From 1f2d7f442d649b13d44d013a37348fa194672641 Mon Sep 17 00:00:00 2001
From: Daniel Krenn <git@danielkrenn.at>
Date: Tue, 21 Feb 2017 15:07:38 +0100
Subject: [PATCH] Trac #22398: simplify id(...) = id(...) in doctest

---
 src/sage/rings/polynomial/laurent_polynomial.pyx | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/sage/rings/polynomial/laurent_polynomial.pyx b/src/sage/rings/polynomial/laurent_polynomial.pyx
index cd6507991f7..6cc680e64bd 100644
--- a/src/sage/rings/polynomial/laurent_polynomial.pyx
+++ b/src/sage/rings/polynomial/laurent_polynomial.pyx
@@ -1550,13 +1550,11 @@ cdef class LaurentPolynomial_mpair(LaurentPolynomial_generic):
             sage: v = D[k]
             sage: type(k), type(v)
             (<type 'tuple'>, <type 'sage.rings.integer.Integer'>)
-            sage: id_k = id(k)
-            sage: id_v = id(v)
             sage: LQ(D)
             x^-1*y
-            sage: id(tuple(D)[0]) == id_k
+            sage: tuple(D)[0] is k
             True
-            sage: id(D[k]) == id_v
+            sage: D[k] is v
             True
         """
         if isinstance(x, PolyDict):