From 691da09eb0897ddc1361b72a122f20e4c94b5851 Mon Sep 17 00:00:00 2001
From: Thomas A Caswell <tcaswell@bnl.gov>
Date: Thu, 14 Feb 2019 16:36:02 -0500
Subject: [PATCH] MNT: do not use 'is' with literals, use ==

py3.8 gives a syntax warning on this
---
 pyqtgraph/graphicsItems/PlotItem/PlotItem.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pyqtgraph/graphicsItems/PlotItem/PlotItem.py b/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
index b8face5e..ae74c5b6 100644
--- a/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
+++ b/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
@@ -986,8 +986,8 @@ class PlotItem(GraphicsWidget):
         self._menuEnabled = enableMenu
         if enableViewBoxMenu is None:
             return
-        if enableViewBoxMenu is 'same':
-            enableViewBoxMenu = enableMenu 
+        if enableViewBoxMenu == 'same':
+            enableViewBoxMenu = enableMenu
         self.vb.setMenuEnabled(enableViewBoxMenu)
     
     def menuEnabled(self):