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class A(object):

def go(self):

print("go A go!")

def stop(self):

print("stop A stop!")

def pause(self):

raise Exception("Not Implemented")

class B(A):

def go(self):

super(B, self).go()

print("go B go!")

class C(A):

def go(self):

super(C, self).go()

print("go C go!")

def stop(self):

super(C, self).stop()

print("stop C stop!")

class D(B,C):

def go(self):

super(D, self).go()

print("go D go!")

def stop(self):

super(D, self).stop()

print("stop D stop!")

def pause(self):

print("wait D wait!")

class E(B,C): pass

a = A()

b = B()

c = C()

d = D()

e = E()

# specify output from here onwards

a.go()

b.go()

c.go()

d.go()

e.go()

a.stop()

b.stop()

c.stop()

d.stop()

e.stop()

a.pause()

b.pause()

c.pause()

d.pause()

e.pause()

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inheritance.py

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inheritance.py

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