[Tutor] function vs module

[Chris Kassopulo]

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Greetings,

I'm working on some scripts that output stuff to the screen.  For
example, the attached script, list_modules.py formats and outputs
a list of builtin modules.  When I convert it to ListModules.py
to use a module, ListColumns.py I get:

$ /home/ckasso/python/scripts/AsciiChart.py
Traceback (most recent call last):
  File "/home/ckasso/python/scripts/AsciiChart.py", line 50, in ?
    ListColumns.ListColumns(AsciiList)
  File "/home/ckasso/python/scripts/ListColumns.py", line 18, in
ListColumns
    if ReturnFlag == 0:
NameError: global name 'ReturnFlag' is not defined

ReturnFlag = 0 at the beginning of ListColumns gets around the
error, but I can't set it there.  The intention is that scripts
that use ListColumns will set the flag and ListColumns just reads
it.  I thought that making ReturnFlag global in ListColumns would 
work, but it doesn't.
 
Could someone shed some light on this please. 

Thanks,
                
Chris Kassopulo
Python 2.2.1 (#1, Apr 11 2002, 15:27:15)
               






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