如何在python中从关键字后的字符串中提取浮点数

import re

def extract_float_from_string(string):
    pattern = r'\b\d+\.\d+\b'
    matches = re.findall(pattern, string)
    floats = [float(match) for match in matches]
    return floats

# 示例用法
keyword = '提取浮点数'
string = '这是一个示例字符串，关键字后的字符串是3.14和2.71828'
result = extract_float_from_string(string)
print(result)  # 输出 [3.14, 2.71828]