#! /usr/bin/env python
# coding: utf-8

def func(local_seq):
 local_seq[3] = 11
 return local_seq

pitchData = []
seq = [0, 10, 20, 30]

pitchData.append(seq)
lastSeq = pitchData[ len(pitchData)-1 ]
print pitchData

seq = func(lastSeq)
pitchData.append(seq)
print pitchData