python -- class inherit

#test for class inherit
class A:
    def __init__(self, name, age):
        self.m_name = name;
        self.m_age = age;
        print 'A initialized:%s' %self.m_name;

    def Print(self):
        print "name:%s age:%d" %(self.m_name, self.m_age);

class B(A):
    def __init__(self, name, age, salary):
        A.__init__(self, name, age);
        self.m_salary = salary;
        print 'B initialized:%s\n' %self.m_name;

    def Print(self):
        A.Print(self);
        print "salary:%d\n" %self.m_salary;

class C(A):
    def __init__(self, name, age, marks):
        A.__init__(self, name, age);
        self.m_marks = marks;
        print "C initialized:%s\n" %self.m_name;

    def Print(self):
        A.Print(self);
        print "marks:%d" %self.m_marks;

a = A('andylin', 28);
b = B('andylin02', 29, 15000);
c = C('andylin04', 22, 99);

objs = [a, b, c];

for obj in objs:
    obj.Print();