fix import error

jhavl · jhavl · commit 1fd97b69db4d · 2024-06-19T17:01:56.000+10:00
diff --git a/roboticstoolbox/robot/ET.py b/roboticstoolbox/robot/ET.py
@@ -29,7 +29,7 @@
 if TYPE_CHECKING:  # pragma: nocover
     import sympy
 
-    Sym = sympy.core.symbol.Symbol
+    Sym = sympy.core.symbol.Symbol  # type: ignore
 else:  # pragma: nocover
     Sym = None
 
