Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Chris Angelico <rosuav@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: how to get names of attributes
Date: Thu, 31 Dec 2015 00:45:05 +1100
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On Thu, Dec 31, 2015 at 12:31 AM, Charles T. Smith
<cts.private.yahoo@gmail.com> wrote:
> Okay, thank you.  I'm trying to understand your program.
>
> Unfortunately, I haven't gotten the same output you had, using python 2.6
> or 2.7.  Maybe I haven't been able to restore the indentation correctly
> after having been filtered through pan(1).
>
> I wonder what the difference is between vars() and items()

What I sent you was a log of interactive Python, so there are prompts
and continuation prompts. Here's a script version of the same thing
(running under CPython 2.7):

class X: pass

class Y(X): pass

class Z(Y): pass

X.x=1
Y.y=2
Z.z=3
inst=Z()
inst.i=4
def class_vars(old_style_class):
    v = {}
    for cls in old_style_class.__bases__:
        v.update(class_vars(cls))
    v.update(vars(old_style_class))
    return v

def all_vars(old_style_inst):
    v = class_vars(old_style_inst.__class__)
    v.update(vars(old_style_inst))
    return v

print(all_vars(inst))
# {'i': 4, '__module__': '__main__', 'y': 2, 'x': 1, 'z': 3, '__doc__': None}

Does that work better?

ChrisA