Hypermodern Python

Re:Hypermodern Python by zxexz on Thursday May 28, 2020 @11:21AM (#23338373)

jq has been a lifesaver for me parsing json in bash. Of course, it's an external utility not present by default in most systems.

Another thing to consider is more of a middle-ground approach. Most systems do have a python interpreter, so you can use a lot of base python without worrying about dependency hell. I use inline python in bash all the time, e.g.

  ls | python -c 'import sys,json;lines=sys.stdin.read();print(json.dumps(list(filter(bool,lines.split("\n"))),sort_keys=True,indent=2))'

You can even use variable substitution, if you surround the python code in double quotes. Even mix f-strings and bash substitution

  python -c "print(f'Congrats, ${USER}, you are visitor number ${RANDOM}. This is {__name__}, running in $(pwd)')"

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Re:Hypermodern Python by kbenson on Thursday May 28, 2020 @12:55PM (#23339555)

Or use a heredoc to not worry about competing quote chars:

  # python << EOPYTHON
  print("Congrats, ${USER}")
  print("You are visitor ${RANDOM}")
  print("This is {__name__}, running in ${pwd}")
  print("It's a heredoc to allow both quote characters")
  EOPYTHON

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Re:Hypermodern Python by moreaccountspls on Thursday May 28, 2020 @11:31AM (#23338469)

Great trick with using the python standard lib! Thanks for posting that.

edit: You probably already know this, but for anyone reading along, piping `ls` is unsafe if you plan to use the paths for anything except for printing them out. A path on linux can contain any byte except for NULL, so when `ls` prints them out, you can get broken behavior if you try to break on newlines.

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