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  • Worked perfectly for me... I wanted to "massage" the output of 7zip while it was running, but it – seemingly – buffers its output if it is being piped. Using this put it back in "terminal mode" while still allowing the output to be piped. Commented Apr 10, 2020 at 16:37
  • This is the only solution out of many I've tried that both (1) preserves colors (from ANSI escape codes) in piped output, and (2) passes SIGINT (Ctrl+C) to the child process. Thank you! I did have to change the script's shebang to specify python3 to get it working. On my Mac, the default Python installation is Python 2, which produces a "'BrokenPipeError' is not defined" error. Commented Mar 19, 2021 at 3:24
  • Thank you, that seems to just work! (I use fishshell, so I tweaked it from os.execvp(argv[1], argv[1:]) to os.execvp('fish', ('fish',) + tuple([ '-c', ' '.join(argv[1:]) ])) so I can use my autoloading fish functions, and... that seems to work?) (And ubuntu 20.04 also needs a 3 added to the shebang.) (... and of course, you prolly need to mess around with like -r/-R flags when piping into less in order to get as close as possible to what you really want...) Commented Apr 3, 2021 at 12:53
  • If you're going to invoke a shell, you'll just have to remember to do extra escaping if one of the arguments going into python has spaces. Commented Apr 5, 2021 at 5:11
  • @Owen_AR see my edit for specifics. Commented Apr 6, 2021 at 20:47