Update

script/test/bs4.py

@@ -19,9 +19,24 @@ channels = [ 'Int8Waveform', 'Int16Waveform',  'Int32Waveform',  'Int64Waveform'
      'Float32Waveform', 'Float64Waveform', 'BoolWaveform']
 #for c in channels:
 #        add_device(Waveform(c, s, c, 10), True)
+#s.setIncomplete("fill_null")
 
-add_device(s, True)
 
-set_device_alias(stream, "PulseID")
 
-bscan(s , 100, save=False)
+try:  
+    add_device(s, True)
+    
+    set_device_alias(stream, "PulseID")
+    s.start()
+
+    #for i in range(10):
+    #    s.waitCacheChange(5000)
+    #    print s.take().keys(), s.take().values()  
+    
+     
+    bscan(s , 10, save=False)
+    for v in s.take().items(): print v[0], v[1]
+finally:    
+    s.close()
+
+