如何让python脚本等待下载完成

import urllib.request
import os
import time

def download_file(url, save_path):
    urllib.request.urlretrieve(url, save_path)

def wait_for_download(file_path):
    while not os.path.exists(file_path):
        time.sleep(1)

# 示例用法
url = "https://example.com/file.txt"
save_path = "path/to/save/file.txt"

download_file(url, save_path)
wait_for_download(save_path)
print("下载完成！")

import requests
import os
import time

def download_file(url, save_path):
    response = requests.get(url)
    with open(save_path, "wb") as file:
        file.write(response.content)

def wait_for_download(file_path):
    while not os.path.exists(file_path):
        time.sleep(1)

# 示例用法
url = "https://example.com/file.txt"
save_path = "path/to/save/file.txt"

download_file(url, save_path)
wait_for_download(save_path)
print("下载完成！")