Aubio with audio file in realtime from python?

[minwook96]

I want to know the pitch by frame by running the mp3 or wav file
When the pitch value is output, 0 is continuously displayed.
where is the problem?
I want to (Ex, C1, F2)

import aubio
import numpy as np
import pyaudio
import time
import argparse
import queue
import wave
import music21  # yes! new favorite library

# parser = argparse.ArgumentParser()
# parser.add_argument("-input", required=False, type=int, help="Audio Input Device")
# args = parser.parse_args()
#
# if not args.input:
#     print("No input device specified. Printing list of input devices now: ")
#     p = pyaudio.PyAudio()
#     for i in range(p.get_device_count()):
#         print("Device number (%i): %s" % (i, p.get_device_info_by_index(i).get('name')))
#     print("Run this program with -input 1, or the number of the input you'd like to use.")
#     exit()
CHUNK = 1024
wf = wave.open("temp.wav", 'rb')

# PyAudio object.
p = pyaudio.PyAudio()

# Open stream.
stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
                channels=wf.getnchannels(),
                rate=wf.getframerate(),
                output=True)
# stream = p.open(format=pyaudio.paFloat32,
#                 channels=1, rate=44100, input=True,
#                 input_device_index=args.input, frames_per_buffer=4096)
time.sleep(1)
data = wf.readframes(CHUNK)
# Aubio's pitch detection.
pDetection = aubio.pitch("default", 2048, 2048 // 2, 44100)
# Set unit.
pDetection.set_unit("Hz")
pDetection.set_silence(-40)

q = queue.Queue()


def get_current_note(volume_thresh=0.01, printOut=False):
    global data
    """Returns the Note Currently Played on the q object when audio is present

    Keyword arguments:

    volume_thresh -- the volume threshold for input. defaults to 0.01
    printOut -- whether or not to print to the terminal. defaults to False
    """
    current_pitch = music21.pitch.Pitch()

    while True:
        stream.write(data)
        data = wf.readframes(CHUNK)
        samples = np.fromstring(data, dtype=aubio.float_type)
        pitch = pDetection(samples)[0]
        print(pitch)
        # Compute the energy (volume) of the
        # current frame.
        volume = np.sum(samples ** 2) / len(samples) * 100
        # print(volume)
        if pitch > volume_thresh:  # adjust with your mic!
            current_pitch.frequency = pitch
        else:
            continue

        if printOut:
            print(current_pitch)

        else:
            current = current_pitch.nameWithOctave
            q.put({'Note': current, 'Cents': current_pitch.microtone.cents})


if __name__ == '__main__':
    get_current_note(volume_thresh=0.001, printOut=True)