How to see the environment of a process by PID on Linux? (penv alias)

[anki-code]

How to see the environment of a process by PID (penv)?

[anki-code]

@aliases.register
def _penv(args):
    cat f'/proc/{args[0]}/environ' | tr '\0' '\n'

Handy when debugging daemons, sandboxes, systemd units:

penv 12345