Python code to open uncompressed wave files

wav.py

import wave
import struct
import sys

# the only non-default library
import numpy as np

input = "file_path_here.wav"

waveFile = wave.open(input, 'r')

if waveFile.getcompname() != 'not compressed':
	waveFile.close()
	print "NOT IMPLEMENTED"
	sys.exit()

length = waveFile.getnframes()
leadingZeros = 0
out = "nothing yet"
for i in range(0, length):
	waveData = waveFile.readframes(1)
	data = struct.unpack("<i", waveData)[0]
	if data != 0:
		out = np.zeros(shape=(length - leadingZeros))
		out[0] = data
		break
	else:
		leadingZeros += 1
		
if out == "nothing yet":
	out = np.zeros(shape=(length))

for i in range(1, length - leadingZeros):
    waveData = waveFile.readframes(1)
    data = struct.unpack("<i", waveData)[0]
    out[i] = data

waveFile.close()

trailingZeros = 0
for i in range(length - leadingZeros - 1, 0, -1):
	if out[i] != 0:
		break
	else:
		trailingZeros += 1

print out[0 : length - leadingZeros - trailingZeros]