import pyaudio
import wave
import struct
import numpy as np
import time
import itertools

CHUNK = 512
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
num_chunks=1
freqs=np.fft.fftfreq(CHUNK*num_chunks)
print(len(freqs))
p = pyaudio.PyAudio()

stream = p.open(format=FORMAT,
                channels=CHANNELS,
                rate=RATE,
                input=True,
                frames_per_buffer=CHUNK)


while True:
    data = stream.read(CHUNK)
    data=struct.unpack('%dh'%CHUNK, data)
    w = np.fft.fft(data)
    amp=np.array([np.absolute(x) for x in w])
    idx=np.argmax(amp)
    max_freq=freqs[idx]
    freq_in_hertz=abs(max_freq*RATE)
    print(freq_in_hertz)