title: python is operator is working unexpectedly
body: <pre><code>&gt;&gt;&gt; a = 257
  &gt;&gt;&gt; b = 257
  &gt;&gt;&gt; a is b
  False
  </code></pre>
  
  <p>the above code is working as expected in python shell</p>
  
  <pre><code>a = 257
  b = 257
  print(a is b)
  True
  </code></pre>
  
  <p>the above is the output that prints on a python file</p>