Move same magic methods from Expr and GenExpr to ExprLike

CHANGELOG.md

@@ -4,7 +4,11 @@
 ### Added
 ### Fixed
 ### Changed
+<<<<<<< ExprLike
+- Move magic methods (`__radd__`, `__sub__`, `__rsub__`, `__rmul__`, `__richcmp__`, `__neg__`, and `__rtruediv__`) to `ExprLike` base class
+=======
 - Speed up `Expr.__add__` and `Expr.__iadd__` via the C-level API
+>>>>>>> master
 ### Removed
 
 ## 6.2.1 - 2026.05.16

src/pyscipopt/expr.pxi

@@ -257,6 +257,27 @@ cdef class ExprLike:
 
         return NotImplemented
 
+    def __radd__(self, other, /):
+        return self + other
+
+    def __sub__(self, other, /):
+        return self + (-other)
+
+    def __rsub__(self, other, /):
+        return (-self) + other
+
+    def __rmul__(self, other, /):
+        return self * other
+
+    def __rtruediv__(self, other, /) -> GenExpr:
+        return buildGenExprObj(other) / self
+
+    def __richcmp__(self, other, int op):
+        return _expr_richcmp(self, other, op)
+
+    def __neg__(self, /) -> Union[Expr, GenExpr]:
+        return self * -1.0
+
     def __abs__(self) -> GenExpr:
         return UnaryExpr(Operator.fabs, buildGenExprObj(self))
 
@@ -358,11 +379,10 @@ cdef class Expr(ExprLike):
             return 1.0 / other * self
         return buildGenExprObj(self) / other
 
-    def __rtruediv__(self, other):
-        ''' other / self '''
+    def __rtruediv__(self, other, /) -> GenExpr:
         if not _is_expr_compatible(other):
             return NotImplemented
-        return buildGenExprObj(other) / self
+        return super().__rtruediv__(other)
 
     def __pow__(self, other, modulo):
         if float(other).is_integer() and other >= 0:
@@ -387,25 +407,6 @@ cdef class Expr(ExprLike):
             raise ValueError("Base of a**x must be positive, as expression is reformulated to scip.exp(x * scip.log(a)); got %g" % base)
         return (self * Constant(base).log()).exp()
 
-    def __neg__(self):
-        return Expr({v:-c for v,c in self.terms.items()})
-
-    def __sub__(self, other):
-        return self + (-other)
-
-    def __radd__(self, other):
-        return self.__add__(other)
-
-    def __rmul__(self, other):
-        return self.__mul__(other)
-
-    def __rsub__(self, other):
-        return -1.0 * self + other
-
-    def __richcmp__(self, other, int op):
-        '''turn it into a constraint'''
-        return _expr_richcmp(self, other, op)
-
     def normalize(self):
         '''remove terms with coefficient of 0'''
         self.terms =  {t:c for (t,c) in self.terms.items() if c != 0.0}
@@ -464,7 +465,6 @@ cdef class ExprCons:
         if not self._rhs is None:
             self._rhs -= c
 
-
     def __richcmp__(self, other, op):
         '''turn it into a constraint'''
         if not _is_number(other):
@@ -690,30 +690,10 @@ cdef class GenExpr(ExprLike):
             raise ZeroDivisionError("cannot divide by 0")
         return self * divisor**(-1)
 
-    def __rtruediv__(self, other):
-        ''' other / self '''
+    def __rtruediv__(self, other, /) -> GenExpr:
         if not _is_genexpr_compatible(other):
             return NotImplemented
-        return buildGenExprObj(other) / self
-
-    def __neg__(self):
-        return -1.0 * self
-
-    def __sub__(self, other):
-        return self + (-other)
-
-    def __radd__(self, other):
-        return self.__add__(other)
-
-    def __rmul__(self, other):
-        return self.__mul__(other)
-
-    def __rsub__(self, other):
-        return -1.0 * self + other
-
-    def __richcmp__(self, other, int op):
-        '''turn it into a constraint'''
-        return _expr_richcmp(self, other, op)
+        return super().__rtruediv__(other)
 
