清理URL并将其保存到txt文件Python3

import re

def clean_url(url):
    # 清理URL中的无效字符和特殊字符
    cleaned_url = re.sub(r"[^a-zA-Z0-9:/._-]", "", url)
    return cleaned_url

def save_to_txt(urls, filename):
    with open(filename, "w") as file:
        for url in urls:
            file.write(url + "\n")

# 示例数据
urls = [
    "https://example.com",
    "http://www.example.com",
    "https://www.example.com/path/page.html?query=example",
    "invalid_url",
    "https://www.example.com/invalid_page.html#section",
]

# 清理URL并保存到txt文件
cleaned_urls = [clean_url(url) for url in urls]
save_to_txt(cleaned_urls, "cleaned_urls.txt")