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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def write_wave(path, audio, sample_rate):
 """Writes a .wav file. Takes path, PCM audio data, and sample rate. """

    with contextlib.closing(wave.open(path, 'wb')) as wf:
        wf.setnchannels(1)
        wf.setsampwidth(2)
        wf.setframerate(sample_rate)
        wf.writeframes(audio)