ERP5Type/component_package,dynamic: implement PEP-0451

for pylint 3 to understand erp5 dynamic modules

product/ERP5Type/dynamic/component_package.py

@@ -222,6 +222,15 @@ class ComponentDynamicPackage(ModuleType):
       if import_lock_held:
         imp.acquire_lock()
 
+  def find_spec(self, name, path=None, target=None):
+    """PEP-0451
+    """
+    assert six.PY3
+    if self.find_module(name, path) is None:
+      return None
+    import importlib.util
+    return importlib.util.spec_from_loader(name, self)
+
   def _getVersionPackage(self, version):
     """
     Get the version package (NAMESPACE.VERSION_version) for the given version

product/ERP5Type/dynamic/dynamic_module.py

@@ -41,6 +41,17 @@ class PackageType(ModuleType):
   """
   __path__ = []
 
+  def __init__(self, name, doc=None):
+    super(PackageType, self).__init__(name=name, doc=doc)
+    if six.PY3:
+      # PEP-0451
+      import importlib.machinery
+      self.__spec__ = importlib.machinery.ModuleSpec(
+        name=self.__name__,
+        loader=None,
+      )
+
+
 class RefManager(dict):
   """
   self[ComponentTool.last_sync] = (HTTP_REQUEST_WEAKSET,