new_contents: import numpy as np
  import os
  import json
  
  
  
  def loadMel(file="train_mel.db"):
  	mels = []
  	with open(file) as data_file:    
  		temp = json.load(data_file)
  		mels = np.array(temp)
  	print len(mels)	
  
  loadMel()
subject: load file