From 4a592ef10e9cad8fe469d3d5b8a29d9b0ad88a37 Mon Sep 17 00:00:00 2001
From: 2xB <31772910+2xB@users.noreply.github.com>
Date: Mon, 17 Jun 2019 19:10:32 +0200
Subject: [PATCH] Prevent element-wise string comparison

Issue #835 shows that comparing `bins`, which may be a numpy array, with a string `'auto'` leads to element-wise comparison, because the `==` operator for numpy arrays is used. With this commit, potential array and string are switched, so the `==` operator for strings is used, which does no element-wise comparison.
---
 pyqtgraph/graphicsItems/ImageItem.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyqtgraph/graphicsItems/ImageItem.py b/pyqtgraph/graphicsItems/ImageItem.py
index 65e87eec..1758bb4d 100644
--- a/pyqtgraph/graphicsItems/ImageItem.py
+++ b/pyqtgraph/graphicsItems/ImageItem.py
@@ -488,7 +488,7 @@ class ImageItem(GraphicsObject):
             step = (step, step)
         stepData = self.image[::step[0], ::step[1]]
 
-        if bins == 'auto':
+        if 'auto' == bins:
             mn = np.nanmin(stepData)
             mx = np.nanmax(stepData)
             if mx == mn: