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Message from discussion dynamically modify help text
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Steven D'Aprano  
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 More options Jun 28 2010, 10:19 pm
Newsgroups: comp.lang.python
From: Steven D'Aprano <steve-REMOVE-T...@cybersource.com.au>
Date: 29 Jun 2010 02:19:34 GMT
Local: Mon, Jun 28 2010 10:19 pm
Subject: Re: dynamically modify help text
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On Tue, 29 Jun 2010 10:37:44 +1000, Ben Finney wrote:
> Brian Blais <bbl...@bryant.edu> writes:

>> On Jun 28, 2010, at 14:25 , Chris Rebert wrote:
>> > __doc__ is normally defined on classes, e.g. `A`, not instances, e.g.
>> > `a`. help() looks for __doc__ accordingly.

>> so that gets back to my original question: can I change this text at
>> runtime.  Doesn't look like I can, because it is defined for classes
>> rather than instances.  Am I thinking about this correctly?

> Classes are objects. You can change the ‘__doc__’ attribute of a class
> object the same as you'd change it for any other object::

>     A.__doc__ = "new docstring"

True, but what you can't do is:

a = A()
a.__doc__ = "new docstring"

unless you jump through hoops with __getattribute__ or descriptors.

--
Steven


 
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