import difflib
import sys
import os

input_file1 = '\\dir\\subdir\\application.properties'
input_file2 = '\\dir\\application.properties'

output_file = str(input_file2[6:])

def get_difference(output, input_1, input_2):
    with open(os.getcwd() + input_1, 'r') as hosts0:
        with open(os.getcwd() + input_2, 'r') as hosts1:
            diff = difflib.unified_diff(
                hosts0.readlines(),
                hosts1.readlines(),
                fromfile='hosts0',
                tofile='hosts1',
            )

            orig_stdout = sys.stdout
            f = file(output, 'w')
            sys.stdout = f

            for line in diff:
                print line[1:].rstrip("\n")

            sys.stdout = orig_stdout
            f.close()


def delete_lines(filename):
    with open(str(filename), 'r') as fin:
        data = fin.read().splitlines(True)
    with open(str(filename), 'w') as fout:
        fout.writelines(data[3:])


if __name__ == '__main__':
    get_difference(output_file, input_file1, input_file2)
    delete_lines(output_file)