Move same magic methods from Expr and GenExpr to ExprLike

CHANGELOG.md

@@ -13,6 +13,7 @@
 ### Changed
 - Speed up `constant * Expr` via C-level API
 - Speed up `Term.__eq__` via the C-level API
+- Move magic methods (`__radd__`, `__sub__`, `__rsub__`,  `__rmul__`, `__richcmp__`, `__neg__`, and `__rtruediv__`) to `ExprLike` base class
 ### Removed
 - Removed outdated warning about Make build system incompatibility
 - Removed `Term.ptrtuple` to optimize `Term` memory usage

src/pyscipopt/expr.pxi

@@ -261,6 +261,27 @@ 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):
+        return buildGenExprObj(other) / self
+
+    def __richcmp__(self, other, int op):
+        return _expr_richcmp(self, other, op)
+
+    def __neg__(self):
+        return self * -1.0
+
     def __abs__(self) -> GenExpr:
         return UnaryExpr(Operator.fabs, buildGenExprObj(self))
 
@@ -383,10 +404,6 @@ cdef class Expr(ExprLike):
         selfexpr = buildGenExprObj(self)
         return selfexpr.__truediv__(other)
 
-    def __rtruediv__(self, other):
-        ''' other / self '''
-        return buildGenExprObj(other) / self
-
     def __pow__(self, other, modulo):
         if float(other).is_integer() and other >= 0:
             exp = int(other)
@@ -411,25 +428,6 @@ cdef class Expr(ExprLike):
         else:
             raise TypeError(f"Unsupported base type {type(other)} for exponentiation.")
 
-    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, 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}
@@ -488,7 +486,6 @@ cdef class ExprCons:
         if not self._rhs is None:
             self._rhs -= c
 
-
     def __richcmp__(self, other, op):
         '''turn it into a constraint'''
         if op == 1: # <=
@@ -715,30 +712,6 @@ cdef class GenExpr(ExprLike):
             raise ZeroDivisionError("cannot divide by 0")
         return self * divisor**(-1)
 
-    def __rtruediv__(self, other):
-        ''' other / self '''
-        otherexpr = buildGenExprObj(other)
-        return otherexpr.__truediv__(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, op):
-        '''turn it into a constraint'''
-        return _expr_richcmp(self, other, op)
-
     def degree(self):
         '''Note: none of these expressions should be polynomial'''
         return float('inf')