title: import command does not give the expected result when executed second time
body: <p>I have been trying to execute the below code snippet in python 3.6 IDLE by executing the below command, it works for the first time and displays the output</p>
  
  <pre><code>import circle
  
  &gt;&gt;&gt; import circle
  Circumference of the circle:  21.99113
  Area of the circle:  153.93791
  &gt;&gt;&gt; import circle
  </code></pre>
  
  <p><code>circle.py</code>:</p>
  
  <pre><code>PI = 3.14159
  r = 7
  print('Circumference of the circle: ', 2 * PI * r)
  print('Area of the circle: ', PI * r * r)
  </code></pre>
  
  <p><strong>Expected:</strong> The output of the file should always be displayed when i import the. file</p>
  
  <p><strong>Actual:</strong> It works for the first time but not again.</p>