如何通过*“连接”部分隐藏的数字(Python)

import re

def extract_hidden_number(url):
    # 提取连接部分
    match = re.search(r'(?<=\?).*', url)
    if match:
        connection_part = match.group(0)
    else:
        return None

    # 查找隐藏的数字
    hidden_number = ''
    for char in connection_part:
        if char.isdigit():
            hidden_number += char

    # 转换为整数类型
    if hidden_number:
        hidden_number = int(hidden_number)

    return hidden_number

# 示例用法
url = 'https://example.com/?abc123'
hidden_number = extract_hidden_number(url)
print(hidden_number)