#
# glyph_diff

import StringIO
import csv

file1_lines = open("file1.txt").readlines()
file2_lines = open("file2.txt").readlines()

len_diff = len(file1_lines) - len(file2_lines)
if len_diff > 0:
  print "file1 had more lines than file2"
  exit()
elif len_diff < 0:
  print "file1 had fewer lines than file2"
  exit()
else:
    for line1, line2 in zip(file1_lines, file2_lines):
        if line1 != line2:
            print "Oh no! Expected %r; got %r." % (line1, line2)

            reader1 = csv.reader(line1.split('\n'), delimiter=',')
            reader2 = csv.reader(line2.split('\n'), delimiter=',')
            row_num = 0
            col_num = 0
            for val1, val2 in zip(reader1, reader2):
                if val1 != val2:
                    print "%d,%d: %r != %r" % (row_num, col_num, val1, val2)
                    col_num += 1
                row_num += 1
            exit()

print "file1 is identical to file2"