{"id":26848,"date":"2022-03-31T02:18:47","date_gmt":"2022-03-30T20:48:47","guid":{"rendered":"https:\/\/python-programs.com\/?p=26848"},"modified":"2022-04-01T00:16:36","modified_gmt":"2022-03-31T18:46:36","slug":"python-program-to-compare-two-text-files","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-program-to-compare-two-text-files\/","title":{"rendered":"Python Program to Compare Two Text Files"},"content":{"rendered":"<p>Let us\u00a0look at how to compare two text files in Python in this tutorial. We will use a variety of approaches to try to solve this problem.<\/p>\n<p>Let us consider the below two text files as an example:<\/p>\n<p><strong>demotextfile_1.txt:<\/strong><\/p>\n<pre>hello this is Python-programs \r\ngood morning all\r\nThen give a start to it \r\nwelcome to the greatest python coding platform<\/pre>\n<p><strong>demotextfile_2.txt:<\/strong><\/p>\n<pre>hello this is Python-programs \r\nAre you good at coding? \r\nThen give a start to it \r\ngood morning all<\/pre>\n<h2>Program to Compare Two Text Files in Python<\/h2>\n<p>Below are the ways to compare two text files in Python:<\/p>\n<ul>\n<li><a href=\"#Using_filecmp.cmp()_Method\">Using filecmp.cmp() Method<\/a><\/li>\n<li><a href=\"#Using_line_by_line_Comparision\">Using line by line Comparision<\/a><\/li>\n<\/ul>\n<h3 id=\"Using_filecmp.cmp()_Method\">Method #1: Using filecmp.cmp() Method<\/h3>\n<p>Python has a filecmp module that allows you to compare files. The filecmp.cmp() function returns a three-list of matched, errors, and mismatched files. filecmp.cmp() has two modes of operation.<\/p>\n<p><strong>shallow mode:<\/strong> In this mode, only file metadata such as size, modified date, and so on are compared.<br \/>\n<strong>deep mode:<\/strong> The content of the files is compared in this mode.<\/p>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Import filecmp module using the import keyword<\/li>\n<li>Import os module using the import keyword<\/li>\n<li>Give the first textfile as static input and store it in a variable.<\/li>\n<li>Give the second textfile as static input and store it in another variable.<\/li>\n<li>Pass the above given first and second text files as arguments to the cmp() function of the filecmp module to compare metadata in shallow mode<\/li>\n<li>Returns True if both the textfiles are the same else False<\/li>\n<li>Pass the above given first and second text files as arguments to the cmp() function of the filecmp module to comapre content in deep mode( shallow=False)<\/li>\n<li>Returns True if both the textfiles are the same else False.<\/li>\n<li>The Exit of the Program.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Import filecmp module using the import keyword \r\nimport filecmp\r\n# Import os module using the import keyword \r\nimport os\r\n# Give the first textfile as static input and store it in a variable.\r\nTextfile_1 = \"demotextfile_1.txt\"\r\n# Give the second textfile as static input and store it in another variable.\r\nTextfile_2 = \"demotextfile_2.txt\"\r\n\r\n# Pass the above given first and second text files as arguments to the cmp() function \r\n# of the filecmp module to compare metadata in shallow mode\r\n# Returns True if both the textfiles are same else False\r\nrslt = filecmp.cmp(Textfile_1, Textfile_2)\r\nprint(rslt)\r\n\r\n# Pass the above given first and second text files as arguments to the cmp() function \r\n# of the filecmp module to comapre content in deep mode( shallow=False)\r\n# Returns True if both the textfiles are same else False\r\nrslt = filecmp.cmp(Textfile_1, Textfile_2, shallow=False)\r\nprint(rslt)<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>False\r\nFalse<\/pre>\n<h3 id=\"Using_line_by_line_Comparision\">Method #2: Using line by line Comparision<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Open the first text file in read-only mode using the open() function by passing filename\/path, mode as arguments to it and store it in a variable.<\/li>\n<li>Open the second text file in read-only mode using the open() function by passing filename\/path, mode as arguments to it and store it in another variable.<\/li>\n<li>Take a variable and initialize its value with 0 <span style=\"font-size: 16px;\">which represents the line number.<\/span><\/li>\n<li>Loop in each line of the given first text file using the for loop.<\/li>\n<li>Increment the above initialized variable value by 1 which holds the line number.<\/li>\n<li>Loop in each line of the given second text file using the other nested for loop.<\/li>\n<li>Check if each line of the first text file is equal\/similar to the corresponding line of the second text file using the if conditional statement.<\/li>\n<li><span style=\"font-size: 16px;\">If it is true, then print the respective line number.<\/span><\/li>\n<li>Print Both the lines of given two text file are the same.<\/li>\n<li>Else print the respective line number and corresponding lines of both the text files.<\/li>\n<li>Close the given first text file using the close() function.<\/li>\n<li>Close the given second text file using the close() function.<\/li>\n<li>The Exit of the Program.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Open the first text file in read-only mode using the open() function\r\n# by passing filename\/path, mode as arguments to it and store it in a variable.\r\nTextfile_1 = open(\"demotextfile_1.txt\", \"r\")\r\n# Open the second text file in read-only mode using the open() function\r\n# by passing filename\/path, mode as arguments to it and store it in another variable.\r\nTextfile_2 = open(\"demotextfile_2.txt\", \"r\")\r\n# Take a variable and initialize its value with 0 which represents the line number\r\ni = 0\r\n# Loop in each line of the given first text file using the for loop\r\nfor f1_line in Textfile_1:\r\n    # Increment the above initialized\u00a0variable value by 1 which holds the line number\r\n    i += 1\r\n    # Loop in each line of the given second text file using the other nested for loop\r\n    for f2_line in Textfile_2:\r\n      # Check if each line of the first text file is equal\/similar to the corresponding line \r\n      # of the second text file using the if conditional statement\r\n      if f1_line == f2_line:\r\n          # If it is true, then print the respective line number \r\n          print(\"line_\",i,\": \")\r\n          # Print Both the lines of given two text file are the same\r\n          print(\"Both the lines of given two text file are the same\")\r\n          print()\r\n      else:\r\n          # Else print the respective line number and corresponding lines of \r\n          # both the text files\r\n          print(\"line_\",i,\": \")\r\n          print(\"Textfile_1: \", f1_line)\r\n          print(\"Textfile_2: \", f2_line)\r\n      break\r\n\r\n# Close the given first text file using the close() function\r\nTextfile_1.close()\r\n# Close the given second text file using the close() function\r\nTextfile_2.close()<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>line_ 1 : \r\nBoth the lines of given two text file are the same\r\n\r\nline_ 2 : \r\nTextfile_1: good morning all\r\n\r\nTextfile_2: Are you good at coding?\r\n\r\nline_ 3 : \r\nBoth the lines of given two text file are the same\r\n\r\nline_ 4 : \r\nTextfile_1: welcome to the greatest python coding platform\r\n\r\nTextfile_2: good morning all<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Let us\u00a0look at how to compare two text files in Python in this tutorial. We will use a variety of approaches to try to solve this problem. Let us consider the below two text files as an example: demotextfile_1.txt: hello this is Python-programs good morning all Then give a start to it welcome to the &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-program-to-compare-two-text-files\/\"> <span class=\"screen-reader-text\">Python Program to Compare Two Text Files<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python Program to Compare Two Text Files - Python Programs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/python-programs.com\/python-program-to-compare-two-text-files\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python Program to Compare Two Text Files - Python Programs\" \/>\n<meta property=\"og:description\" content=\"Let us\u00a0look at how to compare two text files in Python in this tutorial. 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