From 4c8f65a655853d5ceb663394b363856064de28f3 Mon Sep 17 00:00:00 2001
From: Joris Van den Bossche <jorisvandenbossche@gmail.com>
Date: Thu, 1 Apr 2021 14:09:40 +0200
Subject: [PATCH] PERF: numexpr doesn't support floordiv, so don't try

---
 pandas/core/computation/expressions.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pandas/core/computation/expressions.py b/pandas/core/computation/expressions.py
index 8205534c9d48b..43b6a6fb64314 100644
--- a/pandas/core/computation/expressions.py
+++ b/pandas/core/computation/expressions.py
@@ -128,8 +128,9 @@ def _evaluate_numexpr(op, op_str, a, b):
     roperator.rsub: "-",
     operator.truediv: "/",
     roperator.rtruediv: "/",
-    operator.floordiv: "//",
-    roperator.rfloordiv: "//",
+    # floordiv not supported by numexpr 2.x
+    operator.floordiv: None,
+    roperator.rfloordiv: None,
     # we require Python semantics for mod of negative for backwards compatibility
     # see https://github.com/pydata/numexpr/issues/365
     # so sticking with unaccelerated for now