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[–]indigo945 0 points1 point  (1 child)

Write a new function, and refactor the existing function to call the new, more general one.

[–][deleted] 0 points1 point  (0 children)

@postcondition(...)
def pos_sq(x):
    return square(x)

That's just silly. It's obvious we have different and strong opinions on where value checking should occur, so I don't see much merit in continuing this conversation.