擅长:python、mysql、java
<p>您需要将append更改为“a+”</p>
<p>为了更多的参考
<a href="http://docs.python.org/2/library/functions.html#open" rel="nofollow">http://docs.python.org/2/library/functions.html#open</a></p>
<blockquote>
<p>Modes 'r+', 'w+' and 'a+' open the file for updating (note that 'w+' truncates the file). Append 'b' to the mode to open the file in binary mode, on systems that differentiate between binary and text files; on systems that don’t have this distinction, adding the 'b' has no effect.</p>
</blockquote>