擅长:python、mysql、java
<p>Python有<code>__name__</code>:</p>
<pre><code>class MyClass(object):
pass
if __name__ == '__main__':
print("This will only run if you run the script explicitly, not import it")
</code></pre>
<p>如果运行<code>python myscript.py</code>,则<code>print</code>函数将运行。如果从<code>myscript</code>导入<code>MyClass</code>,则{<cd3>}将不会。在</p>