python/demos/demo_tapthebeat.py: prefix unused arguments with _

diff --git a/python/demos/demo_tapthebeat.py b/python/demos/demo_tapthebeat.py
index fb3117c..0483379 100755 (executable)
--- a/python/demos/demo_tapthebeat.py
+++ b/python/demos/demo_tapthebeat.py
@@ -44,7 +44,7 @@ a_tempo = aubio.tempo("default", win_s, hop_s, samplerate)
 click = 0.7 * np.sin(2. * np.pi * np.arange(hop_s) / hop_s * samplerate / 3000.)
 
 # pyaudio callback
-def pyaudio_callback(in_data, frame_count, time_info, status):
+def pyaudio_callback(_in_data, _frame_count, _time_info, _status):
     samples, read = a_source()
     is_beat = a_tempo(samples)
     if is_beat: