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From: thinke365 on 23 Jan 2010 10:49

for example, i may define a python class:
class A:
def sayHello():
print 'hello'

a = A()
a.attr1 = 'hello'
a.attr2 = 'bb'

b = A()
a.attr2 = 'aa'

how can i know whether an object have an attribute named attr1?

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From: Arnaud Delobelle on 23 Jan 2010 10:56
thinke365 <thinke365(a)gmail.com> writes:

> for example, i may define a python class:
> class A:
> def sayHello():
> print 'hello'
>
> a = A()
> a.attr1 = 'hello'
> a.attr2 = 'bb'
>
> b = A()
> a.attr2 = 'aa'
>
> how can i know whether an object have an attribute named attr1?

hasattr(a, 'attr1')

--
Arnaud
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