Loading a module from a subdirectory

[Virgil Stokes]

I have the following folder-file structure:

  C:/PythonCode/VideoPlayerSimulator/
                                  +--  __init__.py   (empty file)
                                  +--  GlbVars.py (contains the single 
class Glb)

  C:/PythonCode/VideoPlayerSimulator/RubberBanding/
                                          +--  __init__.py
                                          +--  ImportDemo.py

  where, ImportDemo.py contains the following code (a single line):

from VideoPlayerSimulator.GlbVars import Glb as G

  gives the following error when I execute it:

*ImportError: No module named VideoPlayerSimulator.GlbVars*

  Note:
   1. My sys.path contains:
      ['C:\\PythonCode\\VideoPlayerSimulator', ...]
   2. Python 2.7.5 on a Window 7 platform
   3. The same ImportDemo.py file when executed on my Window Vista platform
      with the same folder-file structure, *DOES NOT* give an error and 
works
      as expected.

Why does the error occur, and why does it not occur on the Windows Vista 
platform?

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