python audiotools pcm.read() reading only 88200 frames instead of 13397580

I am using Python Audiotools library to access raw data of a song. When I convert the .flac to .wv and then to_pcm(), and do a pcm.read(), it shows me only the first 88200 frames of the song instead of the entire 13397580 frames. These frames that it shows are correct. I cross-checked against Audacity. Could anyone help me as to why this could be happening? I am sampling at 44.1kHz. So 88200 frames means it shows me exactly the first 2 seconds.

Here is my code

import os
from audiotools import *

files = os.listdir('./') 
stream = open(files[3])
wave = stream.convert("sample.wv",WavPackAudio)
pcm_wave = wave.to_pcm()
print len(pcm_wave.read())

for frame in frames:
  print frame,
  print "\t",