demoing global override and comms

shark.py

thing = "foo"


class Baz():
    def override_thing(self):
        global thing
        thing = 1

    def update_thing(self):
        global thing
        thing += 1

    def read_thing(self):
        global thing
        return thing


baz = Baz()
baz2 = Baz()
print thing
baz.override_thing()
print thing
baz.update_thing()
print thing
print baz.read_thing()
print baz2.read_thing()

$ python ~/Desktop/shark.py
foo
1
2
2
2