I'm getting a weird instance of a NameError when attempting to use a class I wrote. In a directory, I have the following file structure:

• dir/
  
  • ReutersParser.py
  • test.py
  • reut-xxx.sgm

Where my custom class is defined in ReutersParser.py and I have a test script defined in test.py.

The ReutersParser looks something like this:

from sgmllib import SGMLParser

class ReutersParser(SGMLParser):

    def __init__(self, verbose=0):
        SGMLParser.__init__(self, verbose)

    ... rest of parser

if __name__ == '__main__':

    f = open('reut2-short.sgm')
    s = f.read()

    p = ReutersParser()
    p.parse(s)

It's a parser to deal with SGML files of Reuters articles. The test works perfectly. Anyway, I'm going to use it in test.py, which looks like this:

from ReutersParser import ReutersParser

def main():
    parser = ReutersParser()

if __name__ == '__main__':
    main()

When it gets to that parser line, I'm getting this error:

Traceback (most recent call last):
  File "D:\Projects\Reuters\test.py", line 34, in <module>
    main()
  File "D:\Projects\Reuters\test.py", line 19, in main
    parser = ReutersParser()
  File "D:\Projects\Reuters\ReutersParser.py", line 38, in __init__
    SGMLParser.__init__(self, verbose)
NameError: global name 'sgmllib' is not defined

For some reason, when I try to use my ReutersParser in test.py, it throws an error that says it cannot find sgmllib, which is a built-in module. I'm at my wits' end trying to figure out why the import won't work.

What's causing this NameError? I've tried importing sgmllib in my test.py and that works, so I don't understand why it can't find it when trying to run the constructor for my ReutersParser.