[Tutor] creating a dict-like class - asigning variables... this one may take some thought ; )

[spir]

Le Thu, 28 May 2009 03:47:09 -0700 (PDT),
"John [H2O]" <washakie at gmail.com> s'exprima ainsi:

> 
> Hello, I am trying to create a class to hold and reference things similar to
> matlab's structure.
> 
> ## A class definition to hold things
> class stuff(object):
>     """ holds stuff """
>     def __init__():
>         pass
>     @classmethod
>     def items(cls):
>         stuff = []
>         for i in cls.__dict__:
>             if i[:1] != '_' and i != 'items':
>                 stuff.append((i,cls.__dict__[i]))
>         return stuff
> 
> Then in my code I would like to be able to do the follow:
> 
> s = stuff
> s.cheese = "Brie"
> s.country = "French"
> s.age = 2
> 
> and so on...
> 
> In Ipython, as above it does work. Now here is the tricky part. I'm reading
> in binary data from unformatted Fortan output. My present approach is as
> follows (recommended suggestions welcome):

What you're looking for is a dictionary...
s = {"cheese":"Brie", "country":"France", ...}

Or maybe a kind of object type that works ~ like a dict, but with object syntax (get rid of {} and "" for keys). Example:

class Stuff(object):
	def __iter__(self):
		return iter(self.__dict__.items())
	def items(self):
		return self.__dict__

stuff = Stuff()
stuff.cheese="Brie"
stuff.country="France"
print stuff.cheese, stuff.country
print stuff.items()
for st in stuff:
	print "   ", st
==>
Brie France
{'cheese': 'Brie', 'country': 'France'}
    ('cheese', 'Brie')
    ('country', 'France')


Denis
------
la vita e estrany