In article <[EMAIL PROTECTED]>,
JonathanB <[EMAIL PROTECTED]> wrote:
> I can handle the formatting and changing the variable itself, no
> problem, but how do I get a list of all the variables in a class
> instance? I almost put a list in there called vars and appended all
> the variables to it so I could iterate the list, but this sounds like
> something useful enough that someone has come up with a better way to
> do it than that. It almost looks like self.__dir__() is what I want,
> but that returns methods as well, correct? I only want variables, but
> I can't think of how to do a list comprehension that would remove the
> methods.
For simple cases, the object's __dict__ will probably give you what you
want. By default, that's where an object's instance variables are
stored, and you can just examine the keys, etc:
class Foo(object):
def __init__(self):
self.a = "bar"
self.z = "test"
self.var = 2
foo = Foo()
print foo.__dict__
-> {'a': 'bar', 'var': 2, 'z': 'test'}
However, there are lots of ways to bypass using the __dict__ to hold
attributes. If the class uses any of these techniques, __dict__ either
will not exist or may not be complete. A few of the techniques that
come to mind are:
* custom __getattr__/__setattr__ methods (or __getattribute__ in a new
style class)
* descriptors (http://docs.python.org/ref/descriptors.html)
* using __slots__ in a new style class
Dave
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