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Re: Should one always add super().__init__() to the __init__?

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On Sat, Sep 29, 2012 at 1:17 PM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
> No. Only add code that works and that you need. Arbitrarily adding calls
> to the superclasses "just in case" may not work:
>
>
>
> py> class Spam(object):
> ...     def __init__(self, x):
> ...             self.x = x
> ...             super(Spam, self).__init__(x)
> ...
> py> x = Spam(1)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<stdin>", line 4, in __init__
> TypeError: object.__init__() takes no parameters

That's a good thing. We've gone from code that doesn't call the
initializer and leaves the object in a potentially invalid state
(silently!), to code that calls the initializer and then fails
(loudly).

-- Devin

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Should one always add super().__init__() to the __init__? Ramchandra Apte <maniandram01@gmail.com> - 2012-09-29 06:27 -0700
  Re: Should one always add super().__init__() to the __init__? Ramchandra Apte <maniandram01@gmail.com> - 2012-09-29 06:28 -0700
  Re: Should one always add super().__init__() to the __init__? Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-29 10:59 -0600
  Re: Should one always add super().__init__() to the __init__? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-29 17:17 +0000
    Re: Should one always add super().__init__() to the __init__? Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-09-29 14:18 -0400
    Re: Should one always add super().__init__() to the __init__? Chris Angelico <rosuav@gmail.com> - 2012-09-30 04:31 +1000
      Re: Should one always add super().__init__() to the __init__? Piet van Oostrum <piet@vanoostrum.org> - 2012-09-29 17:51 -0400
        Re: Should one always add super().__init__() to the __init__? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-30 04:40 +0000
          Re: Should one always add super().__init__() to the __init__? Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-30 00:08 -0600
            Re: Should one always add super().__init__() to the __init__? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-30 09:34 +0000
              Re: Should one always add super().__init__() to the __init__? Manuel Pégourié-Gonnard <mpg@elzevir.fr> - 2012-09-30 14:04 +0200
      Re: Should one always add super().__init__() to the __init__? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-30 04:37 +0000
        Re: Should one always add super().__init__() to the __init__? Chris Angelico <rosuav@gmail.com> - 2012-09-30 14:53 +1000
        Re: Should one always add super().__init__() to the __init__? Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-30 01:13 -0600
    Re: Should one always add super().__init__() to the __init__? Ramchandra Apte <maniandram01@gmail.com> - 2012-09-29 20:14 -0700
      Re: Should one always add super().__init__() to the __init__? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-30 04:23 +0000
        Re: Should one always add super().__init__() to the __init__? Ramchandra Apte <maniandram01@gmail.com> - 2012-09-29 21:55 -0700
          Re: Should one always add super().__init__() to the __init__? Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-30 00:10 -0600

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