Python 给下载文件显示进度条和下载时间的实现

# 进度条模块
def progressbar(url,path):
 if not os.path.exists(path): # 看是否有该文件夹，没有则创建文件夹
  os.mkdir(path)
 start = time.time() #下载开始时间
 response = requests.get(url, stream=True) #stream=True必须写上
 size = 0 #初始化已下载大小
 chunk_size = 1024 # 每次下载的数据大小
 content_size = int(response.headers['content-length']) # 下载文件总大小
 try:
 if response.status_code == 200: #判断是否响应成功
  print('Start download,[File size]:{size:.2f} MB'.format(size = content_size / chunk_size /1024)) #开始下载，显示下载文件大小
  filepath = path+'\name.extension name' #设置图片name，注：必须加上扩展名
  with open(filepath,'wb') as file: #显示进度条
  for data in response.iter_content(chunk_size = chunk_size):
   file.write(data)
   size +=len(data)
   print('\r'+'[下载进度]:%s%.2f%%' % ('>'*int(size*50/ content_size), float(size / content_size * 100)) ,end=' ')
 end = time.time() #下载结束时间
 print('Download completed!,times: %.2f秒' % (end - start)) #输出下载用时时间
 except:

import os
import requests
import time

# 进度条模块
def progressbar(url,path):
 if not os.path.exists(path): # 看是否有该文件夹，没有则创建文件夹
  os.mkdir(path)
 start = time.time() #下载开始时间
 response = requests.get(url, stream=True)
 size = 0 #初始化已下载大小
 chunk_size = 1024 # 每次下载的数据大小
 content_size = int(response.headers['content-length']) # 下载文件总大小
 try:
 if response.status_code == 200: #判断是否响应成功
  print('Start download,[File size]:{size:.2f} MB'.format(size = content_size / chunk_size /1024)) #开始下载，显示下载文件大小
  filepath = path+'\Pikachu.jpg' #设置图片name，注：必须加上扩展名
  with open(filepath,'wb') as file: #显示进度条
  for data in response.iter_content(chunk_size = chunk_size):
   file.write(data)
   size +=len(data)
   print('\r'+'[下载进度]:%s%.2f%%' % ('>'*int(size*50/ content_size), float(size / content_size * 100)) ,end=' ')
 end = time.time() #下载结束时间
 print('Download completed!,times: %.2f秒' % (end - start)) #输出下载用时时间
 except:
 print('Error!')

def main():
 #下载皮卡丘图片
 url = 'https://img.moegirl.org/common/thumb/e/ed/%E7%9A%AE%E5%8D%A1%E4%B8%98%E4%B9%8B%E6%AD%8C.jpg/1200px-%E7%9A%AE%E5%8D%A1%E4%B8%98%E4%B9%8B%E6%AD%8C.jpg'
 path = r'E:\123' # 设置下载到本地的地址
 progressbar(url,path)

if __name__ == '__main__':
 main()