twee > outfile.html generates this stack trace:
Traceback (most recent call last):
File "/Users/jjohnston/src/twee/twee", line 104, in
main(sys.argv[1:])
File "/Users/jjohnston/src/twee/twee", line 88, in main
print tw.toHtml()
TypeError: toHtml() takes at least 2 arguments (1 given)
I resolved this by changing line 87 to
print tw.toHtml(None, None)
It seems that even though the method toHtml() sets defaults for its arguments, python would see like to see two parameters passed in. Go figure.