Python setter

class Person:
    def __init__(self, first):
        self._first = first

    @property
    def first(self):
        return self._first

    @first.setter
    def first(self, first_name):
        self._first = first_name.strip().capitalize()

    @first.deleter
    def first(self):
        del self._first



# Using the syntax we have seen.
class C:
    def __init__(self):
        self._x = None

    @property
    def x(self):
        """I'm the 'x' property."""
        return self._x

    @x.setter
    def x(self, value):
        self._x = value

    @x.deleter
    def x(self):
        del self._x