Fix MyPy errors in Python 3.12 (#455)

Author: sea-bass

docs/examples/blackboard_activity_stream.py

@@ -12,4 +12,5 @@
 writer.foo = "foobar"
 unused_result = reader.foo
 print(py_trees.display.unicode_blackboard_activity_stream())
+assert py_trees.blackboard.Blackboard.activity_stream is not None
 py_trees.blackboard.Blackboard.activity_stream.clear()

docs/examples/blackboard_behaviour.py

@@ -7,7 +7,7 @@
 class Foo(py_trees.behaviour.Behaviour):
     """Example behaviour that reads from and writes to the blackboard."""
 
-    def __init__(self, name):
+    def __init__(self, name: str) -> None:
         """Construct a new behaviour instance and sets up blackboard access."""
         super().__init__(name=name)
         self.blackboard = self.attach_blackboard_client(name="Foo Global")
@@ -25,11 +25,11 @@ def __init__(self, name):
             "number_of_noodles", access=py_trees.common.Access.WRITE
         )
 
-    def initialise(self):
+    def initialise(self) -> None:
         """Initialise blackboard variables based on parameters."""
         self.state.number_of_noodles = self.parameters.init
 
-    def update(self):
+    def update(self) -> py_trees.common.Status:
         """Update blackboard variables as the behaviour ticks."""
         self.state.number_of_noodles += 1
         self.feedback_message = self.state.number_of_noodles

docs/examples/blackboard_disconnected.py

@@ -4,7 +4,7 @@
 import py_trees
 
 
-def check_foo():
+def check_foo() -> None:
     """Read the value of a blackboard variable in a different scope."""
     blackboard = py_trees.blackboard.Client(name="Reader")
     blackboard.register_key(key="foo", access=py_trees.common.Access.READ)

docs/examples/blackboard_nested.py

@@ -7,11 +7,11 @@
 class Nested(object):
     """Simple object that contains a few attributes."""
 
-    def __init__(self):
-        self.foo = None
-        self.bar = None
+    def __init__(self) -> None:
+        self.foo: str | None = None
+        self.bar: str | None = None
 
-    def __str__(self):
+    def __str__(self) -> str:
         return str(self.__dict__)
 
 

docs/examples/decorators.py

@@ -6,7 +6,7 @@
 import py_trees.display
 
 if __name__ == "__main__":
-    root = py_trees.composites.Sequence(name="Life")
+    root = py_trees.composites.Sequence(name="Life", memory=False)
     timeout = py_trees.decorators.Timeout(
         name="Timeout", child=py_trees.behaviours.Success(name="Have a Beer!")
     )

docs/examples/oneshot.py

@@ -5,7 +5,7 @@
 import py_trees
 
 if __name__ == "__main__":
-    sequence = py_trees.composites.Sequence("Sequence")
+    sequence = py_trees.composites.Sequence("Sequence", memory=False)
     guard = py_trees.behaviours.Success(name="Guard")
     a1 = py_trees.behaviours.Success(name="Action 1")
     a2 = py_trees.behaviours.Success(name="Action 2")

docs/examples/parallel.py

@@ -9,9 +9,10 @@
     b2 = py_trees.behaviours.Success(name="B2")
     b3 = py_trees.behaviours.Success(name="B3")
     root = py_trees.composites.Parallel(
+        name="Parallel",
         policy=py_trees.common.ParallelPolicy.SuccessOnSelected(
             synchronise=True, children=[b1, b2]
-        )
+        ),
     )
     root.add_children([b1, b2, b3])
     py_trees.display.render_dot_tree(

docs/examples/pickup_where_you_left_off.py

@@ -22,12 +22,15 @@
         eventually=py_trees.common.Status.SUCCESS,
     )
     high_priority_interrupt = py_trees.decorators.RunningIsFailure(
-        child=py_trees.behaviours.Periodic(name="High Priority", n=3)
+        name="High Priority Interrupt",
+        child=py_trees.behaviours.Periodic(name="High Priority", n=3),
     )
     piwylo = py_trees.idioms.pick_up_where_you_left_off(
         name="Tasks", tasks=[task_one, task_two]
     )
-    root = py_trees.composites.Selector(name="Pick Up\nWhere You\nLeft Off")
+    root = py_trees.composites.Selector(
+        name="Pick Up\nWhere You\nLeft Off", memory=False
+    )
     root.add_children([high_priority_interrupt, piwylo])
     py_trees.display.render_dot_tree(
         root, py_trees.common.string_to_visibility_level("all")

docs/examples/selector.py

@@ -5,7 +5,7 @@
 import py_trees
 
 if __name__ == "__main__":
-    root = py_trees.composites.Selector("Selector")
+    root = py_trees.composites.Selector("Selector", memory=False)
     high = py_trees.behaviours.Success(name="High Priority")
     med = py_trees.behaviours.Success(name="Med Priority")
     low = py_trees.behaviours.Success(name="Low Priority")

docs/examples/sequence.py

@@ -5,7 +5,7 @@
 import py_trees
 
 if __name__ == "__main__":
-    root = py_trees.composites.Sequence("Sequence")
+    root = py_trees.composites.Sequence("Sequence", memory=False)
     guard = py_trees.behaviours.Success(name="Guard")
     a1 = py_trees.behaviours.Success(name="Action 1")
     a2 = py_trees.behaviours.Success(name="Action 2")