __import__ call at a very low 
level, I'm not yet sure how to fix...?

Any help would be greatly appreciated!

----------
files: demandimport_test.tgz
messages: 14879
nosy: tonyboy
priority: bug
status: unread
title: A bug in demandimport raises an AttributeError for modules which have already been imported

____________________________________________________
Mercurial issue tracker <bugs at mercurial.selenic.com>
<http://mercurial.selenic.com/bts/issue2588>
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