The Python difflib module implements two file diff comparisons and outputs HTML format.

the Difflib module contains tools for calculating and processing differences between sequences. It is especially useful for comparing text, which contains functions that can generate reports using a variety of common difference formats.  

Three classes are implemented:

• sequencematcher comparison of any type sequence (can compare strings)

• differ Comparison of strings

• Htmldiff output of comparison results to HTML format

#!/usr/bin/env python##-*- coding: utf-8 -*-import difflibimport systry:     textfile1=sys.argv[1]    textfile2=sys.argv[2]except exception  as e:    print ("Error:" +str (e))     print ("Usage:diff_ Simple3.py filename1 filename2 ")     sys.exit () def readfile (filename):     try:        filehandle=open (filename, ' RB ')          text=filehandle.read (). Splitlines ()          filehandle.close ()         return text     except ioerror as error:        print ("Read file error:" +str (Error))         sys.exit () if  textfile1== ""  or textfile2== "":     print ("Usage:diff_simple3")     sys.exit () Text1_lines=readfile ( Textfile1) Text2_lines=readfile (textfile2) d = difflib. Htmldiff () print (D.make_file (text1_lines,text2_lines))

The Python difflib module implements two file diff comparisons and outputs HTML format.