Question

How to count list elements in Python

Answer 1

lst1 = [8, 9, 0, 2, 1, 6]
print("a)", len(lst1))

lst2 = [0] * 30
print("b)",len(lst2))

lst3 = [[1, 2, 3], [4, 5], [6, 7, 8, 9, 10]]
print("c)", len(lst3))

import itertools, collections
countlst3 = collections.Counter(itertools.chain(*lst3))
print("c)", len(countlst3))



'''
run:

a) 6
b) 30
c) 3
c) 10

'''

 

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