Use python3 as the Python path within containers

src/debugging/python/PythonDebugHelper.ts

@@ -101,7 +101,8 @@ export class PythonDebugHelper implements DebugHelper {
             program: debugConfiguration.file || pythonRunTaskOptions.file,
             redirectOutput: debugConfiguration.redirectOutput || true,
             args: args,
-            cwd: '.'
+            cwd: '.',
+            python: 'python3', // This controls what Python path gets used by the launcher to launch the debuggee. In a container we should always use `python3` to launch it.
         };
     }
 

src/tasks/python/PythonExtensionHelper.ts

@@ -36,7 +36,7 @@ export namespace PythonExtensionHelper {
 
     export async function getPythonExtension(): Promise<vscode.Extension<PythonExtensionAPI>> | undefined {
         const pyExtensionId = 'ms-python.python';
-        const minPyExtensionVersion = new semver.SemVer('2020.5.78807');
+        const minPyExtensionVersion = new semver.SemVer('2020.5.78807'); // TODO
 
         const pyExt = vscode.extensions.getExtension(pyExtensionId);
         const button = localize('vscode-docker.tasks.pythonExt.openExtension', 'Open Extension');