Python获取下载速度并显示进度条，,#!/usr/bin

Python获取下载速度并显示进度条，,#!/usr/bin

#!/usr/bin/python3# -*- coding:utf-8 -*-import sysimport timefrom urllib import request‘‘‘ urllib.urlretrieve 的回调函数：def callbackfunc(blocknum, blocksize, totalsize):    @blocknum:  已经下载的数据块    @blocksize: 数据块的大小    @totalsize: 远程文件的大小‘‘‘def Schedule(blocknum, blocksize, totalsize):    speed = (blocknum * blocksize) / (time.time() - start_time)    # speed_str = " Speed: %.2f" % speed    speed_str = " Speed: %s" % format_size(speed)    recv_size = blocknum * blocksize        # 设置下载进度条    f = sys.stdout    pervent = recv_size / totalsize    percent_str = "%.2f%%" % (pervent * 100)    n = round(pervent * 50)    s = (‘#‘ * n).ljust(50, ‘-‘)    f.write(percent_str.ljust(8, ‘ ‘) + ‘[‘ + s + ‘]‘ + speed_str)    f.flush()    # time.sleep(0.1)    f.write(‘\r‘)# 字节bytes转化K\M\Gdef format_size(bytes):    try:        bytes = float(bytes)        kb = bytes / 1024    except:        print("传入的字节格式不对")        return "Error"    if kb >= 1024:        M = kb / 1024        if M >= 1024:            G = M / 1024            return "%.3fG" % (G)        else:            return "%.3fM" % (M)    else:        return "%.3fK" % (kb)if __name__ == ‘__main__‘:    # print(format_size(1222222222))    start_time = time.time()    filename = ‘test.data‘    url = ‘http://ip:port/path/speed.test‘    request.urlretrieve(url, filename, Schedule)

Python获取下载速度并显示进度条