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class base:
        def __init__(self, name):
                self.name = name

        def show(self):
                print "Base Class is here!!"

        def show_name(self):
                print "name:", self.name

        def process(self):
                self.show_name()
                self.show()

class sub(base):
        def show(self):   // override show method
                print "Sub class is here!!"

base_class = base("Base Class")
base_class.process()

sub_class = sub("Sub Class")
sub_class.process()