How to create an object in python without using init

Asked Jan 24 '17 at 19:03

Active Jan 24 '17 at 19:05

Viewed 47 times

So for this piece of code

class CircleT:

    def __init__(self,x,y,r):
        self.x = x
        self.y = y
        self.r = r

Lets say I want to create a CircleT object named Circle1.

I would just have to do

Circle1 = CircleT(2,4,6)

But if I had this instead

class CircleT:

    def CircleT(self,x,y,r):
        self.x = x
        self.y = y
        self.r = r

How would I go about creating the Circle1 object?

edited Jan 24 '17 at 19:05

kindall

asked Jan 24 '17 at 19:03

Epoch79

as written... `Circle1 = CircleT().CircleT(2, 4, 6)` – Aaron Jan 24 '17 at 19:05
3

That makes `instance` equal to `None` since `CircleT` doesn't return anything. – kindall Jan 24 '17 at 19:06
1

How you'd instantiate the object in the second case is irrelevant, because you'd never write it that way. – kindall Jan 24 '17 at 19:06
Also, the object *is* created, just not initialized. – chepner Jan 24 '17 at 19:08
my bad... call `Circle1 = CircleT(); Circle1.CircleT(2, 4, 6)` – Aaron Jan 24 '17 at 19:08
This question *almost* (but probably inadvertently) hints at the rationale for class methods: to provide alternate constructors for a class. – chepner Jan 24 '17 at 19:09
Just explicitly `return self` in `CircleT` with the first suggestion from @Aaron – cdarke Jan 24 '17 at 19:09
@chepner [relevant](http://stackoverflow.com/a/674369/3220135) there already are class constructors... also [classmethods](https://docs.python.org/2/library/functions.html#classmethod) – Aaron Jan 24 '17 at 19:11
1

@cdarke Yeah thats it, thanks for all the help! – Epoch79 Jan 24 '17 at 19:20

How to create an object in python without using __init__