In trying to use the linecache.getline() function to extra data from a plain-text database format that I'm building. Every time I make a call to it (even from the interpreter directly) I get an error like the one below. I believe the problem lies in the linecache module itself.

Traceback (most recent call last):
  File "/Users/jordanmeyer/Documents/Python/eFlashcard/alpha/0.1a2/eFlashcard_0.1a2.py", line 59, in <module>
    eFlashcard_main()
  File "/Users/jordanmeyer/Documents/Python/eFlashcard/alpha/0.1a2/eFlashcard_0.1a2.py", line 17, in eFlashcard_main
    eFlashcard_build()
  File "/Users/jordanmeyer/Documents/Python/eFlashcard/alpha/0.1a2/eFlashcard_0.1a2.py", line 31, in eFlashcard_build
    while str(linecache.getline(lib_file, lib_index, module_globals=None)) != '':
  File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/linecache.py", line 15, in getline
    lines = getlines(filename, module_globals)
  File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/linecache.py", line 41, in getlines
    return updatecache(filename, module_globals)
  File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/linecache.py", line 76, in updatecache
    if not filename or (filename.startswith('<') and filename.endswith('>')):
AttributeError: '_io.TextIOWrapper' object has no attribute 'startswith'

The linecache module functions take a filename string as an argument, not a file object.  Try:

   linecache.getlines("/path/to/filename", lineno)

http://docs.python.org/py3k/library/linecache.html