import requests

import time

def downloadFile(name, url):

    headers = {'Proxy-Connection':'keep-alive'}

    r = requests.get(url, stream=True, headers=headers)

    length = float(r.headers['content-length'])

    f = open(name, 'wb')

    count =

    count_tmp =

    time1 = time.time()

    for chunk in r.iter_content(chunk_size = ):

        if chunk:

            f.write(chunk)

            count += len(chunk)

            if time.time() - time1 > :

                p = count / length *

                speed = (count - count_tmp) /  /  /

                count_tmp = count

                print(name + ': ' + formatFloat(p) + '%' + ' Speed: ' + formatFloat(speed) + 'M/S')

                time1 = time.time()

    f.close()

def formatFloat(num):

    return '{:.2f}'.format(num)

if __name__ == '__main__':

    downloadFile('360.exe', 'http://down.360safe.com/setup.exe')

bogon:Desktop macname$ python3 test.py

.exe: 4.82% Speed: 1.98M/S

.exe: 9.36% Speed: 1.86M/S

.exe: 13.79% Speed: 1.81M/S

.exe: 18.15% Speed: 1.79M/S

.exe: 24.17% Speed: 2.47M/S

.exe: 29.52% Speed: 2.19M/S

.exe: 35.41% Speed: 2.41M/S

.exe: 41.31% Speed: 2.42M/S

.exe: 46.90% Speed: 2.29M/S

.exe: 52.36% Speed: 2.24M/S

.exe: 58.64% Speed: 2.57M/S

.exe: 64.07% Speed: 2.23M/S

.exe: 69.33% Speed: 2.16M/S

.exe: 73.85% Speed: 1.85M/S

.exe: 79.36% Speed: 2.26M/S

.exe: 85.48% Speed: 2.51M/S

.exe: 92.27% Speed: 2.78M/S

.exe: 97.85% Speed: 2.28M/S