Update Readme Typo

diff --git a/python/README b/python/README
index ffc730e..d28b7ea 100644 (file)
--- a/python/README
+++ b/python/README
@@ -56,7 +56,7 @@ you should be able to run the tests:
 
 And to try out the demos:
 
-    $ ./demos/demo_source.wav /path/to/sound/sample.wav
+    $ ./demos/demo_source.py /path/to/sound/sample.wav
 
 You need to install additional modules to run some of the demos. For
 instance, several demos use [matplotlib](http://matplotlib.org/) to draw plots.