Need help downgrading my repl from Python 3.10 back to Python 3.8

Replit Help
1

Hi, as mentioned in the title, I’m trying to downgrade the Python version my replit got automatically updated to. The project makes use of a few packages that have not been updated to Python 3.10.

I’ve tried looking up the solution and even asked chatGPT for help, but I feel like I’m in over my head trying to understand how to downgrade my python version using nix.

I keep running into issues with “prybar-python38 not in $PATH”, but I don’t know what I’m supposed to do with that as I’ve never downgraded before

This is the Repl:

https://replit.com/@LyndenSylver/BotTests

2

Hey, @LyndenSylver welcome to the forums!

Can you please provide a link to the repl? This way it is easier for staff and members of the community to help you!

Also see this guide on how to share your code:

3

Out of curiosity which packages are they?

1 Like
4

Try downgrading using Nix. Find the replit.nix file. If you have trouble locating it, click the three dots and then click Show Hidden Files.

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image1092×634 55.6 KB

1 Like
5

These 2:

  • discord (The discord.py mirror package maintained by Rapptz) Version 2.2.2

  • aiohttp Version 3.8.4

1 Like
6

I already tried downgrading with Nix, but I ran into issues with “prybar-python38 not in $PATH”. I know nothing about Nix, and even with the use of chatGPT to try to explain it to me, I continued to get more confused

7

GPT does not usually understand programming very well. It usually is either buggy, uses bad practices, or sometimes both. Could please provide the current content of your replit.nix file please?

1 Like
8

This is my replit.nix file:

{ pkgs }: {
  deps = [
    pkgs.python310Full
    pkgs.replitPackages.prybar-python310
    pkgs.replitPackages.stderred
  ];
  env = {
    PYTHON_LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [
      # Needed for pandas / numpy
      pkgs.stdenv.cc.cc.lib
      pkgs.zlib
      # Needed for pygame
      pkgs.glib
      # Needed for matplotlib
      pkgs.xorg.libX11
    ];
    PYTHONHOME = "${pkgs.python310Full}";
    PYTHONBIN = "${pkgs.python310Full}/bin/python3.10";
    LANG = "en_US.UTF-8";
    STDERREDBIN = "${pkgs.replitPackages.stderred}/bin/stderred";
    PRYBAR_PYTHON_BIN = "${pkgs.replitPackages.prybar-python310}/bin/prybar-python310";
  };
}
9

Try changing every instance of 310 to 38. I’ll work on providing one in a second.

10

I tried as well as changing the 310s in the .replit file as well to 38s, but I still get the “prybar-python38 not in $PATH”.

11

Try this replit.nix, and provide your current .replit file please?

{ pkgs }: {
  deps = [
    pkgs.python38Full
    pkgs.replitPackages.prybar-python38
    pkgs.replitPackages.stderred
  ];
  env = {
    PYTHON_LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [
      # Needed for pandas / numpy
      pkgs.stdenv.cc.cc.lib
      pkgs.zlib
      # Needed for pygame
      pkgs.glib
      # Needed for matplotlib
      pkgs.xorg.libX11
    ];
    PYTHONHOME = "${pkgs.python38Full}";
    PYTHONBIN = "${pkgs.python38Full}/bin/python3.8";
    LANG = "en_US.UTF-8";
    STDERREDBIN = "${pkgs.replitPackages.stderred}/bin/stderred";
    PRYBAR_PYTHON_BIN = "${pkgs.replitPackages.prybar-python38}/bin/prybar-python38";
  };
}
12

This is the .replit file:

# The command that runs the program. If the interpreter field is set, it will have priority and this run command will do nothing
run = "python3 main.py"

# The primary language of the repl. There can be others, though!
language = "python3"
entrypoint = "main.py"
# A list of globs that specify which files and directories should
# be hidden in the workspace.
hidden = ["venv", ".config", "**/__pycache__", "**/.mypy_cache", "**/*.pyc"]

# Specifies which nix channel to use when building the environment.
[nix]
channel = "stable-22_11"

# The command to start the interpreter.
[interpreter]
  [interpreter.command]
  args = [
    "stderred",
    "--",
    "prybar-python310",
    "-q",
    "--ps1",
    "\u0001\u001b[33m\u0002\u0001\u001b[00m\u0002 ",
    "-i",
  ]
  env = { LD_LIBRARY_PATH = "$PYTHON_LD_LIBRARY_PATH" }

[env]
VIRTUAL_ENV = "/home/runner/${REPL_SLUG}/venv"
PATH = "${VIRTUAL_ENV}/bin"
PYTHONPATH = "$PYTHONHOME/lib/python3.10:${VIRTUAL_ENV}/lib/python3.10/site-packages"
REPLIT_POETRY_PYPI_REPOSITORY = "https://package-proxy.replit.com/pypi/"
MPLBACKEND = "TkAgg"
POETRY_CACHE_DIR = "${HOME}/${REPL_SLUG}/.cache/pypoetry"

# Enable unit tests. This is only supported for a few languages.
[unitTest]
language = "python3"

# Add a debugger!
[debugger]
support = true

  # How to start the debugger.
  [debugger.interactive]
  transport = "localhost:0"
  startCommand = ["dap-python", "main.py"]

    # How to communicate with the debugger.
    [debugger.interactive.integratedAdapter]
    dapTcpAddress = "localhost:0"

    # How to tell the debugger to start a debugging session.
    [debugger.interactive.initializeMessage]
    command = "initialize"
    type = "request"

