Compare the headers in 2 csv files with python

compare_csv_headers.py

import csv
file1 = "fromAbag.csv"
file2 = "tazData2010.csv"

def sort_lowercase_headers(csvfile):
	csvreader = csv.reader(csvfile, delimiter=',',quotechar='|')
	header=csvreader.next()
	header.sort()
	header = [x.lower() for x in header]
	return header

# coding: utf-8
import csv
with open(file1, 'rb') as csvfile:
	file1_headers = sort_lowercase_headers(csvfile)

with open(file2, 'rb') as csvfile:
	file2_headers = sort_lowercase_headers(csvfile)
       
print "headers in both files:"
print "---------------------"
print list(set(file1_headers) & set(file2_headers))
print ""

print "headers in {} but not in {}".format(file1,file2)
print "---------------------"
print '[%s]' % '\n '.join(map(str, list(set(file1_headers) - set(file2_headers))))
print ""

print "headers in {} but not in {}".format(file2,file1)
print "---------------------"
print '[%s]' % '\n '.join(map(str, list(set(file2_headers) - set(file1_headers))))