python 2.7 - How to separate frequency of audiofile -

i want determine frequencies of .mp3 or .wav file , print it

import pyaudio import wave import numpy np  chunk = 2048 wf = wave.open('/home/pi/adhuri.wav', 'rb') swidth = wf.getsampwidth() rate = wf.getframerate() window = np.blackman(chunk) p = pyaudio.pyaudio() stream = p.open(format =             p.get_format_from_width(wf.getsampwidth()),             channels = wf.getnchannels(),             rate = rate,             output = true)  # read data data = wf.readframes(chunk) # play stream , find frequency of each chunk while len(data) == chunk*swidth:     print "ok"     stream.write(data)     indata = np.array(wave.struct.unpack("%dh"%(len(data)/swidth),\                                      data))*window     fftdata=abs(np.fft.rfft(indata))**2     = fftdata[1:].argmax() + 1     if != len(fftdata)-1:         y0,y1,y2 = np.log(fftdata[which-1:which+2:])         x1 = (y2 - y0) * .5 / (2 * y1 - y2 - y0)         thefreq = (which+x1)*rate/chunk         print "the freq %f hz." % (thefreq)     else:         thefreq = which*rate/chunk         print "the freq %f hz." % (thefreq)     # read more data     data = wf.readframes(chunk) if data:     stream.write(data) stream.close() p.terminate() 

it not satisfy while len(data) == chunkswidth: , when writing while len(data) != chunkswidth: enters loop , shows error message valueerror: operands not broadcast shapes (4096)(2048) . how solve problem?