human
Here's a good function header given the following:
I wrote the below code

    name = validator.__name__
    doc = validator.__doc__
    def fget(self):
        return self._tls[name]
    def fset(self, val):
        self._tls[name] = validator(self, val)
    def fdel(self):
        self._tls._current.pop(name, None)
    return property(fget, fset, fdel, doc)

What's a good function header?
assistant
#Here's a good function header.

def _validator(validator):