title: Python - test whether object is a builtin function
body: <p>Is there a nice way to check whether object o is a builtin Python function?</p>
  
  <p>I know I can use, for example</p>
  
  <pre><code>type(o) == type(pow)
  </code></pre>
  
  <p>because type(pow) is 'builtin_function_or_method'.</p>
  
  <p>But is there some nicer way?</p>