old_contents: #!/usr/bin/python
  
new_contents: #!/usr/bin/python
  
  """
  The assert Statement
  When it encounter an assert statement, Python evaluates  the accompanying expression, 
  Which is hopefully true. If the expression is false, Pyhon raises an AssertionError exception.
  
  assert Expression[, Arguments]
  
  If the assertion fails, Python uses ArgumentExpression as the argument for the AssertionError. 
  AsseerError exceptions can be caught and handled like any other exception using the try-except statement,
  but if not handled, they will teminate the program adnf produce a traceback.
  
  """
  
  def Kelvin2Fahrenheit(Temperature):
      assert (Temperature >= 0), "Colder than absolute zero!"
      return (((Temperature - 273) * 1.8 ) + 32)
  
  print Kelvin2Fahrenheit(273)
  print int(Kelvin2Fahrenheit(505.78))
  print Kelvin2Fahrenheit(-5)
  
  
  """
  Exception
  Syntax:
      try:
          #You do your oprations here.
      except ExceptionI:
          #If the is ExceptionI, then execute this block
      except ExceptionII:
          #If the is ExceptionI, then execute this block
      ......................
      else:
          If there is no exception then execute this block. 
  """     
  
subject: Update 2016-09-19 10h55