fig27_15.py

来自「PERL语言资料 可以用于PERL程序设计」· Python 代码 · 共 40 行

# Fig. 27.15: fig27_15.py
# A simple program that illustrates exceptions.

def getNumber():

   while 1:   # creates infinite loop
      try:
         theNumber = float( raw_input( "Enter a number: " ) )
         return theNumber      
      except ValueError:
         print "Value entered was not a number."
      
def divideNumbersString( x, y ):
   try:
      result = x / y
   except ZeroDivisionError:
      return "Cannot divide by zero!"
   else:
      return "The result of division is: %f" % result

number1 = getNumber()
number2 = getNumber()

print divideNumbersString( number1, number2 )


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