class MyClass:

    def __init__(self, somedata):
        print somedata
        self.data = somedata


    def function(self):
        print self.data

    def hey(self, cool):
        self.data = cool
class = MyClass("data1")
class2 = MyClass("unicorn")

class.function()
class.hey("hello")
class.function()

class2.function()

class.hey("yoo")

class2.hey("yaya")

class.function()

class2.function()