Added a helper function to print intermediate values

pymc/model/core.py

@@ -40,6 +40,7 @@
 from pytensor.compile import DeepCopyOp, get_mode
 from pytensor.compile.sharedvalue import SharedVariable
 from pytensor.graph.basic import Constant, Variable, graph_inputs
+from pytensor.printing import Print
 from pytensor.scalar import Cast
 from pytensor.tensor.elemwise import Elemwise
 from pytensor.tensor.random.op import RandomVariable
@@ -2245,3 +2246,12 @@ def normal_logp(value, mu, sigma):
     )
 
     return var
+
+
+def print_value(var, name=None):
+    """Print value of variable when it is computed during sampling.
+    This is likely to affect sampling performance.
+    """
+    if name is None:
+        name = var.name
+    return Print(name)(var)