擅长:python、mysql、java
<p>散列随机化是<a href="https://docs.python.org/3/using/cmdline.html#cmdoption-R" rel="noreferrer">turned on by default in Python 3</a>。这是一个安全功能:</p>
<blockquote>
<p>Hash randomization is intended to provide protection against a denial-of-service caused by carefully-chosen inputs that exploit the worst case performance of a dict construction</p>
</blockquote>
<p>在2.6.8的早期版本中,可以在命令行中使用-R或<a href="https://docs.python.org/3/using/cmdline.html#envvar-PYTHONHASHSEED" rel="noreferrer">PYTHONHASHSEED</a>环境选项打开它。</p>
<p>您可以通过将<code>PYTHONHASHSEED</code>设置为零来关闭它。</p>