new_contents: # merge seperate files
  import glob
  import csv
  import scipy
  
  dir = "/Users/lily/workspace/find_best_mall/yelp_crawler/yelp_crawler/result"
  
  file_count = len(glob.glob(dir + "/*.csv"))
  # i=0;
  # for file in glob.glob(dir + "/*.csv"):
  #     # i=i+1;
  #     with open(file, "rU") as f:
  
subject: add mergefile