擅长:python、mysql、java
<p>是(<a href="https://docs.python.org/dev/library/argparse.html#argparse.ArgumentParser.set_defaults" rel="noreferrer">docs</a>):</p>
<pre><code>>>> parser.parse_args([])
Namespace(foo=None, outformat='smi')
>>> parser.set_defaults(outformat='sdf')
>>> parser.parse_args([])
Namespace(foo=None, outformat='sdf')
</code></pre>