monkey patching __code__
Sven R. Kunze
srkunze at mail.de
Fri Mar 18 10:42:01 EDT 2016
On 18.03.2016 15:33, Sven R. Kunze wrote:
> On 18.03.2016 15:23, Ian Kelly wrote:
>> On Fri, Mar 18, 2016 at 7:47 AM, Ian Kelly <ian.g.kelly at gmail.com>
>> wrote:
>>> Your patched version takes two extra arguments. Did you add the
>>> defaults for those to the function's __defaults__ attribute?
>> And as an afterthought, you'll likely need to replace the function's
>> __globals__ with your own as well.
def f(a, b=None, c=None):
print(a, b, c)
def f_patch(a, b=None, c=None, d=None, e=None):
print(a, b, c, d, e)
f.__code__ = f_patch.__code__
f.__defaults__ = f_patch.__defaults__
f.__kwdefaults__ = f_patch.__kwdefaults__
f.__globals__ = f_patch.__globals__ <<<<< crashes here with
"AttributeError: readonly attribute"
f('a', e='e')
It seems like we need to work with the globals we have aka. importing
things locally.
Best,
Sven
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