在Python中多次读取同一文件

2019年8月4日 134次阅读

我需要下载文本文件的zip存档,将存档中的每个文本文件分发给其他处理程序进行处理,最后将解压缩的文本文件写入磁盘.

我有以下代码.它在同一个文件上使用多个打开/关闭,这看起来并不优雅.如何让它更优雅高效？

zipped = urllib.urlopen('www.abc.com/xyz.zip')
buf = cStringIO.StringIO(zipped.read())
zipped.close()
unzipped = zipfile.ZipFile(buf, 'r')
for f_info in unzipped.infolist():
   logfile = unzipped.open(f_info)
   handler1(logfile)
   logfile.close()   ## Cannot seek(0). The file like obj does not support seek()
   logfile = unzipped.open(f_info)
   handler2(logfile)
   logfile.close()
   unzipped.extract(f_info)

最佳答案 您的答案在您的示例代码中.只需使用StringIO来缓冲日志文件：

zipped = urllib.urlopen('www.abc.com/xyz.zip')
buf = cStringIO.StringIO(zipped.read())
zipped.close()
unzipped = zipfile.ZipFile(buf, 'r')
for f_info in unzipped.infolist():
   logfile = unzipped.open(f_info)
   # Here's where we buffer:
   logbuffer = cStringIO.StringIO(logfile.read())
   logfile.close()

   for handler in [handler1, handler2]:
      handler(logbuffer)
      # StringIO objects support seek():
      logbuffer.seek(0)

   unzipped.extract(f_info)
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