Go Away Python

(lorentz.app)

96 points | by baalimago 4 hours ago ago

39 comments

  • rtpg 2 minutes ago

    You don't even need to end the file in `.go` or the like when using shebangs, and any self-respecting editor will be good at parsing out shebangs to identify file types (... well, Emacs seems to do it well enough for me)

    no need to name your program foo.go when you could just name it foo

  • hamishwhc 2 hours ago

    The author’s point about “not caring about pip vs poetry vs uv” is missing that uv directly supports this use case, including PyPI dependencies, and all you need is uv and your preferred Python version installed: https://docs.astral.sh/uv/guides/scripts/#using-a-shebang-to...

    • meander_water an hour ago

      Actually you can go one better:

        #!/usr/bin/env -S uv run --python 3.14 --script
      
      Then you don't even need python installed. uv will install the version of python you specified and run the command.
      • rikafurude21 26 minutes ago

        alternatively, uv lets you do this:

          #!/usr/bin/env -S uv run --script
          #
          # /// script
          # requires-python = ">=3.12"
          # dependencies = ["foo"]
          # ///
    • benrutter an hour ago

      I thought that too, but I think the tricky bit is if you're a non-python user, this isn't yet obvious.

      If you've never used Clojure and start a Clojure project, you will almost definitely find advice telling you to use Leiningen.

      For Python, if you search online you might find someone saying to use uv, but also potentially venv, poetry or hatch. I definitely think uv is taking over, but its not yet ubiquitous.

      Ironically, I actually had a similar thing installing Go the other day. I'd never used Go before, and installed it using apt only to find that version was too old and I'd done it wrong.

      Although in that case, it was a much quicker resolution than I think anyone fighting with virtual environments would have.

      • idoubtit 21 minutes ago

        That's my experience. I'm not a Python developer, and installing Python programs has been a mess for decades, so I'd rather stay away from the language than try another new tool.

        Over the years, I've used setup.py, pip, pipenv (which kept crashing though it was an official recommendation), manual venv+pip (or virtualenv? I vaguely remember there were 2 similar tools and none was part of a minimal Python install). Does uv work in all of these cases? The uv doc pointed out by the GP is vague about legacy projects, though I've just skimmed through the long page.

        IIRC, Python tools didn't share their data across projects, so they could build the same heavy dependencies multiple times. I've also seen projects with incomplete dependencies (installed through Conda, IIRC) which were a major pain to get working. For many years, the only simple and sane way to run some Python code was in a Docker image, which has its own drawbacks.

        • lexicality 6 minutes ago

          > Does uv work in all of these cases?

          Yes. The goal of uv is to defuck the python ecosystem and they're doing a very good job at it so far.

      • houzi an hour ago

        Do you think a non-python user would piece it together if the shebang line reveals what tool to use?

  • PaulRobinson an hour ago

    Mad genius stuff, this.

    However... scripting requires (in my experience), a different ergonomic to shippable software. I can't quite put my finger on it, but bash feels very scriptable, go feels very shippable, python is somewhere in the middle, ruby is closer to bash, rust is up near go on the shippable end.

    Good scripting is a mixture of OS-level constructs available to me in the syntax I'm in (bash obviously is just using OS commands with syntactic sugar to create conditional, loops and variables), and the kinds of problems where I don't feel I need a whole lot of tooling: LSPs, test coverage, whatever. It's languages that encourage quick, dirty, throwaway code that allows me to get that one-off job done the guy in sales needs on a Thursday so we can close the month out.

    Go doesn't feel like that. If I'm building something in Go I want to bring tests along for the ride, I want to build a proper build pipeline somewhere, I want a release process.

    I don't think I've thought about language ergonomics in this sense quite like this before, I'm curious what others think.

    • dingdingdang an hour ago

      Talking about Python "somewhere in the middle" - I had a demo of a simple webview gtk app I wanted to run on vanilla Debian setup last night.. so I did the canonical-thing-of-the-month and used uv to instantiate a venv and pull the dependencies. Then attempted to run the code.. mayhem. Errors indicating that the right things were in place but that the code still couldn't run (?) and finally Python Core Dumped.. OK. This is (in some shape or form) what happens every single time I give Python a fresh go for an idea. Eventually Golang is more verbose (and I don't particularly like the mod.go system either) but once things compile.. they run. They don't attempt running or require xyz OS specific hack.

      • zelphirkalt 2 minutes ago

        How were the dependencies specified? What kind of files were provided for you to instantiate the venv?

      • logicallee 24 minutes ago

        I haven't had the same issue with anaconda. Give it a try.

        • dns_snek 7 minutes ago

          I've had similar issues with anaconda, once upon a time. I've hit a critical roadblock that ruined my day with every single Python dependency/environment tool except basic venv + requirements.txt, I think. That gets in the way the least but it's also not very helpful, you're stuck with requirements.txt which tends to be error-prone to manage.

  • flufluflufluffy 35 minutes ago

    I don’t really understand the initial impetus. I like scripting in Python. That’s one of the things it’s good at. You can extremely quickly write up a simple script to perform some task, not worrying about types, memory, yada yada yada. I don’t like using Python as the main language for a large application.

