擅长:python、mysql、java
<p>来自<a href="https://docs.python.org/2/library/gzip.html" rel="nofollow">the documentation</a>:</p>
<blockquote>
<p>The <em>mtime</em> argument is an optional numeric timestamp to be written to the stream when compressing. All <strong>gzip</strong> compressed streams are required to contain a timestamp. If omitted or <code>None</code>, the current time is used. This module ignores the timestamp when decompressing; however, some programs, such as <strong>gunzip</strong>, make use of it. The format of the timestamp is the same as that of the return value of <code>time.time()</code> and of the <code>st_mtime</code> attribute of the object returned by <code>os.stat()</code>.</p>
</blockquote>