def readFile(filename,columns):
mylist=[]
    with open(filename,'rb') as f:
                reader = csv.reader(f)
                for line in reader:
                    mylist.append(tuple(line[i] for i in columns))
    return mylist

mylist1=readFile(filename1,columns)
mylist2=readFile(filename2,columns)
diff1=diff(mylist1,mylist2)
diff2=diff(mylist2,mylist2)

with open(filename1, 'rb') as f1, open(filename2, 'rb') as f2

  rdr1 = CsvReader(f1)
  rdr2 = CsvReader(f2)

  for file1_line in rdr1:

     file2_line = rdr2.next()

     # Perform your comparison between file1_line and file2_line here
     # and print differences, or accumulate only the differences in a
     # results list.

import csv

result_path   = 'result_check.csv'
result_file = open(result_path,'r')
result_reader = csv.reader(result_file)

f1 = {}
for rows in result_reader:
    f1[rows[0]] = rows[1]


forest_path = 'pandababy3.csv'
forest_file = open(forest_path, 'r')
forest_reader = csv.reader(forest_file)

f2 = {}
for rows in forest_reader:
    f2[rows[0]] = rows[1]

x = len(set(f1.items()).intersection(set(f2.items())))

print(x)

import csv
import itertools

reader1 = csv.reader(filename1)
reader2 = csv.reader(filename2)

for lhs, rhs in itertools.izip(reader1, reader2):
    if lhs != rhs:
        print "difference:", lhs, rhs

paste <(awk -F, '{ print $1;next } file1.csv ) <(awk -F, '{print $1;next } file2.csv) | awk '{ if ($1==$2) print "match" ; else print "mismatch" }'

awk -F, 'NR<=10{print $1}' file1.csv