1、方法一（显示百分比）

import urllib.request
import sys
import os


def File_plus():
    '''
    文件储存位置
    判断文件是否存在，不存在则创建
    '''
    folder_path = "C:/Users/Admin/Desktop/download/"
    if not os.path.exists(folder_path):
        os.makedirs(folder_path)

    return folder_path


def progress(block_num, block_size, total_size):
    '''回调函数
        @block_num: 已经下载的数据块
        @block_size: 数据块的大小
        @total_size: 远程文件的大小
        write(): 显示下载进度,"\r"使得光标回到行首
        flush(): 刷新缓存区
    '''
    per = block_num * block_size / total_size * 100.0
    sys.stdout.write('\r>> Downloading %.1f%%' % (per))
    sys.stdout.flush()


def download():
    folder_path = File_plus()
    url = 'http://www.python.org/ftp/python/2.7.5/Python-2.7.5.tar.bz2'
    local = url.split('/')[-1]
    urllib.request.urlretrieve(url, folder_path+local, progress)


if __name__ == '__main__':
    download()

2、方法二（文件名+百分比）

import urllib.request
import sys
import os

url = 'http://www.python.org/ftp/python/2.7.5/Python-2.7.5.tar.bz2'
local = url.split('/')[-1]


def File_plus():
    '''
    文件储存位置
    判断文件是否存在，不存在则创建
    '''
    folder_path = "C:/Users/Admin/Desktop/download/"
    if not os.path.exists(folder_path):
        os.makedirs(folder_path)

    return folder_path


def progress(block_num, block_size, total_size):
    '''回调函数
        @block_num: 已经下载的数据块
        @block_size: 数据块的大小
        @total_size: 远程文件的大小
        write(): 显示下载进度,"\r"使得光标回到行首
        flush(): 刷新缓存区
    '''
    sys.stdout.write('\r>> Downloading %s %.1f%%' % (
            local, float(block_num * block_size) / float(total_size) * 100.0))
    sys.stdout.flush()


def download():
    folder_path = File_plus()
    urllib.request.urlretrieve(url, folder_path+local, progress)


if __name__ == '__main__':
    download()

3、方法三（显示文件大小）

import urllib.request
import sys
import os


def File_plus():
    '''
    文件储存位置
    判断文件是否存在，不存在则创建
    '''
    folder_path = "C:/Users/Admin/Desktop/download/"
    if not os.path.exists(folder_path):
        os.makedirs(folder_path)

    return folder_path


def progress(block_num, block_size, total_size):
    '''回调函数
        @block_num: 已经下载的数据块
        @block_size: 数据块的大小
        @total_size: 远程文件的大小
        write(): 显示下载进度,"\r"使得光标回到行首
        flush(): 刷新缓存区
    '''
    per = block_num * block_size / total_size * 100.0
    downsize = block_num * block_size
    Do_size = '\r>> Downloading:%.1f%%' % (per)+" ===> "+"%.2fM" % (
            downsize/1024/1024) + "/" + "%.2fM" % (total_size/1024/1024)
    sys.stdout.write(Do_size)
    sys.stdout.flush()


def download():
    folder_path = File_plus()
    url = 'http://www.python.org/ftp/python/2.7.5/Python-2.7.5.tar.bz2'
    local = url.split('/')[-1]
    urllib.request.urlretrieve(url, folder_path+local, progress)


if __name__ == '__main__':
    download()

4、方法四（显示下载进度条）

import urllib.request
import sys
import os


def File_plus():
    '''
    文件储存位置
    判断文件是否存在，不存在则创建
    '''
    folder_path = "C:/Users/Admin/Desktop/download/"
    if not os.path.exists(folder_path):
        os.makedirs(folder_path)

    return folder_path


def format_size(bytes):
    '''
    字节bytes转化K M G
    '''
    bytes = float(bytes)  # B(比特)
    kb = bytes / 1024
    if kb >= 1024:
        M = kb / 1024
        if M >= 1024:
            G = M / 1024
            return "%.2fG" % (G)
        else:
            return "%.2fM" % (M)
    else:
        return "%.2fK" % (kb)


def progress(block_num, block_size, total_size):
    '''回调函数
        @block_num: 已经下载的数据块
        @block_size: 数据块的大小
        @total_size: 远程文件的大小
        write(): 显示下载进度,"\r"使得光标回到行首
        flush(): 刷新缓存区
    '''
    downsize = block_num * block_size
    speed_str = " 下载进度:%s" % format_size(downsize)
    Totalsize = "/%.2fM" % (total_size/1024/1024)
    # 设置下载进度条
    pervent = downsize / total_size
    n = round(pervent * 50)
    s = ('#' * n).ljust(50, '-')
    sys.stdout.write('\r' + speed_str + Totalsize+'[' + s + ']')
    sys.stdout.flush()


def download():
    folder_path = File_plus()
    url = 'http://www.python.org/ftp/python/2.7.5/Python-2.7.5.tar.bz2'
    local = url.split('/')[-1]
    urllib.request.urlretrieve(url, folder_path+local, progress)


if __name__ == '__main__':
    download()