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Python Python Collections (Retired) Dictionaries Membership

Terry Lowery
PLUS
Terry Lowery
Courses Plus Student 2,856 Points
Posted by Terry Lowery
Terry Lowery
Courses Plus Student 2,856 Points

Works in python but not in treehouse

def members(a_list, a_dict):
  match = 0
  for a in a_list:
    if a in a_dict.keys():
      match += 1
  return match

2 Answers

Kenneth Love
STAFF
Kenneth Love
Treehouse Guest Teacher
Kenneth Love
Kenneth Love
Treehouse Guest Teacher

This seems to be a fun different in Python 3. dict.keys() returns a generator, not a list, so you can't check for membership (at least that's what I'm getting from a bit of testing). Change your if to if a in a_dict: (which is a better check, anyway), passes the CC just fine.