# 文件下载方法

from urllib.request import urlretrieve

import requests

# 第一

urlimage  = 'https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tar.xz'

urlretrieve(urlimage, "logo.tar.xz")

#第二

ir = requests.get(urlimage, stream=True)

print (ir.status_code)

if ir.status_code == 200:

    with open('logo2.tar.xz', 'wb') as f:

        for chunk in ir:

            f.write(chunk)

#第三

ir = requests.get(urlimage)

print (ir.status_code)

if ir.status_code == 200:

    with open('logo3.tar.xz', 'wb') as f:

        f.write(ir.content)