Getting "assert bindings is not None" Assertion Error

[BenjaminRH]

I'm getting the following error when I try to run pytyle3 on CrunchBang 11:

Traceback (most recent call last):
  File "/usr/local/bin/pytyle3", line 13, in <module>
    import pt3.keybind
  File "/usr/local/lib/python2.7/dist-packages/pt3/keybind.py", line 26, in <module>
    assert bindings is not None
AssertionError