title: Python3. ImportError: no module named 'myfile'
body: <pre><code>iMac-Mark:~ Mark$ python3
  Python 3.3.2 (v3.3.2:d047928ae3f6, May 13 2013, 13:52:24) 
  [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import myfile
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: No module named 'myfile'
  </code></pre>
  
  <p>I am new to Python and programming in general. I read a bit about <code>sys.path</code>, <code>__PATH__</code> but I didn't understand anything.</p>