Pre-pep discussion material: in-place equivalents to map and filter

[Paul Rubin]

arthurhavlicek at gmail.com writes:
> I would gladly appreciate your returns on this, regarding:
> 1 - Whether a similar proposition has been made
> 2 - If you find this of any interest at all
> 3 - If you have a suggestion for improving the proposal

Bleccch.  Might be ok as a behind-the-scenes optimization by the
compiler.  If you want something like C++ move semantics, use C++.