查找并打印python中的非字母数字字符数

import re

def count_non_alnum_chars(text):
    pattern = r'[^a-zA-Z0-9]'
    non_alnum_chars = re.findall(pattern, text)
    count = len(non_alnum_chars)
    return count

text = "Hello, World! 123"
result = count_non_alnum_chars(text)
print("非字母数字字符数：", result)

def count_non_alnum_chars(text):
    count = sum(not c.isalnum() for c in text)
    return count

text = "Hello, World! 123"
result = count_non_alnum_chars(text)
print("非字母数字字符数：", result)