Setter is called twice for default values

[smarie]

When an argument is declared as optional with default value in the constructor, everytime it is set by @autoargs the setter is called twice (once with the default value and once with the value provided by the user)

global counter
counter = 0

class Home(object):
    @autoargs
    def __init__(self, foo, bar=False):
        pass

    @property
    def bar(self):
        return self._bar

    @bar.setter
    def bar(self, value):
        global counter
        counter += 1
        self._bar = value

Home(None, bar=True)
assert counter == 1  # AssertionError : counter is 2 !