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Python Python Collections (Retired) Dictionaries Membership

Michael Todisco
Michael Todisco
2,790 Points
Posted by Michael Todisco
Michael Todisco
2,790 Points

I am on the section counts.py and I can't figure it out. Please Help!

My task is:

Write a function named members that takes two arguments, a dictionary and a list of keys. Return a count of how many of the items in the list are also keys in the dictionary.

2 Answers

Hanley Chan
Hanley Chan
27,771 Points
Hanley Chan
Hanley Chan
27,771 Points

Hello,

For this one you could loop through the list of keys and check if each one is inside your dictionary. 

counter = 0
for key in keys:
  if key in dictionary:
    count += 1
Jeffrey Ruder
Jeffrey Ruder
6,408 Points
Jeffrey Ruder
Jeffrey Ruder
6,408 Points

I think this Stack Overflow post talks about this in more detail.