Test if set is a subset, considering the number (multiplicity) of each element in the set

Question

I know I can test if set1 is a subset of set2 with:

{\'a\',\'b\',\'c\'} <= {\'a\',\'b\',\'c\',\'d\',\'e\'} # True

But the following is a

Answer 1

As stated in the comments, a possible solution using Counter:

from collections import Counter

def issubset(X, Y):
    return len(Counter(X)-Counter(Y)) == 0