Overwrite __len__ for CommandDefinitions and States (#18)

Author: tetienne

.python-version

@@ -1 +1 @@
-3.6.8
+3.7.8

tahoma_api/models.py

@@ -125,6 +125,9 @@ def __contains__(self, name: str) -> bool:
     def __getitem__(self, command: str) -> Optional[CommandDefinition]:
         return next((cd for cd in self._commands if cd.command_name == command), None)
 
+    def __len__(self) -> int:
+        return len(self._commands)
+
     get = __getitem__
 
 
@@ -150,6 +153,9 @@ def __contains__(self, name: str) -> bool:
     def __getitem__(self, name: str) -> Optional[State]:
         return next((state for state in self._states if state.name == name), None)
 
+    def __len__(self) -> int:
+        return len(self._states)
+
     get = __getitem__