nheritance - Method Calls Consider the following class definitions. For this pro

Question

nheritance - Method Calls

Consider the following class definitions.

For this problem you are to consider which methods are called when the f method is called. Because the classes form part of an inheritance hierarchy, working out what happens will not always be straightforward.

For each of obj1, obj2, obj3, and obj4, print out the methods which will be called following a call to objn.f(). You should print a single line in the format: objn: call1, call2, call3.

So for example, when obj1.f() is called, you should print:

We’ve already done this for you to give you an example.

Note: You don’t need to actually call the methods, you just need to write a print statement, as for obj1.f() above. All you need are the four print statements.

print('obj1: C1.f, C1.g') # C1.f calls C1.g; no superclass methods are called

Explanation / Answer

class C1(): def f(self): return 2*self.g() def g(self): return 2 class C2(C1): def f(self): return 3*self.g() class C3(C1): def g(self): return 5 class C4(C3): def f(self): return 7*self.g() obj1 = C1() obj2 = C2() obj3 = C3() obj4 = C4() print('obj1: C1.f, C1.g') print('obj2: C2.f, C1.g') print('obj3: C1.f, C3.g') print('obj4: C4.f, C3.g')

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