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I like your take on it compared to pyp at first glance because it uses a clearer API (xargs instead of just wildcard pipe) and a more appropriate name (pypyp is nonsense) even if it has fewer features.

But yeah I didn't know either existed and I wish I did, seems like it could be really useful in the shell

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Thank you! My original use case was for running ffmpeg in directories with encodings that broke xargs, and later added the py/pyev flags which basically swapped subprocess.run() with exec()/print(eval()).

I didn't really highlight it in the documentation but it can also run commands in parallel as multiple windows in a multiplexer so it's easier to checkup on their progress or interact with them.

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