monkey patching __code__

[Sven R. Kunze]

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