From 4c1fcb8472d10b52fffb50f55ba8a9b2146bf298 Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Thu, 2 Aug 2012 12:17:21 -0400
Subject: [PATCH] AFM.stepper_approach should only call figure.show if it
 exits.

For example, figures generated with the Agg backend don't have a
'show' method.
---
 pyafm/afm.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pyafm/afm.py b/pyafm/afm.py
index fc8dacb..60741c6 100644
--- a/pyafm/afm.py
+++ b/pyafm/afm.py
@@ -486,7 +486,8 @@ class AFM (object):
             axes.set_title('stepper approach {}'.format(timestamp))
             plot = axes.plot(position, deflection, 'b.-')
             figure.canvas.draw()
-            figure.show()
+            if hasattr(figure, 'show'):
+                figure.show()
             if not _matplotlib.is_interactive():
                 _matplotlib_pyplot.show()
 
-- 
2.26.2