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devel / comp.lang.python / Re: Why doc call `__init__` as a method rather than function?

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* Why doc call `__init__` as a method rather than function?scruel tao
`- Re: Why doc call `__init__` as a method rather than function?Stefan Ram

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Why doc call `__init__` as a method rather than function?

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 by: scruel tao - Fri, 15 Sep 2023 10:49 UTC

```python
>>> class A:
.... def __init__(self):
.... pass
....
>>> A.__init__
<function A.__init__ at 0x0000026CFC5CCEE0>
>>> a = A()
>>> a.__init__
<bound method A.__init__ of <__main__.A object at 0x0000026CFC1BB400>>
```

On many books and even the official documents, it seems that many authors prefer to call `__init__` as a "method" rather than a "function".
The book PYTHON CRASH COURSE mentioned that "A function that’s part of a class is a method.", however, ` A.__init__` tells that `__init__` is a function...

I wonder how can I call `__init__` as? Consider the output above.
Maybe both are OK? If you prefer or think that we must use one of the two, please explain the why, I really want to know, thanks!

Re: Why doc call `__init__` as a method rather than function?

<methods-20230915133118@ram.dialup.fu-berlin.de>

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From: ram...@zedat.fu-berlin.de (Stefan Ram)
Newsgroups: comp.lang.python
Subject: Re: Why doc call `__init__` as a method rather than function?
Date: 15 Sep 2023 12:42:13 GMT
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 by: Stefan Ram - Fri, 15 Sep 2023 12:42 UTC

scruel tao <scruelt@hotmail.com> writes:
>The book PYTHON CRASH COURSE

I suggest to read "The Python Language Reference" (the "PRL")
by "Guido van Rossum and the Python development team" for
terminological questions.

>I wonder how can I call `__init__` as?

The PRL usually refers to the value of an object's __init__
attribute as a "method".

A method is a function that can be associated with a object
in a special way.

When a function is retrieved from the attribute of an instance,
an instance method object is created (PRL 3.11.1 3.2)
and becomes the value of the expression for the attribute.
This usually applies to "__init__". Methods are based on functions.
The method's __func__ attribute is the original function.
The instance is the method's __self__ attribute.

But when you look at values of __init__, you can find all
kinds of things, like "wrappers":

|>>> object.__init__
|<slot wrapper '__init__' of 'object' objects>

|>>> object().__init__
|<method-wrapper '__init__' of object object at 0x0...>

.

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