[code-quality] pylint import succeeds or fails depending on a previous import statement

[Alexey Bashtanov]

Hello,

I came across the following problem with pylint: a import from a local 
directory works only if there's some `from ... import ...` statement above.
My code is organized as follows:

~/pylinttest/
foo/
         bar.py
         baz.py
         qux.py
         __init__.py
     .pylintrc

bar.py contains the following code:
from urllib import request
import qux

baz.py contains the following code:
import qux

Here are the results of running pylint:
alexey at ev9d9:~/pylinttest$ pylint foo.bar
Using config file /home/alexey/pylinttest/.pylintrc
************* Module foo.bar
W:  1, 0: Unused request imported from urllib (unused-import)
W:  2, 0: Unused import qux (unused-import)
alexey at ev9d9:~/pylinttest$ pylint foo.baz
Using config file /home/alexey/pylinttest/.pylintrc
************* Module foo.baz
E:  1, 0: Unable to import 'qux' (import-error)
W:  1, 0: Unused import qux (unused-import)

Why does it fail to load qux only if there was no from-import statement 
before?
Changing urllib.request to e.g. collections.deque does not make a 
difference.

My pylint version is 1.1.0, and it can be reproduced both with python 
2.7.5 and 3.4.0

Regards,
   Alexey