Improve isinstance statement

Co-authored-by: Osvaldo A Martin <[email protected]>

Author: AlexAndorra

pymc_bart/bart.py

@@ -55,7 +55,7 @@ def rng_fn(  # pylint: disable=W0237
         if not size:
             size = None
 
-        if isinstance(cls.Y, TensorSharedVariable) or isinstance(cls.Y, TensorVariable):
+        if isinstance(cls.Y, (TensorSharedVariable, TensorVariable)):
             Y = cls.Y.eval()
         else:
             Y = cls.Y