Python polymorphism trouble

Question

In python, I defined a class 'number'. Now I wish to define a function named 'number' too. (Just like 'int' or 'str' are classes as well as you can use them as functions ('int()' , 'str()') for type conversion). How can I do the same with (my class and function) 'number'?

[Would it be correct to call this as polymorphism?]

Ignacio Vazquez-Abrams · Accepted Answer · 2011-02-14 07:30:44Z

3

class number(object):
    def __init__(self, value)
        self.val = value # or something like that

n = number(2.3)

int() and str() are not functions, they are type constructors. So you need to make your own ~~constructor~~ initializer.

edited Feb 14, 2011 at 7:30

Ignacio Vazquez-Abrams

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answered Feb 14, 2011 at 6:31

Gabi Purcaru

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1 Comment

Ignacio Vazquez-Abrams Over a year ago

Your own initializer, not constructor. The difference is... subtle, and not terribly important until you dig a little deeper.

Rohan Monga · Accepted Answer · 2011-02-14 06:30:34Z

1

what you want are callables. Look at this for more.

answered Feb 14, 2011 at 6:30

Rohan Monga

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