handling any Expr not just Sym

symbolic_tuples.rst

@@ -93,3 +93,14 @@ up(2, 4)
 
 >>> r(s=up(1, 2), t=up(3, 4))
 up(up(3, 6), up(4, 8))
+
+>>> u = Sym("v") * (Sym("w") + Sym("x"))
+
+>>> u(w=up(1, 2))
+(v * (up(1, 2) + x))
+
+>>> u(w=up(1, 2), x=up(3, 4))
+(v * up(4, 6))
+
+>>> u(v=down(2, 3))(w=up(1, 2), x=up(3, 4))
+26

tuples.py

@@ -2,7 +2,7 @@
 see ``tuples.rst`` for an explanation.
 """
 
-from symbolic import Sym, Expr, Add, Sub, Mul
+from symbolic import Expr, Add, Sub, Mul
 
 
 class Tuple(Expr):
@@ -33,7 +33,7 @@ def __add__(self, other):
                     *(s + o for (s, o) in zip(
                         self._components, other._components))
                 )
-        elif isinstance(other, Sym):
+        elif isinstance(other, Expr):
             return Add(self, other)
         else:
             raise TypeError("addend must be tuple or symbol")
@@ -47,7 +47,7 @@ def __sub__(self, other):
                     *(s - o for (s, o) in zip(
                         self._components, other._components))
                 )
-        elif isinstance(other, Sym):
+        elif isinstance(other, Expr):
             return Sub(self, other)
         else:
             raise TypeError("subtrahend must be tuple or symbol")
@@ -61,7 +61,7 @@ def __mul__(self, other):
                     s * o for (s, o) in zip(
                         self._components, other._components)
                 )
-        elif isinstance(other, Sym):
+        elif isinstance(other, Expr):
             return Mul(self, other)
         else:
             return other * self  # defer to __rmul__