tmux (source code) is a terminal multiplexer implementation often used during Python development on Linux and macOS. tmux grants greater control over a programmers's development environment by making it easier to use many shells at once and attaching to both local and remote shell sessions.
Cockpit helps you create the exact pane layout you want for your tmux setup.
There are a slew of "cheat sheets" for tmux out there, here are a few good ones:
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