NameError: name 'clear_output' is not defined

[40U538072]

NameError Traceback (most recent call last)
in
28 #button = widgets.Button(description="Upload Voice File")
29 #button.on_click(_upload_audio)
---> 30 _upload_audio("/content/file.wav")

in _upload_audio(b)
17 _compute_embedding(audio)
18 def _upload_audio(b):
---> 19 clear_output()
20 audio = upload_audio(sample_rate=SAMPLE_RATE)
21 _compute_embedding(audio)

NameError: name 'clear_output' is not defined