| | | 11.5.1.Operator Overloading: add, sub, mul, div |
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__add__ : Implements the plus "+" operator.
__sub__ : Implements the minus "-" operator.
__mul__ : Implements the multiplication "*" operator.
__div__ : Implements the division "/" operator.
class Double(object) :
def __init__(self) :
self.value = 0
def __add__(self, value) :
return self.value + 2 * value
def __sub__(self, value) :
return self.value - 2 * value
def __mul__(self, value) :
return self.value * (2*value)
def __div__(self, value) :
return self.value / (2*value)
def __cmp__(self, value) :
if self.value < (value*2) :
return -1
elif self.value == value*2 :
return 0
else :
return 1
d = Double()
d.value = 10
print d + 2
print d - 2
print d * 2
print d / 1
if d < 5 : print "Less than 5"
else : print "Not less than 5"
d.value = 10
if d == 5 :
print "Yes!"
else :
print "no..."
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