Factory for Struct-like classes

[Larry Bates]

eliben wrote:
> Hello,
> 
> I want to be able to do something like this:
> 
> Employee = Struct(name, salary)
> 
> And then:
> 
> john = Employee('john doe', 34000)
> print john.salary
> 
> Basically, Employee = Struct(name, salary) should be equivalent to:
> 
> class Employee(object):
>   def __init__(self, name, salary):
>     self.name = name
>     self.salary = salary
> 
> Ruby's 'Scruct' class (http://ruby-doc.org/core/classes/Struct.html)
> does this. I suppose it can be done with 'exec', but is there a more
> Pythonic way ?
> 
> Thanks in advance
> 
> P.S.  I'm aware of this common "pattern":
> 
> class Struct:
>     def __init__(self, **entries):
>         self.__dict__.update(entries)
> 
> Which allows:
> 
> john = Struct(name='john doe', salary=34000)
> print john.salary
> 
> But what I'm asking for is somewhat more general.
> 
> 

That's about as "general" as it gets ;-).  It works for any number/type of 
attribute.  I would probably make it a new-style class by subclassing object, 
but for simulating a generic row container, this is quite good.  You might 
extend it with a __str__ method, __len__ method, make it an iterator, etc.
but that is quite easy.

-Larry