[python] Counter list 원소 개수 세기

from collections import Counter

print(Counter(['a','b','c','a','d','c']))
print(Counter(['a','b','c','a','d','c'])['a'])

Counter 접근 

Counter[찾고자하는 값]

Counter({'a': 2, 'c': 2, 'b': 1, 'd': 1})
2