Add type hinting to by return value

Author: otherJL0

libtmux/pane.py

@@ -63,7 +63,7 @@ def _info(self):
         attrs = {"pane_id": self._pane_id}
 
         # from https://github.com/serkanyersen/underscore.py
-        def by(val):
+        def by(val) -> bool:
             for key in attrs.keys():
                 try:
                     if attrs[key] != val[key]:

libtmux/session.py

@@ -65,7 +65,7 @@ def _info(self):
 
         attrs = {"session_id": str(self._session_id)}
 
-        def by(val):
+        def by(val) -> bool:
             for key in attrs.keys():
                 try:
                     if attrs[key] != val[key]:

libtmux/window.py

@@ -74,7 +74,7 @@ def _info(self, *args):
         attrs = {"window_id": self._window_id}
 
         # from https://github.com/serkanyersen/underscore.py
-        def by(val):
+        def by(val) -> bool:
             for key in attrs.keys():
                 try:
                     if attrs[key] != val[key]: