A programmer-defined exception class. : Exception Class « Exception « Python

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Python » Exception » Exception ClassScreenshots 
A programmer-defined exception class.
A programmer-defined exception class.

import math

class NegativeNumberErrorArithmeticError ):
   pass

def squareRootnumber ):
   if number < 0:
      raise NegativeNumberError, "Square root of negative number not permitted"
   return math.sqrtnumber )

while 1:
   try:
      userValue = floatraw_input"\nPlease enter a number: " ) )
      print squareRootuserValue )
   float raises ValueError if input is not numerical
   except ValueError:
      print "The entered value is not a number"
   # squareRoot raises NegativeNumberError if number is negative
   except NegativeNumberError, exception:
      print exception
   else:
      break

           
       
Related examples in the same category
1. User-defined Exceptions: Name their own exceptions by creating a new exception classUser-defined Exceptions: Name their own exceptions by creating a new exception class
2. Create a base class for exceptions defined by a module
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