add_operators      92 python_bindings/python/Expr.cpp     add_operators(expr_class);
add_operators      46 python_bindings/python/RDom.cpp     add_operators(rvar_class);  // define operators with int, rvars, and exprs
add_operators     230 python_bindings/python/RDom.cpp     add_operators(rdom_class);  // define operators with int, rdom and exprs
add_operators     122 python_bindings/python/Var.cpp     add_operators(var_class);