Fix #1899 - Expose pyscript.js_modules as module (#1902)

* Fix #1899 - Expose pyscript.js_modules as module

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* Fix #1899 - Make import as smooth as in polyscript

---------

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

pyscript.core/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@pyscript/core",
-    "version": "0.3.10",
+    "version": "0.3.14",
     "type": "module",
     "description": "PyScript",
     "module": "./index.js",
@@ -42,7 +42,7 @@
     "dependencies": {
         "@ungap/with-resolvers": "^0.1.0",
         "basic-devtools": "^0.1.6",
-        "polyscript": "^0.6.2",
+        "polyscript": "^0.6.8",
         "sticky-module": "^0.1.1",
         "to-json-callback": "^0.1.1",
         "type-checked-collections": "^0.1.7"
@@ -52,7 +52,7 @@
         "@codemirror/lang-python": "^6.1.3",
         "@codemirror/language": "^6.9.3",
         "@codemirror/state": "^6.3.3",
-        "@codemirror/view": "^6.22.1",
+        "@codemirror/view": "^6.22.3",
         "@playwright/test": "^1.40.1",
         "@rollup/plugin-commonjs": "^25.0.7",
         "@rollup/plugin-node-resolve": "^15.2.3",
@@ -61,8 +61,8 @@
         "@xterm/addon-fit": "^0.9.0-beta.1",
         "chokidar": "^3.5.3",
         "codemirror": "^6.0.1",
-        "eslint": "^8.55.0",
-        "rollup": "^4.6.1",
+        "eslint": "^8.56.0",
+        "rollup": "^4.9.1",
         "rollup-plugin-postcss": "^4.0.2",
         "rollup-plugin-string": "^3.0.0",
         "static-handler": "^0.4.3",

pyscript.core/src/stdlib/pyscript/magic_js.py

@@ -1,9 +1,28 @@
+import sys
+
 import js as globalThis
 from polyscript import js_modules
 from pyscript.util import NotSupported
 
 RUNNING_IN_WORKER = not hasattr(globalThis, "document")
 
+
+# allow `from pyscript.js_modules.xxx import yyy`
+class JSModule(object):
+    def __init__(self, name):
+        self.name = name
+
+    def __getattr__(self, field):
+        # avoid pyodide looking for non existent fields
+        if not field.startswith("_"):
+            return getattr(getattr(js_modules, self.name), field)
+
+
+# generate N modules in the system that will proxy the real value
+for name in globalThis.Reflect.ownKeys(js_modules):
+    sys.modules[f"pyscript.js_modules.{name}"] = JSModule(name)
+sys.modules["pyscript.js_modules"] = js_modules
+
 if RUNNING_IN_WORKER:
     import js
     import polyscript