Python continue surprising me.
Is possible verify attribute's value using the annotation @ATTR.setter on set method, too you can modify attribute's return using the annotation @property on get method.
Finalizing this post, is possible with python, override classes' operators like c++.
See the example below. Details in references links.
References:
Is possible verify attribute's value using the annotation @ATTR.setter on set method, too you can modify attribute's return using the annotation @property on get method.
Finalizing this post, is possible with python, override classes' operators like c++.
See the example below. Details in references links.
class Div(object):
def __init__(self, op, di):
self.op = op
self._di = di
# GET di
@property
def di(self):
return self._di
# SET di
@di.setter
def di(self, value):
if (value == 0):
raise ValueError('Invalid value')
else:
self.di = value
# OPERATOR ADD
def __add__(a, b):
x = Div(0, 0)
x.op = a.op + b.op
x._di = a.di + b.di
return x
def __str__(self):
return ("%s/%s") % (self.op, self.di)
x = Div(1,3)
y = Div(2,2)
z = x + y
print(x)
print(y)
print(z)
x.di = 0
Execution's Result:
1/3 2/2 3/5 Traceback (most recent call last): File "/tmp/exemplo1.py", line 38, inx.di = 0 File "/tmp/exemplo1.py", line 15, in di raise ValueError('Invalid value') ValueError: Invalid value
References:
