This is really just a silly use of decorators to do something vaguely like Ruby's or Smalltalk's blocks:
def collect(sequence): """ Like Ruby's .collect:: >>> @collect([1, 2, 3]) ... def result(item): ... return -item >>> result [-1, -2, -3] """ def decorator(func): return [func(item) for item in sequence] return decorator
Someone must have done this before. But then decorator abuse is still young, so maybe not. I wrote up a few examples: foreach, inject, and file_do. Also a decorator set, which lets you add methods to classes and objects, like:
>>> class color: ... >>> @set(color) ... filter(self, r, g, b): ... return self.__class__(self.r*r, self.g*g, self.b*b)
And then your color class gets a new method filter. It can also add methods to objects, but you have to do @set(color_instance, make_method=True). Hmm... but now that I think that it would be neater if it looked at the name of the first argument to the function, and turned it into a classmethod staticmethod (or did nothing and left it a normal method); or if attaching it to an instance it would bind the class or instance to the first argument. So, magic_set is in there too.