Python sdist package directory not found: Solved

Just was trying to create a new Python module and submit it to PyPi. Trouble was, when I was doing the standard:

me@mybox ~/myusername/blah
$ python setup.py sdist --formats=gztar,zip,bztar,ztar,tar
running sdist
error: package directory 'filenameX' does not exist

turns out the problem was, my setup.py had the following line:

py_modules = ['filenameX.py'],

This should be:

py_modules = ['filenameX'],

FIXED IT! Yay! Now it proceeds nicely.