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Python Python Collections (Retired) Dictionaries Membership

Jerle Norton
Jerle Norton
905 Points
Posted by Jerle Norton
Jerle Norton
905 Points

Need some help with the Membership objective.

https://teamtreehouse.com/library/python-collections/dictionaries/membership

counts.py 
# You can check for dictionary membership using the
# "key in dict" syntax from lists.

### Example
# my_dict = {'apples': 1, 'bananas': 2, 'coconuts': 3}
# my_list = ['apples', 'coconuts', 'grapes', 'strawberries']
# members(my_dict, my_list) => 2
jacinator
jacinator
11,936 Points

What code have you tried so far?

1 Answer

John Simmons
John Simmons
1,247 Points 
def members(dictionary, lst):
    count = 0
    for item in lst:
        if item in dictionary:
            count += 1
    return count

def members(dictionary, lst):
    member_count = [item for item in in lst if item in dictionary]
    return len(member_count)
Jerle Norton
Jerle Norton
905 Points
Jerle Norton
Jerle Norton
905 Points

Thanks John. I was really close but i see now what i was doing wrong.