CODEWITHSUNDEEP
pythonclassmethodsattributes
Cam Nguyen
Cam Nguyen

Reputation: 1

Make return of a method/instance become an attribute

I have a class A() include some method:

class A(self):
    def __init__ (self, x1, x2):
        self.x1 = x1
        self.x2 = x2
    def plus(self):
        X3 = self.x1 + self.x2
        return X3

How can I make X3 become an attribute which I can access by "self.X3" to use it for other methods I am a newbie, thanks in advance!

Upvotes: 0

Views: 33

Answers (4)

Alex
Alex

Reputation: 19124

For this example, using a property is probably most appropriate. You can read more about the descriptor protocol (for which properties are syntactic sugar) here.

class A:
    def __init__ (self, x1, x2):
        self.x1 = x1
        self.x2 = x2
    @property
    def X3(self):
        return self.x1 + self.x2

Upvotes: 0

LogCapy
LogCapy

Reputation: 467

class A:
    def __init__ (self, x1, x2):
        self.x1 = x1
        self.x2 = x2
    def plus(self):
        self.X3 = self.x1 + self.x2
        return self.X3

if __name__ == '__main__':
    a = A(1, 2)
    print a.plus()

Give this a try. I got some issues compiling when I tried adding (self) after class A.

Upvotes: 0

Jens
Jens

Reputation: 69495

simply Change X3 = to: self.X3=

class A(self):
    def __init__ (self, x1, x2):
        self.x1 = x1
        self.x2 = x2
    def plus(self):
        self.X3 = self.x1 + self.x2
        return self.X3

Upvotes: 1

jedwards
jedwards

Reputation: 30250

One way would be to simply make X3 an attribute by prepending self.. For example:

class A(self):
    def __init__ (self, x1, x2):
        self.x1 = x1
        self.x2 = x2
    def plus(self):
        self.X3 = self.x1 + self.x2
        return self.X3

I'm not sure it's the best approach, but it's hard to tell based on your question.

Upvotes: 2

Related Questions