From 983a3769e7287565f8b9c502905a4dbc6d04b5b0 Mon Sep 17 00:00:00 2001
From: Ogi Moore <ognyan.moore@gmail.com>
Date: Sun, 31 Jan 2021 22:32:56 -0800
Subject: [PATCH] Check for None first

---
 pyqtgraph/graphicsItems/GraphItem.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyqtgraph/graphicsItems/GraphItem.py b/pyqtgraph/graphicsItems/GraphItem.py
index ee5207e9..c2cb1254 100644
--- a/pyqtgraph/graphicsItems/GraphItem.py
+++ b/pyqtgraph/graphicsItems/GraphItem.py
@@ -55,7 +55,7 @@ class GraphItem(GraphicsObject):
         """
         if 'adj' in kwds:
             self.adjacency = kwds.pop('adj')
-            if self.adjacency.dtype.kind not in 'iu' and self.adjacency is not None:
+            if self.adjacency is not None and self.adjacency.dtype.kind not in 'iu':
                 raise Exception("adjacency array must have int or unsigned type.")
             self._update()
         if 'pos' in kwds: