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When I suspend python with ctrl+Z and try to get it back with fg, I cannot use the python interactive command prompt anymore. Pressing the Enter key produces ^M on the screen, Esc produces ^[ and even ctrl+C doesn't work (it just displays ^C). I have to use ctrl+Z again and kill %1.

Any guesses as to what's wrong?

I'm using zsh with iTerm2 on MacOS Catalina.

I've included a screenie below.

enter image description here

P.S. I know cross-posting is frowned upon, but I didn't get any responses on StackOverflow so I have copy-pasted my question here. Google has been unhelpful, as I cannot search special characters (such as ^M).

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  • Does this behavior occur with Terminal.app? Commented Jun 1, 2022 at 14:35
  • @MarcWilson Yes it does. Commented Jun 1, 2022 at 14:40
  • It doesn't happen here. Who's python is that? Reaching for straws, if you launch the shell without the custom config, does it still occur? Commented Jun 1, 2022 at 14:48
  • @MarcWilson I removed my ~/.zshrc and the problem went away. Then I narrowed it down to the z plugin. I have commented it out in my .zshrc and it's fine now. I'm not well-versed in shell scripts and unix in general. So I had no idea where to start. Thank you so much for pointing me in the right direction. Commented Jun 2, 2022 at 0:05

2 Answers 2

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You should use precedence percentage symbol % with along with the job number while switching between the foreground and background jobs. Example: fg %1

See the zsh manual

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  • That didn't make a difference. The issue persisted. I've identified the "z" plugin as the culprit though. Commented Jun 2, 2022 at 11:38
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The offender was the z plugin. I commented it out in my ~/.zshrc from plugins = ( ... ) and it got fixed. I wasn't really using that plugin anyway so it's fine. Thank you Marc Wilson for the troubleshooting pointer.

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