I keep getting stuck at:

Traceback (most recent call last): File "/usr/bin/selfspy", line 19, in <module> from activity_store import ActivityStore File "/private/var/lib/selfspy/activity_store.py", line 9, in <module> import sniff_cocoa File "/private/var/lib/selfspy/sniff_cocoa.py", line 1, in <module> from Foundation import NSObject, NSLog ImportError: No module named Foundation