Debugpy - Windows

[craempler]

Hello,
I wanted to debug my application on windows with nvim-dap-python. However, I get the following warning message:
The debug adapter did not respond. Either the adapter is slow (then wait and ignore) or there is a problem with your adapter in the 'python' configuration.

Furthermore I get with the cmd DapShowLog the following hint:

[ ERROR ] 2023-09-19T09:22:46Z+0200 ] ...ppData/Local/nvim-data/lazy/nvim-dap/lua/dap/session.lua:1431 ]	"stderr"	{
  command = "C:\\Users\\xxx\\AppData\\Local\\nvim-data\\mason\\bin\\debugpy-adapter.CMD",
  type = "executable"
}	"^C"

However, my configuration works fine on my Linux system. I have now seen in some hints that there are issues with windows.

My configuration is as follows:

return {
  {
    "mfussenegger/nvim-dap",
    optional = true,
    dependencies = {
      "mfussenegger/nvim-dap-python",
      -- stylua: ignore
      keys = {
        { "<leader>dPt", function() require('dap-python').test_method() end, desc = "Debug Method" },
        { "<leader>dPc", function() require('dap-python').test_class() end, desc = "Debug Class" }
      },
      config = function()
        local path = require('mason-registry').get_package('debugpy'):get_install_path()
        if vim.loop.os_uname().sysname:find("Windows") then
          require("dap-python").setup(path .. "dap-python" .. "python")
        else
          require("dap-python").setup(path .. "/venv/bin/python")
        end
      end,
    },
  },
}

Additionally, I use LazyVim framework. My guess is at the path. However, when I print the path in the setup method, I get the correct path. Can someone help me here?
If you need more information, please contact me.

Thanks in advance.

[xpxz]

I have the same problem

[xpxz]

If I use the config from here, it can debug normally, it should be a bug in nvim-dap-python

https://github.com/mfussenegger/nvim-dap/wiki/Debug-Adapter-installation#python

my config

return {
   {
    "jay-babu/mason-nvim-dap.nvim",
    config = function(_, opts)
      require("mason-nvim-dap").setup(opts)
      local dap = require("dap")
      dap.adapters.python = function(cb, config)
        if config.request == "attach" then
          ---@diagnostic disable-next-line: undefined-field
          local port = (config.connect or config).port
          ---@diagnostic disable-next-line: undefined-field
          local host = (config.connect or config).host or "127.0.0.1"
          cb({
            type = "server",
            port = assert(port, "`connect.port` is required for a python `attach` configuration"),
            host = host,
            options = {
              source_filetype = "python",
            },
          })
        else
          cb({
            type = "executable",
            command = "C:\\Users\\Administrator\\AppData\\Local\\Programs\\Python\\Python311\\pythonw.exe",
            args = { "-m", "debugpy.adapter" },
            options = {
              source_filetype = "python",
            },
          })
        end
      end
      dap.configurations.python = {
        {
          -- The first three options are required by nvim-dap
          type = "python", -- the type here established the link to the adapter definition: `dap.adapters.python`
          request = "launch",
          name = "Launch file",

          -- Options below are for debugpy, see https://github.com/microsoft/debugpy/wiki/Debug-configuration-settings for supported options

          program = "${file}", -- This configuration will launch the current file if used.
          pythonPath = function()
            -- debugpy supports launching an application with a different interpreter then the one used to launch debugpy itself.
            -- The code below looks for a `venv` or `.venv` folder in the current directly and uses the python within.
            -- You could adapt this - to for example use the `VIRTUAL_ENV` environment variable.
            local cwd = vim.fn.getcwd()
            if vim.fn.executable(cwd .. "/venv/Scripts/pythonw.exe") == 1 then
              return cwd .. "/venv/Scripts/pythonw.exe"
            elseif vim.fn.executable(cwd .. "/.venv/Scripts/pythonw.exe") == 1 then
              return cwd .. "/.venv/Scripts/pythonw.exe"
            else
              return "C:\\Users\\Administrator\\AppData\\Local\\Programs\\Python\\Python311\\pythonw.exe"
            end
          end,
        },
      }
    end,
  },

}

[Adam K.]

If I use the config from here, it can debug normally, it should be a bug in nvim-dap-python

https://github.com/mfussenegger/nvim-dap/wiki/Debug-Adapter-installation#python

my config

return {
   {
    "jay-babu/mason-nvim-dap.nvim",
    config = function(_, opts)
      require("mason-nvim-dap").setup(opts)
      local dap = require("dap")
      dap.adapters.python = function(cb, config)
        if config.request == "attach" then
          ---@diagnostic disable-next-line: undefined-field
          local port = (config.connect or config).port
          ---@diagnostic disable-next-line: undefined-field
          local host = (config.connect or config).host or "127.0.0.1"
          cb({
            type = "server",
            port = assert(port, "`connect.port` is required for a python `attach` configuration"),
            host = host,
            options = {
              source_filetype = "python",
            },
          })
        else
          cb({
            type = "executable",
            command = "C:\\Users\\Administrator\\AppData\\Local\\Programs\\Python\\Python311\\pythonw.exe",
            args = { "-m", "debugpy.adapter" },
            options = {
              source_filetype = "python",
            },
          })
        end
      end
      dap.configurations.python = {
        {
          -- The first three options are required by nvim-dap
          type = "python", -- the type here established the link to the adapter definition: `dap.adapters.python`
          request = "launch",
          name = "Launch file",

          -- Options below are for debugpy, see https://github.com/microsoft/debugpy/wiki/Debug-configuration-settings for supported options

          program = "${file}", -- This configuration will launch the current file if used.
          pythonPath = function()
            -- debugpy supports launching an application with a different interpreter then the one used to launch debugpy itself.
            -- The code below looks for a `venv` or `.venv` folder in the current directly and uses the python within.
            -- You could adapt this - to for example use the `VIRTUAL_ENV` environment variable.
            local cwd = vim.fn.getcwd()
            if vim.fn.executable(cwd .. "/venv/Scripts/pythonw.exe") == 1 then
              return cwd .. "/venv/Scripts/pythonw.exe"
            elseif vim.fn.executable(cwd .. "/.venv/Scripts/pythonw.exe") == 1 then
              return cwd .. "/.venv/Scripts/pythonw.exe"
            else
              return "C:\\Users\\Administrator\\AppData\\Local\\Programs\\Python\\Python311\\pythonw.exe"
            end
          end,
        },
      }
    end,
  },

}

Using this config, and changing the paths to reflect my local machine resulted in being able to debug normally, without any external shell window from opening up. Thank YOU

[nlahmi]

Just ran into this issue as well. @akthe-at 's response helped point me in the right direction, but ultimately is not very portable. I managed to solve it with https://github.com/linux-cultist/venv-selector.nvim , just make sure to enable the dap_enabled option (and to activate a venv before debugging your code)