Possible bug in graded exercise 2

[hejops]

The third function is named filter in the template (which is shared with the python built-in), but it seems to cause test_11 to fail. Renaming the function to filter_tokens allowed the test to pass.

# >       self.assertEqual(submission.filter_tokens(tokens), cleaned)
# E       AttributeError: module 'submission' has no attribute 'filter_tokens'
# 
# tests.py:220: AttributeError

[rattletat]

Please use our communication channel for exercise-specific issues. That said, the exercise description already changed yesterday and your error message basically says that your submission lacks the function filter_tokens (formerly poorly translated as just filter).