has_method

John Lenton john at grulic.org.ar
Tue Aug 31 23:24:42 CEST 2004


On Tue, Aug 31, 2004 at 03:13:23PM +0200, Gandalf wrote:
> 
>  Hi All!
> 
> Does anyone knows how to tell if an object has a method with a given 
> name? How can I access that method?
> 
> For attributes, it is easy:
> 
> class A(object):
>    a = 12
>    b = 'Python'
> 
> a = A()
> a.__dict__.has_key('a')   # True
> a.__dict__.has_key('b')   # True
> a.__dict__.has_key('c')   # False
> 
> But it won't work for methods. Thanks in advance.

try this:

    method = getattr(a, 'a', None)
    if callable(method):
        method(args)


also consider using getattr with a default, or just plain hasattr,
instead of accessing the dict directly. Accessing __dict__ like that
is a bad idea with few exceptions.


-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Writing is turning one's worst moments into money.
		-- J.P. Donleavy
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 196 bytes
Desc: Digital signature
URL: <http://mail.python.org/pipermail/python-list/attachments/20040831/717dd770/attachment.pgp>


More information about the Python-list mailing list