#!/usr/local/bin/python
#def divide1(x,y):
#  try:
#    return True,x/y
#  except Exception , e:
#    print e
#    return False,None
#
#x1=5
#y1=0
#x2=2
#y2=1
#success1,result1= divide1(x1,y1)
#if not success1:
#  print "Error"
#else:
#  print result1
#
#success2,result2= divide1(x2,y2)
#if not success2:
#  print "Error"
#else:
#  print result2

def divide(x,y):
  try:
    return x/y
  except ValueError , e:
    raise ValueError('Input value error')

x,y=0,2
try:
  result=divide(x,y)
except ValueError:
  print 'Value error.'
else:
  print result


