Add note for neq

fonnesbeck · ricardoV94 · web-flow · commit ed9f5bcbd576 · 2024-06-18T09:32:27.000-04:00
Co-authored-by: Ricardo Vieira &lt;28983449+ricardoV94@users.noreply.github.com&gt;
diff --git a/pytensor/tensor/math.py b/pytensor/tensor/math.py
@@ -708,7 +708,13 @@ def eq(a, b):
 
 
 def neq(a, b):
-    """Elementwise inequality comparison, `a != b`."""
+    """Elementwise inequality comparison, `a != b`.
+    
+    Notes
+    -----
+    Due to Python rules, it is not possible to overload the non-equality symbol `!=` for hashable objects, 
+    so `neq` must always be used to compute the Elemwise non-equality of TensorVariables (which are hashable).
+    """
 
 
 def isnan(a):
