Python csv comparison using reader -

i tried script compare 2 csv files..

   import csv    file1 = open("1.csv", "r")    reader1=csv.reader(file1)    reader1.next()    file2 = open("2.csv", "r")    reader2=csv.reader(file2)    reader2.next()    file3 = open("file3.txt", "w")    file4 = open("file4.txt", "w")    file1.seek(0,0)    file2.seek(0,0)    list1 = file1.readlines()    list2 = file2.readlines()    in list1:     j in list2:         if == j:             file3.write(i)             file3.write(j)         else :             file4.write(i)             file4.write(j)     continue 

in output getting headers included , plus mismatched files repeating. eg:if 1.csv contains

name    salary      20000 b   15000 c       10000 

2.csv contains

name    salary   40000 d   10000 b   15000 c       9000 

output should be

file3: b 15000 b 15000  file4: 20000 40000        c 10000 c 9000     ------(no d in 1.csv) d 10000 

try 1 . works . showed u mechanism search . u can modify make efficient

import csv     file1 = open("book1.csv", "r")     reader1=csv.reader(file1)     print reader1     reader1.next()     file2 = open("book2.csv", "r")     reader2=csv.reader(file2)     reader2.next()     file3 = open("file3.txt", "w")     file4 = open("file4.txt", "w")     file1.seek(0,0)     file2.seek(0,0)     list1 = file1.readlines()     print list1     list2 = file2.readlines()     print list2     d={}     j in list2:         temp=j.split(',')         print temp         d[temp[0]]=temp[1]     print d     i,j in zip(list1,list2):         key = i.split(',')         try:             if d[key[0]]:                 print d[key[0]]                 if d[key[0]]==key[1]:                     file3.write(i)                     file3.write(j)                 else:                     file4.write(i)                     file4.write(j)         except:             print key[0],'not in file 2'             continue