'break' Causes Execution of Procedure?

[Scott Brady Drummonds]

Hi, everyone,

I have a bug in a script of several hundred lines of code that I cannot
figure out.  I have attempted (unsuccessfully) to duplicate this problem in
a smaller script that I can post here but have been unsuccessful.  As such,
I'm posting code snippets here in the hopes that someone recognizes a very
basic mistake I've made and can straighten me out.

First, the portion of my text file that executes my code:

<quote>
if __name__ == '__main__':
  if len(sys.argv) != 2:
    print('usage: %s <config_file>' % sys.argv[0])
    sys.exit()

  main(sys.argv[1])
</quote>

Here are the first few lines of my 'main' procedure:
<quote>
def main(fileName):
  print('DEBUG: begin main procedure')
  ...
</quote>

And here is the part that is causing problems:
<quote>
    #  'keys' is a list of integers returned from dict.keys()
    for cycle in keys:
      if key in skipList:
        print ('skipping %d/%d' % (cycle, cycleMap[cycle]))
        continue
      try:
        print('DEBUG: advancing both simulators to %d' % cycle)
        procedureThatCouldRaiseEOFError()
      except EOFError:
        print('DEBUG: encountered EOFError; breaking loop')
        break
    print('DEBUG: All cycles processed')
</quote>

Here's what I can't figure out.  I'm seeing the following text generated
during this script's execution:
<quote>
DEBUG: advancing both simulators to 20178
DEBUG: encountered EOFError; breaking loop
DEBUG: begin main procedure
</quote>

How is it possible that the call to 'break' is seemingly being replaced with
a call to 'main'?

Thanks!
Scott

-- 
Remove .nospam from my e-mail address to mail me.