Question

所以我想使用urllib2制作进度条或百分比。

我在堆栈溢出的不同问题上发现了这段代码：

import urllib2, sys

def chunk_report(bytes_so_far, chunk_size, total_size):
   percent = float(bytes_so_far) / total_size
   percent = round(percent*100, 2)
   sys.stdout.write("Downloaded %d of %d bytes (%0.2f%%)\r" % 
       (bytes_so_far, total_size, percent))

   if bytes_so_far >= total_size:
      sys.stdout.write('\n')

def chunk_read(response, chunk_size=8192, report_hook=None):
   total_size = response.info().getheader('Content-Length').strip()
   total_size = int(total_size)
   bytes_so_far = 0

   while 1:
      chunk = response.read(chunk_size)
      bytes_so_far += len(chunk)

      if not chunk:
         break

      if report_hook:
         report_hook(bytes_so_far, chunk_size, total_size)

   return bytes_so_far

if __name__ == '__main__':
   response = urllib2.urlopen('http://www.ebay.com');
   chunk_read(response, report_hook=chunk_report)

但我不知道它下载到哪里。

那么您如何修复此代码以了解其下载的位置或进度条的编号。

Answer 1

看起来数据被丢弃了。您可以修改chunk_read功能以将其保存到文件中。

修改后的chunk_read将返回读取数据：

def chunk_read(response, chunk_size=8192, report_hook=None):
   total_size = response.info().getheader('Content-Length').strip()
   total_size = int(total_size)
   bytes_so_far = 0
   data = []

   while 1:
      chunk = response.read(chunk_size)
      bytes_so_far += len(chunk)

      if not chunk:
         break

      data += chunk
      if report_hook:
         report_hook(bytes_so_far, chunk_size, total_size)

   return "".join(data)

下载进度条urllib2 python

1 个答案: