Felipe Ochoa wrote:
> I need to create a subclass from a parent class that has lots of
> methods, and need to decorate all of these. Is there pythonic way of
> doing this other than:
>
> def myDecorator (meth):
> @wraps(meth)
> def newMeth (*args, **kw):
> print("Changing some arguments here.")
> return meth(newargs, **kw)
> return newMeth
>
> class Parent:
> def method1(self,args):
> pass
> def method2(self,args):
> # and so on...
> def methodn(self,args):
> pass
>
> class Mine(Parent):
> for thing in dir(Parent):
> if type(eval("Parent."+thing)) == type(Parent.method1):
> eval(thing) = myDecorator(eval("Parent." + thing))
>
> I'm not even sure that this works! Thanks a lot!
It's not working, you can't assign to something eval'ed.
There are various options here, including metaclasses, but I think the
simplest is to write a simple function:
def decorate_methods(subclass):
for name in dir(subclass):
thing = getattr(subclass, name)
if isinstance(thing, types.MethodType):
setattr(subclass, name, myDecorator(thing)) # maybe
myDecorator(thing.im_func) is better here
Simply invoke that function with "Mine" - or use a metaclass to do that
implicitly.
Diez
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