    • graemep 2 minutes ago

      It seems to be Linux specific (does it even work on other unix like OSes?) and Linux usually has a system Python which is reasonably stable for things you need scripting for, whereas this requires go to be installed.

      You could also use shell scripting or Python or another scripting language. While Python is not great at backward compatibility most scripts will have very few issues. Shell scripts are backward compatible as are many other scripting languages are very backward compatible (e.g. TCL) and they areG more likely to be preinstalled. If you are installing Go you could just install uv and use Python.

      The article does say "I started this post out mostly trolling" which is part of it, but mostly the motivation would be that you have a strong preference for Go.

  • jas39 6 minutes ago

    May I...

    augroup fix autocmd! autocmd BufWritePost *.go \ if getline(1) =~# '^// usr/bin/' \ | call setline(1, substitute(getline(1), '^// ', '//', '')) \ | silent! write \ | endif augroup END

  • llmslave2 2 hours ago

    I love it. I'm using Go to handle building full stack javascript apps, which actually works great since esbuild can be used directly inside a Go program. The issue is that it's a dependency, so I settled for having a go mod file and running it directly with Go. If somehow these dependencies could be resolved without an explicit module configured (say, it was inline in the go file itself) it would be perfect. Alas, it will probably never happen.

    That being said...use Go for scripting. It's fantastic. If you don't need any third party libraries this approach seems really clean.

    • ahartmetz 2 hours ago

      >full stack

      Device drivers, task switching, filesystem, memory management and all?

      • llmslave2 2 hours ago

        Yes. Yes, I'm doing all of that with Javascript :P

      • mstipetic 2 hours ago

        Don't be that guy.

        • ahartmetz 2 hours ago

          I am going to be that guy.

          I make computers do things, but I never act like my stuff is the only stuff that makes things happen. There is a huge software stack of which my work is just the final pieces.

          • bheadmaster 24 minutes ago

            I agree with you in sentiment - the term "full-stack" is odd and a little too grandiose for its meaning.

            But it is already established in the industry, and fighting it is unlikely to yield any positive outcomes.

          • mstipetic an hour ago

            The term "full stack" has a widely well understood meaning, you're being pedantic

            • SunlitCat an hour ago

              The problem with calling it “full stack” (even if it has a widely understood meaning) is that it implicitly puts the people doing the actual lower-level work on a pedestal. It creates the impression that if this is already “full stack,” then things like device drivers, operating systems, or foundational libraries must be some kind of arcane magic reserved only for experts, which they aren’t.

              The term “full stack” works fine within its usual context, but when viewed more broadly, it becomes misleading and, in my opinion, problematic.

              • ahartmetz 38 minutes ago

                Or, alternatively, it ignores and devalues the existence of these parts. In both cases, it's a weird "othering" of software below a certain line in the, ahem, full stack.

            • ahartmetz an hour ago

              It doesn't for me and I don't think that my subculture of computing uses similarly myopic terms.

              • llmslave2 42 minutes ago

                Where did your subculture come from, Pedanticville?

                • ahartmetz 36 minutes ago

                  Mostly not web-based software, written in compiled languages

  • magicalhippo 2 hours ago

    You can do the same[1] with .Net Core for those of us who like that.

    [1]: https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals...

    • rr808 an hour ago

      dotnet was always really good for this. There were a bunch of third party tools that have done this since the 90s like toolsack.

      I think Java can run uncompiled text scripts now too

  • w4rh4wk5 2 hours ago

    Back in the days, I've seen that with C files, which are compiled on the fly to a temporary file an run.

    Something like //usr/bin/gcc -o main "$0"; ./main "$@"; exit

    • ernst_klim 2 hours ago

      Tcc even supports that with `#!/usr/local/bin/tcc -run`, although I don't understand people who use c or go for "scripting", when python, ruby, TCL or perl have much superior ergonomics.

      • w4rh4wk5 an hour ago

        This was a relatively old project that used a C program as build system / meta generator. All you needed was a working C compiler (and your shell to execute the first line). From there, it built and ran a program that generated various tables and some source code, followed by compiling the actual program. The final program used a runtime reflection system, which was set up by the generated tables and code from the first stage.

        The main reason was to do all this without any dependencies beyond a C compiler and some POSIX standard library.

  • age123456gpg 2 hours ago

    Official stance about supporting interpreter mode for the reference https://github.com/golang/go/issues/24118

  • emersion 43 minutes ago

    The following would probably be more portable:

        ///usr/bin/env go run "$0" "$@"; exit
    
    Note, the exit code isn't passed through due to: https://github.com/golang/go/issues/13440
    • incognito124 13 minutes ago

      To quote the blog in question:

      > How true this is, is a topic I dare not enter.

  • throw-12-16 2 hours ago

    I've been meaning to port some dotfiles utils over to go, I think I'll give this a shot.

  • chrismorgan an hour ago

    One suggestion: change `exit` to `exit $?` so an exit code is passed back to the shell.

  • solumos an hour ago

    > I started this post out mostly trolling, but the more I've thought about it's not a terrible idea.

    I feel like this is the unofficial Go motto, and it almost always ends up being a terrible idea.