python3 爬虫利用Requests 实现下载进度条

#coding:utf-8


import requests
from contextlib import closing

#文件下载器
def Down_load(file_url,file_path):
    headers = {"User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"}
    with closing(requests.get(file_url,headers=headers,stream=True)) as response:
        chunk_size = 1024  # 单次请求最大值
        content_size = int(response.headers['content-length'])  # 内容体总大小
        data_count = 0
        with open(file_path, "wb") as file:
            for data in response.iter_content(chunk_size=chunk_size):
                file.write(data)
                data_count = data_count + len(data)
                now_jd = (data_count / content_size) * 100
                print("\r 文件下载进度：%d%%(%d/%d) - %s" % (now_jd, data_count, content_size, file_path), end=" ")


if __name__ == '__main__':
    headers = {
        "User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36",
    }
    file_url = 'https://down.360safe.com/se/360se8.1.1.404.exe' #文件链接
    file_path = "D:\\demo/002.exe"   #文件路径
    Down_load(file_url,file_path)