[Python-ideas] object construction (was: Re: ML Style Pattern Matching for Python)

Mart Sõmermaa mrts.pydev at gmail.com
Sat Jan 1 13:57:12 CET 2011

On Sun, Dec 19, 2010 at 9:44 PM, spir <denis.spir at gmail.com> wrote:
> I find those loads of "self.x=x" in constructors sooo stupid --I want the machine to do it for me. __init__ should only define the essential part of obj construction; while the final constructor would do some mechanical job in addition.

Automating that is quite easy with keyword arguments:

>>> class Foo(object):
...     def __init__(self, **kwargs):
...             self.__dict__.update(kwargs)
>>> f = Foo(a=1, b=2)
>>> f.a
>>> f.b

If you want to play safe, filter out keys that start with '__'.

Best regards and a happy new year!
Mart Sõmermaa

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