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Editorial Team
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Asked: 2026-05-16T16:42:58+00:00

I am using this simple example to understand Python’s getattr function: In [25]: class

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I am using this simple example to understand Python’s getattr function:

In [25]: class Foo:
   ....:     def __getattr__(self, name):
   ....:         print name
   ....:         
   ....:         

In [26]: f = Foo()

In [27]: f.bar
bar
bar

Why is bar printed twice? Using Python 2.6.5.

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1 Answer

  1. Editorial Team

    I think it’s due to IPython.

    To “fix” it, you have to disable autocall: %autocall 0

    It’s an inevitable side-effect of
    %autocall: since it has to analyze the
    object in the command line to see if
    it’s callable, python triggers getattr
    calls on it.

    Source: http://mail.scipy.org/pipermail/ipython-user/2008-June/005562.html

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