python用户输入一个长字符串,统计某个单词出现的次数

Question

str = input('输入句子:')
str_my = 'china'
list = str.split( )
count = 0
for item in list:
if item == str_my:
count += 1
print('china出现的次数为：',count)

Answer 1

str=input("请输入字符")
l=list(str)
a={}
for i in l:
a[i]=l.count(i)
print(a)

Answer 2

str=input("请输入字符")
l=list(str)
a={}
for i in l:
a[i]=l.count(i)
print(a)