Working on manager

core/manager.py

@@ -0,0 +1,32 @@
+from state.base import State
+from uuid import UUID
+
+
+class Manager:
+    def __init__(self, state: State):
+        self._state = state
+        bottom = self._state.create_node()
+        bottom_id = self._state.create_nodevalue(str(bottom))
+        bottom_label = self._state.create_nodevalue("Bottom")
+        to_uuid = self._state.create_edge(self._state.read_root(), bottom_id)
+        to_label = self._state.create_edge(self._state.read_root(), bottom_label)
+        self._state.create_edge(to_label, bottom_id)
+        self._state.create_edge(to_uuid, bottom_label)
+
+    @property
+    def models(self):
+        root = self._state.read_root()
+        for key in self._state.read_dict_keys(root):
+            try:
+                UUID(key)  # checks whether the key is a valid UUID
+                name_node = self._state.read_dict(root, key)
+                name = self._state.read_value(name_node)
+                yield key, name
+            except ValueError:
+                pass
+
+
+if __name__ == '__main__':
+    from state.devstate import DevState
+    m = Manager(DevState())
+    print(list(m.models))