Python using difflib Comparison file example

Source: Internet
Author: User
Tags diff file diff readfile

Compare file contents using the Difflib module

1 Example: string difference comparison

Vim duibi.py

#!/usr/bin/env python# -*- coding: utf-8 -*-import reimport osimport  Difflibtex1= "" "Tex1:this is a test for difflib ,just try to get  difference of the log now try to determine whether the function is feasible   good goodtest so try it. Good "" "Tex1_lines=tex1.splitlines () tex2 = "" "tex2:this is a test for difflib ,just try to get  Difference of the log now try the function is feasible goodtast so try it "" "Tex2_lines=tex2.splitlines () #--------- The original contrast method----------#d =difflib. Differ () #diff =d.compare (tex1_lines,tex2_lines) #print   ' \ n '. Join (List diff) #--------HTML comparison Method----------# and modify the diff.html encoding, change iso-8859-1 to UTF-8 format parsing file, used to compare Chinese d=difflib. Htmldiff () q=d.make_file (tex1_lines,tex2_lines) old_str= ' charset=iso-8859-1 ' new_str= ' charset=UTF-8 ' with  Open (' diff.html ', ' W ')  as f_new:f_new.write (Q.replace (OLD_STR,NEW_STR)) ############################## D=difflib. Htmldiff () #q =d.make_file (tex1_lines,tex2_lines) #old_Str= ' charset=iso-8859-1 ' #new_str = ' charset=utf-8 ' #data =q.replace (old_str,new_str) #fo =open (' diff.html ', ' W ') # Fo.write (data) #fo. Close () ############################

Run Python duibi.py production diff.html

The browser opens diff.html to view the comparison results.

2 sample file Comparison file diff code can be used directly without modification (including Chinese)

Compare the differences of Testfile1 Testfile2 with the following script

Vim diff.py

#!/usr/bin/env python# -*- coding: utf-8 -*-import osimport sysimport  difflibtry:tfile1=sys.argv[1]tfile2=sys.argv[2]except exception,e:print  "Error:" +str (e) print  " Please enter the exact parameters, for example: Python diff.py file1 file2 "Sys.exit () def readfile (filename): Try:filehandle=open (filename, ' RB ') Lines=filehandle.read (). Splitlines () filehandle.close () Return linesexcept ioerror  as error:print (' Read file error: ' +str (Error) ') Sys.exit () if tfile1== ""  or tfile2== "":p rint   "Please input parameters accurately, e.g. python diff.py file1 file2" Sys.exit () tfile1_lines=readfile (tfile1) tfile2_ Lines=readfile (tfile2) #d =difflib. Htmldiff () #print  s.make_file (tfile1_lines,tfile2_lines) #为了生成html能识别中文, use the following code  # Modify the diff.html encoding to change the iso-8859-1 to utf-8#==================================== #方法1: #d =difflib. Htmldiff () #q =d.make_file (tfile1_lines,tfile2_lines) #old_str = ' charset=iso-8859-1 ' #new_str = ' charset=utf-8 ' #data = Q.replace (OLD_STR,NEW_STR) #fo =open (' diff.HTML ', ' W ') #fo. Write (data) #fo. Close () #==================================== #方法2: #d =difflib. Htmldiff () #q =d.make_file (tfile1_lines,tfile2_lines) #old_str = ' charset=iso-8859-1 ' #new_str = ' charset=utf-8 ' #fo = Open (' diff.html ', ' W ') #fo. Write (q) #fo. Close () #with  open (' diff.html ', ' R ')  as f:#         lines=f.readlines () #with  open (' diff.html ', ' W ')  as f_new:#         for line in lines:#                 f_new.write (Line.replace (old_str,new_ STR)) #===================================== #方法3: old_str= ' charset=iso-8859-1 ' new_str= ' charset=utf-8 ' d=difflib. Htmldiff () q=d.make_file (tfile1_lines,tfile2_lines) with open (' diff.html ', ' W ')  as f_new:f_ New.write (Q.replace (OLD_STR,NEW_STR))


Execute python diff.py testfile1 testfile2

Generate diff.html

Browser View File comparison results





Python using difflib Comparison file example

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.