fix(Code Node): Block selected module imports in python code (#15970)

packages/nodes-base/nodes/Code/Pyodide.ts

@@ -28,6 +28,30 @@ export async function LoadPyodide(packageCacheDir: string): Promise<PyodideInter
 		)) as PyodideInterface;
 
 		await pyodideInstance.runPythonAsync(`
+blocked_modules = ["os"]
+
+import sys
+for module_name in blocked_modules:
+	del sys.modules[module_name]
+
+from importlib.abc import MetaPathFinder
+from importlib.machinery import ModuleSpec
+from types import ModuleType
+from typing import Sequence, Optional
+
+class ImportBlocker(MetaPathFinder):
+	def find_spec(
+		self,
+		fullname: str,
+		path: Sequence[bytes | str] | None,
+		target: ModuleType | None = None,
+) -> Optional[ModuleSpec]:
+		if fullname in blocked_modules:
+				raise ModuleNotFoundError(f"Module {fullname!r} is blocked", name=fullname)
+		return None
+
+sys.meta_path.insert(0, ImportBlocker())
+
 from _pyodide_core import jsproxy_typedict
 from js import Object
 `);