new_contents: import csv
  import math
  import collections
  from collections import Counter
  
  ReadFile = 'SIC581208.csv'
  inf = csv.reader(open(ReadFile,"rU"))
  i = 0
  j = 0
  BusinessName = []
  for row in inf:
      i = 1+1
      if i > 1:
          zip = row[6]
          if zip == '90002':
              name = row[1]
              BusinessName.append(name)
              j=j+1
  print Counter(BusinessName)
  print set(BusinessName)
  j=0
  Entropy = 0
  for j in range(0,len(BusinessName)):
      if BusinessName[j] != BusinessName[j-1]:
              p = float(BusinessName.count(BusinessName[j]))/float(len(BusinessName))
              Entropy = -1.0*math.log(p)*p + Entropy
              print j,BusinessName[j],BusinessName.count(BusinessName[j]),p
      j=j+1
  print Entropy
  
subject: Create FoodDiversity1.py