From: Paul Brossier <piem@piem.org>
Date: Wed, 6 Mar 2013 21:56:04 +0000 (-0500)
Subject: demos/demo_beats_and_tempo.py: skip plot if not beats
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=d5e846c4a54a78204784739e155a5317f4ecfcf1;p=aubio.git

demos/demo_beats_and_tempo.py: skip plot if not beats
---

diff --git a/python/demos/demo_beats_and_tempo.py b/python/demos/demo_beats_and_tempo.py
index 2b33bb19..76094e1f 100755
--- a/python/demos/demo_beats_and_tempo.py
+++ b/python/demos/demo_beats_and_tempo.py
@@ -31,9 +31,11 @@ while True:
 periods = [60./(b - a) for a,b in zip(beats[:-1],beats[1:])]
 
 from numpy import mean, median
-print 'mean period:', mean(periods), 'bpm'
-print 'median period:', median(periods), 'bpm'
-
-from pylab import plot, show
-plot(beats[1:], periods)
-show()
+if len(periods):
+    print 'mean period:', "%.2f" % mean(periods), 'bpm', 'median', "%.2f" % median(periods), 'bpm'
+    if 0:
+        from pylab import plot, show
+        plot(beats[1:], periods)
+        show()
+else:
+    print 'mean period:', "%.2f" % 0, 'bpm', 'median', "%.2f" % 0, 'bpm'