in search of a nicer super ...

[Michele Simionato]

Here is an idea for a nicer syntax in cooperative method calls,
which is not based on Guido's "autosuper" example. This is just a
hack, waiting for a nicer "super" built-in ...

Here is example of usage:

from cooperative import Cooperative

class B(Cooperative):
def print_(self):
print "B",

class C(B):
def print_(self, super):
super.print_() # shortcut for super(C,self).p rint_()
print "C",

class D(C):
def print_(self, super):
super.print_() # shortcut for super(D,self).p rint_()
print "D",

D().print_() # prints BCD

Let me call "cooperativ e methods" methods with a second argument
called "super": then super.method(*a rgs, **kw) acts as a shortcut
for super(cls,self) .method(*args, **kw). This avoids the redundant
repetition of the class in the super object, a thing I always loathed :)

Here is the "cooperativ e" module:

$ cat cooperative.py
import inspect

def second_arg(func ):
args = inspect.getargs pec(func)[0]
if len(args) >= 2: return args[1]

class _Cooperative(ty pe):
def __init__(cls,na me,bases,dic):
for n,func in dic.iteritems() :
if inspect.isfunct ion(func) and second_arg(func ) == "super":
setattr(cls, n, cls.wrap(func))
def wrap(cls, func):
return lambda self, *args, **kw : \
func(self, super(cls, self), *args, **kw)

class Cooperative:
__metaclass__ = _Cooperative

I could make it to work for staticmethods and classmethods, but
I didn't bothered since I wanted to keep the cooperative module
under the twenty lines.

Just my 0.02c,
Michele Simionato