如何在字符串Python中找到一个浮点数？

import re

def find_float_number(string):
    pattern = r"\d+\.\d+"
    match = re.search(pattern, string)
    if match:
        return match.group()
    else:
        return "No float number found"

# 示例用法
string = "这是一个包含浮点数的字符串，如3.14"
result = find_float_number(string)
print(result)

3.14