     def degree(self):
         '''Note: none of these expressions should be polynomial'''

src/pyscipopt/scip.pyi

@@ -331,6 +331,12 @@ class ExprLike:
         *args: Incomplete,
         **kwargs: Incomplete,
     ) -> Incomplete: ...
+    def __radd__(self, other: object, /) -> Incomplete: ...
+    def __sub__(self, other: object, /) -> Incomplete: ...
+    def __rsub__(self, other: object, /) -> Incomplete: ...
+    def __rmul__(self, other: object, /) -> Incomplete: ...
+    def __rtruediv__(self, other: object, /) -> GenExpr: ...
+    def __neg__(self, /) -> Union[Expr, GenExpr]: ...
     def __abs__(self) -> GenExpr: ...
     def exp(self) -> GenExpr: ...
     def log(self) -> GenExpr: ...
@@ -344,7 +350,6 @@ class Expr(ExprLike):
     def __init__(self, terms: Incomplete = ...) -> None: ...
     def degree(self) -> Incomplete: ...
     def normalize(self) -> Incomplete: ...
-    def __abs__(self) -> GenExpr: ...
     def __add__(self, other: Incomplete, /) -> Incomplete: ...
     def __eq__(self, other: object, /) -> bool: ...
     def __ge__(self, other: object, /) -> bool: ...
@@ -356,14 +361,8 @@ class Expr(ExprLike):
     def __lt__(self, other: object, /) -> bool: ...
     def __mul__(self, other: Incomplete, /) -> Incomplete: ...
     def __ne__(self, other: object, /) -> bool: ...
-    def __neg__(self) -> Incomplete: ...
     def __pow__(self, other: Incomplete, modulo: Incomplete = ..., /) -> Incomplete: ...
-    def __radd__(self, other: Incomplete, /) -> Incomplete: ...
-    def __rmul__(self, other: Incomplete, /) -> Incomplete: ...
     def __rpow__(self, other: Incomplete, /) -> Incomplete: ...
-    def __rsub__(self, other: Incomplete, /) -> Incomplete: ...
-    def __rtruediv__(self, other: Incomplete, /) -> Incomplete: ...
-    def __sub__(self, other: Incomplete, /) -> Incomplete: ...
     def __truediv__(self, other: Incomplete, /) -> Incomplete: ...
 
 @disjoint_base
@@ -390,7 +389,6 @@ class GenExpr(ExprLike):
     def __init__(self) -> None: ...
     def degree(self) -> Incomplete: ...
     def getOp(self) -> Incomplete: ...
-    def __abs__(self) -> GenExpr: ...
     def __add__(self, other: Incomplete, /) -> Incomplete: ...
     def __eq__(self, other: object, /) -> bool: ...
     def __ge__(self, other: object, /) -> bool: ...
@@ -399,14 +397,8 @@ class GenExpr(ExprLike):
     def __lt__(self, other: object, /) -> bool: ...
     def __mul__(self, other: Incomplete, /) -> Incomplete: ...
     def __ne__(self, other: object, /) -> bool: ...
-    def __neg__(self) -> Incomplete: ...
     def __pow__(self, other: Incomplete, modulo: Incomplete = ..., /) -> Incomplete: ...
-    def __radd__(self, other: Incomplete, /) -> Incomplete: ...
-    def __rmul__(self, other: Incomplete, /) -> Incomplete: ...
     def __rpow__(self, other: Incomplete, /) -> Incomplete: ...
-    def __rsub__(self, other: Incomplete, /) -> Incomplete: ...
-    def __rtruediv__(self, other: Incomplete, /) -> Incomplete: ...
-    def __sub__(self, other: Incomplete, /) -> Incomplete: ...
     def __truediv__(self, other: Incomplete, /) -> Incomplete: ...
 
 @disjoint_base