title: python <filename>.py does not pick modified <filename>.py
body: <p>I have modified a file, python doesn't pick the modified file, but program written from the unmodified file.</p>
  
  <p>python -m pdb .py</p>
  
  <pre class="lang-py prettyprint-override"><code>for line in rawContent.spilt('\n'):
          _,jsonStringWithNoRightCurlyBracket=line.split('{')
  </code></pre>
  
  <p>I expect the string to be split.
  The output is as follows.
  AttributeError: 'str' object has no attribute 'spilt'.</p>