咱们直接看代码：

参数看到不懂

很详细有没有：

懂了吗，不懂就收藏一下，可以拿来直接用？

可以关注 回复 ：tqdm

# -*- coding: utf-8 -*-

"""

@Time: 2018/1/16

@Author: songhao

@微信公众号: zeropython

@File: index.py

"""

import os

from urllib.request import urlopen

import requests

from tqdm import tqdm

def download_from_url(url, dst):

"""

@param: url to download file

@param: dst place to put the file

"""

file_size = int(urlopen(url).info().get('Content-Length', -1))

"""

print(urlopen(url).info())

# output

Server: AliyunOSS

Date: Tue, 19 Dec 2017 06:55:41 GMT

Content-Type: application/octet-stream

Content-Length: 29771146

Connection: close

x-oss-request-id: 5A38B7EDCE2B804FFB1FD51C

Accept-Ranges: bytes

ETag: "9AA9C1783224A1536D3F1E222C9C791B-6"

Last-Modified: Wed, 15 Nov 2017 10:38:33 GMT

x-oss-object-type: Multipart

x-oss-hash-crc64ecma: 14897370096125855628

x-oss-storage-class: Standard

x-oss-server-time: 4

"""

if os.path.exists(dst):

first_byte = os.path.getsize(dst)

else:

first_byte = 0

if first_byte >= file_size:

return file_size

header = {"Range": "bytes=%s-%s" % (first_byte, file_size)}

pbar = tqdm(

total=file_size, initial=first_byte,

unit='B', unit_scale=True, desc=url.split('/')[-1])

req = requests.get(url, headers=header, stream=True)

with(open(dst, 'ab')) as f:

for chunk in req.iter_content(chunk_size=1024):

if chunk:

f.write(chunk)

pbar.update(1024)

pbar.close()

return file_size

if __name__ == '__main__':

url = "http://newoss.maiziedu.com/machinelearning/pythonrm/pythonrm5.mp4"

download_from_url(url, "./new.mp4")

来源：51CTO

作者：mb5ff2f21b6d2a1

链接：https://blog.51cto.com/15075510/2582053