[Tutor] Listing all of an instances variables

[Karl Pflästerer]

On  8 Okt 2005, matthew.williams at cancer.org.uk wrote:

> Class SomeClass:
>    def __init__(self,a,b):
> 	self.a = a
> 	self.b = b
>
>    def report(self):
> 	for i in dir(self):
> 	    print self.i
>
> <Error Traceback......>
>
>
> This is where I run into problems: How do I return all of the variables
> in an instance?

You can use the `__dict__' method.

>>> class Someclass (object):
    def __init__(self,a,b):
	self.a = a
	self.b = b
    def report(self):
        for k, v in self.__dict__.items():
            print "Variable %s -> %s" % (k, v)

... ... ... ... ... ... ... >>> 
>>> c = Someclass(1,2)
>>> c.report()
Variable a -> 1
Variable b -> 2
>>> c.c = 3
>>> c.report()
Variable a -> 1
Variable c -> 3
Variable b -> 2
>>> 

   Karl
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