From e772a1a9bb9626490316e6c9ae8d57cd25cff33c Mon Sep 17 00:00:00 2001
From: Eric Wieser <wieser.eric@gmail.com>
Date: Thu, 28 Dec 2017 07:40:57 +0000
Subject: ENH: Allow ptp to take an axis tuple and keepdims

---
 numpy/core/_methods.py | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'numpy/core/_methods.py')

diff --git a/numpy/core/_methods.py b/numpy/core/_methods.py
index c05316d18..0f928676b 100644
--- a/numpy/core/_methods.py
+++ b/numpy/core/_methods.py
@@ -142,3 +142,10 @@ def _std(a, axis=None, dtype=None, out=None, ddof=0, keepdims=False):
         ret = um.sqrt(ret)
 
     return ret
+
+def _ptp(a, axis=None, out=None, keepdims=False):
+    return um.subtract(
+        umr_maximum(a, axis, None, out, keepdims),
+        umr_minimum(a, axis, None, None, keepdims),
+        out
+    )
-- 
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