Automatic binding of **kwargs to variables

[Steven D'Aprano]

On Fri, 28 Oct 2005 15:49:12 -0700, lbolognini at gmail.com wrote:

> I have a very long list of parameters coming from a web form to my
> method foo(self, **kwargs)
> 
> I would like to avoid manually binding the variables to the values
> coming through the **kwargs dictionary,

That's easy: Just Don't Do It.

Instead of some horribly contorted code converting key,item in kwargs into
self.key = item, just do the simple, obvious thing:

self.kwargs = kwargs

and then access the values with self.kwargs[key].

> just to keep the code cleaner,
> I'd like to bind them automatically

If you are worried about excessive use of quotation marks, you can always
define some constants to use:

NAME = 'name'
EMAIL = 'email'
NUM = 'num'

if self.kwargs[NAME]is None:
    self.kwargs[NAME] = "Anonymous"
 

The benefit of this is that when you change your web form to use "number"
instead of "num", you only have to change your code in one place.


-- 
Steven