题解 | #HJ40 统计字符#
统计字符
https://www.nowcoder.com/practice/539054b4c33b4776bc350155f7abd8f5
方法1-常规
s = input()
# 初始化计数器
alpha, space, digit, other = 0, 0, 0, 0
# 遍历字符串，统计各类字符的个数
for char in s:
if char.isalpha():
alpha += 1
elif char.isspace():
space += 1
elif char.isdigit():
digit += 1
else:
other += 1
print(alpha)
print(space)
print(digit)
print(other)
方法2-正则表达式
import re s = input() print(len(re.findall(r'[a-zA-Z]', s))) print(len(re.findall(r'\s', s))) print(len(re.findall(r'\d', s))) print(len(re.findall(r'[^a-zA-Z0-9\s]', s)))
