Python Method Redefinition

Did you know that you can redefine a method on the same class in Python?

class Foo:
    def x(self):
        print('a')

    def x(self):
        print('b')


foo = Foo()
foo.x()

What do you expect to happen?

If you want to try this at home (for your copy & paste convenience):

cat <<'EOF' > /tmp/foo.py
class Foo:
    def x(self):
        print('a')

    def x(self):
        print('b')


foo = Foo()
foo.x()
EOF

python /tmp/foo.py
pip install mypy
mypy /tmp/foo.py

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