Simple Temperature Converter : <p>Can someone tell me what's wrong with this program? </p>

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<pre><code>import sys

def temp_converter_2(degree):
  print("Do you want to convert to Celsius or Fahrenheit? Enter C or F")
  answer = str(sys.stdin.readline())

  if answer == "C":
    converted_value = (degree - 32) * 5/9
  elif answer == "F":
    converted_value = (degree * 9/5) + 32
  else:
    print("That's not C or F")
    converted_value = -99;

  print(converted_value)

def __main__():
  print("Enter temp to convert:")
  temp = int(sys.stdin.readline())
  temp_converter_2(temp)
</code></pre>

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<p>When I run it, I get nothing. I am hoping that it will ask me for input.  What am I missing?</p>

<p>MacBook-Pro-(9):stuff$ python temp_converter_2.py 
MacBook-Pro-(9):stuff$ </p>
