Remove importlib dependency which not available in Python 2.6.

[bfroehle]

Since we are only doing an absolute import, it suffices to just run
__import__(name) and then find the module in sys.modules.

Compare to the import_module source:

def import_module(name, package=None):
    if name.startswith('.'):
        # ...
    __import__(name)
    return sys.modules[name]

Closes #1874.

[ivanov]

Thanks, Brad. This fix looks clean if we don't expect relative imports to be made here, since that's what the omitted if name.startswith('.'): block does.

[bfroehle]

Yep, and we certainly wouldn't be using relative imports here.

[fperez]

Test results for commit 7067c17 merged into master
Platform: linux2

• python2.7: Failed, log at https://gist.github.com/2893394 (libraries not available: wx.aui)
• python3.2: OK (libraries not available: cython matplotlib pymongo rpy2 wx wx.aui)

Not available for testing:

[fperez]

Mmh, I'm getting that failure above, but I'm also seeing problems on master right now. How about you guys? This PR actually looks clean, but I'd prefer to get master back in passing shape before doing any more merging...

[fperez]

Actually, this is really too simple to block on, let's go ahead. Thanks @bfroehle! My worry on master remains, but that's a separate problem.

[ivanov]

@fperez: i'm seeing that same error, fwiw

[fperez]

On Thu, Jun 7, 2012 at 9:59 PM, Paul Ivanov
reply@reply.github.com
wrote:

@fperez: i'm seeing that same error, fwiw

Mmh, ok... We'll have to get master in shape soon then, thanks!

f