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To: python-list@python.org
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: many constructors in a class?
Date: Wed, 14 Aug 2013 18:40:50 -0400
Organization: IISS Elusive Unicorn
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Xref: csiph.com comp.lang.python:52534

On 14 Aug 2013 14:16:31 GMT, climb65 <climb65@laposte.net> declaimed the
following:

>Hello,
>
>here is a small basic question :
>
>Is it possible to have more than one constructor (__init__ function) in a 
>class? For instance, to create an object with 2 different ways? If my 
>memory is good, I think that with C++ it is possible.
>
	Well... Secret Python-Fu -- __init__() is NOT a constructor. The
constructor is __new__(); __init__() is just an initializer of whatever
__new__() creates.


	Ignoring that detail... NO!

	If the goal is to be able to "leave out" some parameters, that is
performed by setting default values for the missing parameters.

	def __init__(self, these, are, mandatory, but=None, this=None, 
								is=None, optional=None):
		self.these = these
		self.are = are
		self.mandatory = mandatory
		if but is None:
			self.but = these + are
		else:
			self.but = but
	#etc.

-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/