title: Issues from a newbie to Python
body: <p>So I wrote a little script just for practice for converting temperatures.  It worked and then I'm not sure what I did but no matter what I do it always only uses the Fahrenheit part of the if statement. Any help would be greatly appreciated.</p>
  <pre><code>#!/usr/bin/python3
  
  measurement_choice = str(input('Enter either f for Fahrenheit or c for Celsius: '))
  temp = int(input('Enter temperature: ')
  if measurement_choice == 'F' or 'f':
      f2c = (temp - 32) * 5.0/9.0
      print(temp, 'F converts to', f2c, 'C')
  elif measurement_choice == 'C' or 'c':
      c2f = 9.0/5.0 * temp + 32
      print(temp, 'C converts to', c2f, 'F')
  else:
      print('Don\'t be dumb')
  </code></pre>