python script to get the unique value by comparing the first column from a list of three csv files : There are three files file1.csv,file2.csv.file3.csv with 6 columns in each file. 

i want to find the unique value in first column by comparing among all the three files at a time  and print the output from python

file1.csv

11 12 13 14 15 16

22 23 24 25 26 27

11 32 33 34 35 36

file2.csv

44 45 46 47 48 49

55 56 57 58 59 60

44 66 67 68 69 70

file3.csv

71 72 73 74 75 76

11 82 83 84 85 86

71 92 93 94 95 96




script output should look like:

22

55 

explanation  for the output:

output is 22 and 55 why because file1 first column unique is only 22 and file 2  first column unique is  55 and in file3 their is no unique because 11 and 77 are repeated.


