idiom for constructor?

[Laszlo Zsolt Nagy]

Mac wrote:

>Is there a nice Python idiom for constructors which would expedite the
>following?
>
>class Foo:
>  def __init__(self, a,b,c,d,...):
>    self.a = a
>    self.b = b
>    self.c = c
>    self.d = d
>    ...
>
>I would like to keep the __init__ parameter list explicit, as is,
>rather than passing in a dictionary, as I want the code to be explicit
>about what arguments it expects... in effect enforcing the right number
>of arguments.
>  
>
I could list the parameter names programatically:

class    A(object):
    def __init__(self,a,b,c,d,e,f,):
        varnames = self.__init__.im_func.func_code.co_varnames
        for varname in varnames[1:7]:
            print varname
   
a = A(1,2,3,4,5,6)

But I could not get their values.