1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/tests/methods_changing.py	Mon Nov 28 15:30:52 2016 +0100
     1.3 @@ -0,0 +1,28 @@
     1.4 +class C:
     1.5 +    def f(self):
     1.6 +        return 1
     1.7 +
     1.8 +    def g(self):
     1.9 +        return self.f()
    1.10 +
    1.11 +class D(C):
    1.12 +    pass
    1.13 +
    1.14 +def f():
    1.15 +    return 2
    1.16 +
    1.17 +c = C()
    1.18 +d = D()
    1.19 +
    1.20 +# Invoke a method that calls the default version of f.
    1.21 +
    1.22 +print c.g()                 # 1
    1.23 +print d.g()                 # 1
    1.24 +
    1.25 +# Replace f in C and invoke the method again. For C, f will have changed,
    1.26 +# but for D, f will retain its original value.
    1.27 +
    1.28 +C.f = f
    1.29 +
    1.30 +print c.g()                 # 2
    1.31 +print d.g()                 # 1