Yeah. I was really surprised to see this as a feature to be used rather than a gotcha. I've seen it more as gotchas, as in actual bugs introduced because of this behavior, and never as a feature until now. I can see why he thinks it's useful though and, maybe within his specific context, it is. That said, even for his example, I think he would have been better off using https://docs.python.org/3/library/functools.html#functools.c...