Hi!
I've asked Google, but have not found any useful information there.
Situation: I have a base class, say
>>> class base(object):
ImportantClassAttribute = None
Now, I want to dynamically generate subclasses of base. That's not a
problem. However, I very much want those subclasses to have individual
doc-strings. More precicely, I want that important class attribute to be
reflected in the doc-string. That's the problem. The only way I've
managed to accomplish that is something like the following.
>>> ImportantClassAttribute = 7
>>> docString = 'The case %s.' % (ImportantClassAttribute,)
>>> exec('''class new(base):
"""%s"""
pass ''' % (docString,))
>>> new.ImportantClassAttribute = ImportantClassAttribute
>>> new.__doc__
'The case 7.'
This works as intended. The subclasses do get the doc-strings I want
them to have, and I can live with this solution. But: This solution does
not strike me as especially beautiful or readable. My first naïve
attempt was instead the following.
>>> class new(base):
pass
>>> new.ImportantClassAttribute = 7
>>> new.__doc__ = ('The case %(ImportantClassAttribute)s.'
% new.__dict__)
Traceback (most recent call last):
File "<pyshell#35>", line 1, in -toplevel-
new.__doc__ = ('The case %(ImportantClassAttribute)s.'
TypeError: attribute '__doc__' of 'type' objects is not writable
This is readable to me, but apparently not the way to go, since I'm not
allowed to replace the doc-string like this. I've also tried a number of
other ways, but they all stumble on similar reasons.
Any ideas? Am I stuck with the clumsy exec-solution, or are there other
ways to dynamically generate doc-strings of classes?
/MiO
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