      [debugger.interactive.initializeMessage.arguments]
      adapterID = "debugpy"
      clientID = "replit"
      clientName = "replit.com"
      columnsStartAt1 = true
      linesStartAt1 = true
      locale = "en-us"
      pathFormat = "path"
      supportsInvalidatedEvent = true
      supportsProgressReporting = true
      supportsRunInTerminalRequest = true
      supportsVariablePaging = true
      supportsVariableType = true

    # How to tell the debugger to start the debuggee application.
    [debugger.interactive.launchMessage]
    command = "attach"
    type = "request"

      [debugger.interactive.launchMessage.arguments]
      logging = {}

# Configures the packager.
[packager]
language = "python3"
ignoredPackages = ["unit_tests"]

  [packager.features]
  enabledForHosting = false
  # Enable searching packages from the sidebar.
  packageSearch = true
  # Enable guessing what packages are needed from the code.
  guessImports = true

# These are the files that need to be preserved when this 
# language template is used as the base language template
# for Python repos imported from GitHub
[gitHubImport]
requiredFiles = [".replit", "replit.nix", ".config", "venv"]

[languages]

[languages.python3]
pattern = "**/*.py"

[languages.python3.languageServer]
start = "pylsp"

[deployment]
run = ["sh", "-c", "python3 main.py"]
13

Try this .replit with the replit.nix I provided before:

# The command that runs the program. If the interpreter field is set, it will have priority and this run command will do nothing
run = "python3 main.py"

# The primary language of the repl. There can be others, though!
language = "python3"
entrypoint = "main.py"
# A list of globs that specify which files and directories should
# be hidden in the workspace.
hidden = ["venv", ".config", "**/__pycache__", "**/.mypy_cache", "**/*.pyc"]

# Specifies which nix channel to use when building the environment.
[nix]
channel = "stable-22_11"

# The command to start the interpreter.
[interpreter]
  [interpreter.command]
  args = [
    "stderred",
    "--",
    "prybar-python38",
    "-q",
    "--ps1",
    "\u0001\u001b[33m\u0002\u0001\u001b[00m\u0002 ",
    "-i",
  ]
  env = { LD_LIBRARY_PATH = "$PYTHON_LD_LIBRARY_PATH" }

[env]
VIRTUAL_ENV = "/home/runner/${REPL_SLUG}/venv"
PATH = "${VIRTUAL_ENV}/bin"
PYTHONPATH = "$PYTHONHOME/lib/python3.8:${VIRTUAL_ENV}/lib/python3.8/site-packages"
REPLIT_POETRY_PYPI_REPOSITORY = "https://package-proxy.replit.com/pypi/"
MPLBACKEND = "TkAgg"
POETRY_CACHE_DIR = "${HOME}/${REPL_SLUG}/.cache/pypoetry"

# Enable unit tests. This is only supported for a few languages.
[unitTest]
language = "python3"

# Add a debugger!
[debugger]
support = true

  # How to start the debugger.
  [debugger.interactive]
  transport = "localhost:0"
  startCommand = ["dap-python", "main.py"]

    # How to communicate with the debugger.
    [debugger.interactive.integratedAdapter]
    dapTcpAddress = "localhost:0"

    # How to tell the debugger to start a debugging session.
    [debugger.interactive.initializeMessage]
    command = "initialize"
    type = "request"

      [debugger.interactive.initializeMessage.arguments]
      adapterID = "debugpy"
      clientID = "replit"
      clientName = "replit.com"
      columnsStartAt1 = true
      linesStartAt1 = true
      locale = "en-us"
      pathFormat = "path"
      supportsInvalidatedEvent = true
      supportsProgressReporting = true
      supportsRunInTerminalRequest = true
      supportsVariablePaging = true
      supportsVariableType = true

    # How to tell the debugger to start the debuggee application.
    [debugger.interactive.launchMessage]
    command = "attach"
    type = "request"

      [debugger.interactive.launchMessage.arguments]
      logging = {}

# Configures the packager.
[packager]
language = "python3"
ignoredPackages = ["unit_tests"]

  [packager.features]
  enabledForHosting = false
  # Enable searching packages from the sidebar.
  packageSearch = true
  # Enable guessing what packages are needed from the code.
  guessImports = true

# These are the files that need to be preserved when this 
# language template is used as the base language template
# for Python repos imported from GitHub
[gitHubImport]
requiredFiles = [".replit", "replit.nix", ".config", "venv"]

[languages]

[languages.python3]
pattern = "**/*.py"

[languages.python3.languageServer]
start = "pylsp"

[deployment]
run = ["sh", "-c", "python3 main.py"]
14

Just tried with your .replit and replit.nix files together, and am still getting “prybar-python38 not found in $PATH”

15

I have a solution:

  1. Fork this repl: https://replit.com/@Firepup650/Python-3812
  2. Upload your code into the new repl

I’m sorry I couldn’t do more than this, but hey! Hopefully it works! :crossed_fingers:

16

I’ll give it a shot. Does make me wonder if Replit will ever add in a way to opt-in/out of language updates instead of auto-updating.

17

I dug through some of my older repls and found one that’s replit.nix file still called python3. 8, so it should work. If it doesn’t work, I have some older non-nix repls that I could try as well.