refactor(mixin): add DynamicalSystem variable initialization

oujago · oujago · commit ab53c37ffbbd · 2025-10-07T17:30:31.000+08:00
diff --git a/brainpy/mixin.py b/brainpy/mixin.py
@@ -21,7 +21,7 @@
 
 import brainstate
 
-bm, delay_identifier, init_delay_by_return = None, None, None
+bm, delay_identifier, init_delay_by_return, DynamicalSystem = None, None, None, None
 
 __all__ = [
     'MixIn',
