字符串中是否有多个字符的通配符可以传递给.replace函数？

import re

def replace_with_wildcard(string, pattern, replacement):
    # 使用re.sub函数进行替换
    new_string = re.sub(pattern, replacement, string)
    return new_string

# 示例字符串
string = "Hello, world! This is a test string."

# 使用通配符.替换所有字符
pattern = "."
replacement = "*"
new_string = replace_with_wildcard(string, pattern, replacement)
print(new_string)