title: PyCharm can't find module 'math'
body: <p>My environment PyCharm 4.5 with Python 3.5</p>
  
  <p><a href="https://i.stack.imgur.com/hQ4Sk.png" rel="noreferrer"><img src="https://i.stack.imgur.com/hQ4Sk.png" alt="enter image description here"></a></p>
  
  <p>It can run successfully, but warning that can't find module <code>math</code>, and can't complete the method tips.</p>
  
  <p>I had tried this:</p>
  
  <pre><code>import imp
  imp.find_module('math')
  
  (&lt;_io.BufferedReader name='/usr/local/Cellar/python3/3.5.0/Frameworks/Python.framework/Versions/3.5/lib/python3.5/lib-dynload/math.cpython-35m-darwin.so'&gt;, '/usr/local/Cellar/python3/3.5.0/Frameworks/Python.framework/Versions/3.5/lib/python3.5/lib-dynload/math.cpython-35m-darwin.so', ('.cpython-35m-darwin.so', 'rb', 3))
  </code></pre>
  
  <p>I'm new to Python, I think this is no <code>math.py</code>. How do I resolve it? </p>