Re: monkey patching code

From	"Sven R. Kunze" <srkunze@mail.de>
Newsgroups	comp.lang.python
Subject	Re: monkey patching __code__
Date	2016-03-18 15:42 +0100
Message-ID	<mailman.324.1458312124.12893.python-list@python.org> (permalink)
References	<56EBEB5A.7050207@mail.de> <CALwzid=XVSnSEt14Oer-2dO-0kT+fLi1EP4mNehXc0+zDqTX=g@mail.gmail.com> <CALwzidkyyQRSDPbthjKi4YDBtGGZe7M8J1LOA5PjzAn+qk8skg@mail.gmail.com> <56EC11BE.1040709@mail.de>

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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@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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Re: monkey patching __code__ "Sven R. Kunze" <srkunze@mail.de> - 2016-03-18 15:42 +0100

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