如何在Linux上使用gzip压缩文件并保留时间戳

Question

我在互联网上到处搜索，但是我找不到如何使用python对日志文件进行gzip处理并保留日志文件的时间戳。我看了python提供的gzip函数，但是因为它读取数据然后输出，所以它覆盖了文件的时间戳。我需要它的行为就像对文件运行linuxgzip命令一样。有办法吗？在

try: f_in=open(file,'rb') f_out=gzip.open(file + '.gz','wb') f_out.writelines(f_in) f_out.close() f_in.close() # delete copy that gzip creates during gzip process os.unlink(file) except IOError, e: print "Cant Gzip %s: File not found " % file

Answer 1

如果使用Python2.6，则zlib模块无法调整写入gz文件的mtime。你只剩下两种方法：

• 升级到python2.7，使用stat/fstat获取原始文件的mtime并将其写入gz文件
• 通过subprocess模块使用Linux系统的gzip实用程序。在

Answer 2

来自the documentation：

The mtime argument is an optional numeric timestamp to be written to the stream when compressing. All gzip compressed streams are required to contain a timestamp. If omitted or None, the current time is used. This module ignores the timestamp when decompressing; however, some programs, such as gunzip, make use of it. The format of the timestamp is the same as that of the return value of time.time() and of the st_mtime attribute of the object returned by os.stat().