tjreedy at udel.edu
Sun Apr 24 23:53:59 CEST 2011
On 4/24/2011 5:21 PM, Ken Seehart wrote:
> Good point, Benjamin. I didn't think of testing on Jython before
> answering. For practical purposes it's a really good idea to test
> obscure features against all potential target platforms.
> In this case, I would argue that**Benjamin's test demonstrates a bug in
Benjamin's 'test' only tested that he could add a new attribute to a
function object, as he did not use the proper 2.x name, func_defaults.
> One could counter by pointing out that the documentation does not
> specify that the __defaults__ attribute is writable.
The 3.x docs, as another pointed out, does so specify. The same was true
in 2.x at least by 2.5
"func_defaults A tuple containing default argument values for those
arguments that have defaults, or None if no arguments have a default
So if the following does not work in Jython 2.5
def f(a=42) :
f.func_defaults = (23,)
then it *does* have a bug with respect to matching the Python 2.5 spec.
Terry Jan Reedy
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