I would like to validate data attributes before the object is instantiated
or any changes thereafter. For example, following is a simple Person class
with name and age attributes. I would like to validate whether age is an
integer before it is added/changed in the object's dictionary. I have taken
a simple integer validation example, but it could be something like
DateField validation or X509 certificate validation as well. Following is
my example code:
class Person(object):
def __init__(self,name,age):
self.name = name
self.age = age
def get_age(self):
return self._age
def set_age(self,val):
try:
int(val)
self._age = val
except ValueError:
raise Exception('Invalid value for age')
def del_age(self):
del self._age
age = property(get_age,set_age,del_age)
a = Person('John',6)
b = Person('Johny','Six')
Is this a good approach? Any suggestions for improving the code or
alternative approaches would be helpful.
-- thanks,
neubyr
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