Even better PyEditor offline use case (#2050)

* Even better PyEditor offline use case

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

pyscript.core/src/core.js

@@ -84,6 +84,9 @@ export {
     exportedWhenDefined as whenDefined,
 };
 
+export const offline_interpreter = (config) =>
+    config?.interpreter && new URL(config.interpreter, location.href).href;
+
 const hooked = new Map();
 
 for (const [TYPE, interpreter] of TYPES) {
@@ -294,7 +297,7 @@ for (const [TYPE, interpreter] of TYPES) {
                 interpreter,
                 hooks,
                 env: `${TYPE}-script`,
-                version: config?.interpreter,
+                version: offline_interpreter(config),
                 onerror(error, element) {
                     errors.set(element, error);
                 },