python - Error generated in pyaudio stream assignment -


good day. new pyaudio. trying run following code, after cleaning errors , , launching jackd. 

def generate_sample(self, ob, preview): print("* generating sample...") tone_out = array(ob, dtype=int16)  if preview:     print("* previewing audio file...")      bytestream = tone_out.tobytes()     pya = pyaudio.pyaudio()     stream = pya.open(format=pya.get_format_from_width(width=2), channels=1, rate=output_sample_rate, output=true)     stream.write(bytestream)     stream.stop_stream()     stream.close()      pya.terminate()     print("* preview completed!") else:     write('sound.wav', sample_rate, tone_out)     print("* wrote audio file!")

the line sets stream generates following error:

type error: unbound method get_format_from_width() must called pyaudio instance first argument ( got int instance...

all of coding sources have found use exact same function call , fail. not understand ( , others ) have done wrong. thank you. if matters, running python 2.7.9 on raspberry pi / raspbian.


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