From 2ee2abf22f8bf06995c2ce0fb70f365cba8055d8 Mon Sep 17 00:00:00 2001
From: Julian Rueth <julian.rueth@fsfe.org>
Date: Wed, 19 Jul 2017 23:36:33 +0000
Subject: [PATCH] Do not override __richcmp__ in Ring morphisms

---
 src/sage/rings/morphism.pyx | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/sage/rings/morphism.pyx b/src/sage/rings/morphism.pyx
index 978fe442e81..c5e8be448f5 100644
--- a/src/sage/rings/morphism.pyx
+++ b/src/sage/rings/morphism.pyx
@@ -499,7 +499,7 @@ cdef class RingMap_lift(RingMap):
         _slots['S'] = self.S
         return Morphism._extra_slots(self, _slots)
 
-    def __richcmp__(self, other, int op):
+    def _richcmp_(self, other, int op):
         """
         Compare a ring lifting maps ``self`` to ``other``.
 
@@ -940,7 +940,7 @@ cdef class RingHomomorphism_coercion(RingHomomorphism):
         """
         return "Ring Coercion"
 
-    def __richcmp__(self, other, int op):
+    def _richcmp_(self, other, int op):
         """
         Compare a ring coercion morphism ``self`` to ``other``.
 
@@ -1633,7 +1633,7 @@ cdef class RingHomomorphism_cover(RingHomomorphism):
         """
         return self.codomain().defining_ideal()
 
-    def __richcmp__(self, other, int op):
+    def _richcmp_(self, other, int op):
         """
         Compare ``self`` to ``other``.
 
@@ -1830,7 +1830,7 @@ cdef class RingHomomorphism_from_quotient(RingHomomorphism):
         """
         return self.phi
 
-    def __richcmp__(self, other, op):
+    def _richcmp_(self, other, op):
         """
         Compare ``self`` to ``other``.