Newbie question: WinNT Python 1.5.2 - import seems not to work the way I expect

[Parzival]

I am running Python 1.5.2 on Win NT 4.0.

I am trying to explore the "dopy" distributed object module, and the modules
fail with import errors. I tried to reduce this problem to its simplest
manifestation, and found that I got one result in IDLE, and another running
my test module from the command prompt. The contents of "dopy" directory
are:

F:\Program Files\Python\dopy>ls
Manual.html    __init__.py    dopy.pyc       naming.pyc     tb.pyc
Manual.nml     __init__.pyc   dopyclient.py  pos.py         tcp.py
README.html    backup         dopyserver.py  pos.pyc        tcp.pyc
README.txt     dopy.py        naming.py      tb.py          testimp.py


The test script "testimp.py" reads:

import sys
print sys.path
from dopy import tcp


The output of the script (the news client may split the lines):

F:\Program Files\Python\dopy>testimp.py
['F:\\PROGRA~1\\Python\\dopy', 'F:\\PROGRA~1\\Python', 'F:\\Program
Files\\Python\\Lib\\plat-win', 'F:\\Program Files\\Python\\Lib',
'F:\\Program Files\\Python\\DLLs', 'F:\\Program Files\\Python\\Lib\\lib-tk',
'F:\\Program Files\\Python', 'F:\\Program Files\\Python\\DLLs', 'F:\\Program
Files\\Python\\lib', 'F:\\Program Files\\Python\\lib\\plat-win',
'F:\\Program Files\\Python\\lib\\lib-tk', 'F:\\Program Files\\Python']
Traceback (innermost last):
  File "F:\PROGRA~1\Python\dopy\testimp.py", line 3, in ?
    from dopy import tcp
ImportError: cannot import name tcp


When running the Python command prompt, the same commands produce the
following output:

Python 1.5.2 (#0, Apr 13 1999, 10:51:12) [MSC 32 bit (Intel)] on win32
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> import sys
>>> print sys.path
['', 'F:\\PROGRA~1\\Python', 'F:\\Program Files\\Python\\Lib\\plat-win',
'F:\\Pr
ogram Files\\Python\\Lib', 'F:\\Program Files\\Python\\DLLs', 'F:\\Program
Files
\\Python\\Lib\\lib-tk', 'F:\\Program Files\\Python', 'F:\\Program
Files\\Python\
\DLLs', 'F:\\Program Files\\Python\\lib', 'F:\\Program
Files\\Python\\lib\\plat-
win', 'F:\\Program Files\\Python\\lib\\lib-tk', 'F:\\Program Files\\Python']
>>> from dopy import tcp
>>>


I.e. the commands found in the script succeed.
When I load testimp.py in the IDLE editor, and run it I get:

['F:\\PROGRA~1\\Python\\Tools\\idle', 'F:\\PROGRA~1\\Python', 'F:\\Program
Files\\Python\\Lib\\plat-win', 'F:\\Program Files\\Python\\Lib',
'F:\\Program Files\\Python\\DLLs', 'F:\\Program Files\\Python\\Lib\\lib-tk',
'F:\\Program Files\\Python', 'F:\\Program Files\\Python\\DLLs', 'F:\\Program
Files\\Python\\lib', 'F:\\Program Files\\Python\\lib\\plat-win',
'F:\\Program Files\\Python\\lib\\lib-tk', 'F:\\Program Files\\Python']


I.e. the script also succeeds. So, my question is why do I get this
import failure when running testimp.py from the command prompt?

- Parzival