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How to iterate over an instance object's data attributes in Python

Date: 2008-09-07  |   Tags: python   |   1 Comment

To list the attributes of a Python instance object, I could use the built-in dir() function, however, this will return the instance object's methods as well data attributes. To get just the data attributes, I can use the instance object's __dict__ attribute:

class A(object):
    def __init__(self):
        self.myinstatt1 = 'one'
        self.myinstatt2 = 'two'
    def mymethod(self):
        pass

a = A()
for attr, value in a.__dict__.iteritems():
    print attr, value
Results: 
myinstatt2 two
myinstatt1 one

1 Comment — feed icon Comments feed for this post


#1 Dave commented on 2010-07-30:

I just tried _ _ dict _ _ (take out spaces) on a Django entity and got an error "'str' object has no attribute '_meta'". Guess I'll keep looking for a way to iterate database fields only for my Django entity?

-- Trindaz/Python on Fedang

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