计算字符数量-代码实现

①单个字符
message='It was a bright cold day in April,and the clocks were striking thirteen.'
count={}
for i in message:
    count.setdefault(i,0)
    count[i]=count[i]+1
print(count)
{'I': 1, 't': 6, ' ': 12, 'w': 2, 'a': 4, 's': 3, 'b': 1, 'r': 5, 'i': 6, 'g': 2, 'h': 3, 'c': 3, 'o': 2, 'l': 3, 'd': 3, 'y': 1, 'n': 4, 'A': 1, 'p': 1, ',': 1, 'e': 5, 'k': 2, '.': 1}


②字符串
message=['a','a','bb']
count={}
for i in message:
    count.setdefault(i,0)
    count[i]=count[i]+1
print(count)

{'a': 2, 'bb': 1}