Python: Methods inside a method in a class

Question

import numpy as np

class Y:
    def __init__(self):
        return None

    def f(self,x):
        return x

    def g(self,x):
        return f(x)**2
y=Y()
print y.g(3)

I know the above code will give error, but somehow I want to do the following, is there a modification to do?

__init__ shouldn't return anything. If you want it to do nothing, use pass. — Open AI - Opting Out
– Open AI - Opting Out, Commented Jun 19, 2015 at 23:46
Every function returns something. If the function has a lone return or simply ends with no return statement at all, it returns None by default. Adding a return None to the end of a method that traditionally has no return statement doesn't bother it. — TigerhawkT3
– TigerhawkT3, Commented Jun 19, 2015 at 23:54

TigerhawkT3 · Accepted Answer · 2015-06-19 23:41:27Z

3

The only reason it doesn't work is because you have f(x)**2 instead of self.f(x)**2. Make that change and it'll work perfectly.

answered Jun 19, 2015 at 23:41

TigerhawkT3

49.5k6 gold badges66 silver badges101 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Maltysen · Accepted Answer · 2015-06-19 23:41:29Z

1

Yup. It just takes a simple change. Since f(x) is a method, you need to call it on some object. What you want here is to call it on yourself, so very simply that line becomes:

return self.f(x)**2

answered Jun 19, 2015 at 23:41

Maltysen

1,94617 silver badges18 bronze badges

Collectives™ on Stack Overflow

Python: Methods inside a method in a class

2 Answers 2

Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Related