fix: default to python3 and fallback to python

Author: aminya

Diff for: lib/main.js

@@ -62,13 +62,20 @@ class PythonLanguageClient extends AutoLanguageClient {
     if (venvPath) {
       pylsEnvironment.VIRTUAL_ENV = venvPath
     }
-    this.python = replacePipEnvPathVar(atom.config.get("ide-python.python"), venvPath)
+
+    let pythonBin = atom.config.get("ide-python.python") || "python3"
+    if (whichSync(pythonBin, { nothrow: true }) === null) {
+      pythonBin = "python"
+    }
+
+    this.python = replacePipEnvPathVar(pythonBin, venvPath)
 
     let pyls = atom.config.get("ide-python.pyls") || "pylsp"
     // check if it exists
     if (whichSync(pyls, { nothrow: true }) === null) {
       pyls = "pyls"
     }
+
     const childProcess = super.spawn(this.python, ["-m", pyls], {
       cwd: projectPath,
       env: pylsEnvironment,

Diff for: package.json

@@ -96,7 +96,7 @@
       "title": "Python Executable",
       "order": 1,
       "type": "string",
-      "default": "python",
+      "default": "python3",
       "description": "Absolute path of your Python binary. This is used to launch the Python language server. Make sure to install `pyls` for this version of Python. Changes will take effect after a restart of the language server. Use `$PIPENV_PATH/bin/python` if you want to use the pipenv path of your project"
     },
     "pyls": {