From 3856a73ec59d9dcf8252a2d38b43191eacacbd2e Mon Sep 17 00:00:00 2001
From: Eric Wieser <wieser.eric@gmail.com>
Date: Tue, 17 Oct 2017 20:41:39 -0700
Subject: BUG: count_nonzero treats empty axis tuples strangely

Fixes #9728

This bug was introduced with the `axis` keyword in #7177, as a misguided optimization.
---
 numpy/core/numeric.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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

diff --git a/numpy/core/numeric.py b/numpy/core/numeric.py
index 6d29785da..1f8f5d43e 100644
--- a/numpy/core/numeric.py
+++ b/numpy/core/numeric.py
@@ -406,7 +406,7 @@ def count_nonzero(a, axis=None):
     array([2, 3])
 
     """
-    if axis is None or (isinstance(axis, tuple) and axis == ()):
+    if axis is None:
         return multiarray.count_nonzero(a)
 
     a = asanyarray(a)
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