{"id":179,"date":"2023-01-07T18:36:38","date_gmt":"2023-01-07T18:36:38","guid":{"rendered":"https:\/\/jassweb.com\/new22\/solved-how-to-print-selected-elements-from-file\/"},"modified":"2023-01-07T18:36:38","modified_gmt":"2023-01-07T18:36:38","slug":"solved-how-to-print-selected-elements-from-file-2","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-print-selected-elements-from-file-2\/","title":{"rendered":"[Solved] How to print selected elements from file?"},"content":{"rendered":"<h2> Introduction <\/h2>\n<p>[ad_1]<\/p>\n<p>Printing selected elements from a file can be a useful way to quickly access the information you need. Whether you are looking to print out a specific line from a text file or a specific column from a CSV file, there are a few different methods you can use to achieve this. In this article, we will discuss how to print selected elements from a file using various methods in Python. We will also discuss the advantages and disadvantages of each method. By the end of this article, you should have a better understanding of how to print selected elements from a file.<\/p>\n<h2> Solution<\/h2>\n<p><\/p>\n<p>Using Python, you can print selected elements from a file by using the following code:<\/p>\n<p>with open(&#8216;filename.txt&#8217;, &#8216;r&#8217;) as f:<br \/>\n    for line in f:<br \/>\n        elements = line.split()<br \/>\n        if elements[0] == &#8216;element_to_print&#8217;:<br \/>\n            print(elements[1]) <\/p>\n<p><\/p>\n<div class=\"entry-content\" itemprop=\"text\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><br \/>\n<script><\/p>\n<p><\/script><\/p>\n<p><\/p>\n<div id=\"answer-30289009\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"30289009\" data-parentid=\"30288875\" data-score=\"-1\" data-position-on-page=\"2\" data-highest-scored=\"0\" data-question-has-accepted-highest-score=\"0\" itemprop=\"suggestedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Here is one way:<\/p>\n<pre><code>with open(\"fk.txt\") as file:   # Use file to refer to the file object\n    data = file.readlines()\ncolumn1, column2 = [], []\nfor line in data:\n    try:\n        entry1, entry2 = line.split(' ')\n        column1.append(int(entry1))\n        column2.append(int(entry2))\n    except ValueError:\n        pass\nprint column1, column2\n<\/code><\/pre>\n<\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p> <span class=\"d-none\" itemprop=\"commentCount\">2<\/span> <\/p>\n<\/div>\n<\/div>\n<p>solved How to print selected elements from file? <\/p>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><br \/>\n<script><\/p>\n<p><\/script><\/div>\n<p>[ad_2]<\/p>\n<pre>\n#include &lt;stdio.h&gt;\n\nint main()\n{\n    FILE *fp;\n    char ch;\n    int line_num = 1;\n    int find_result = 0;\n\n    fp = fopen(\"test.txt\", \"r\");\n\n    if (fp == NULL) {\n        return(-1);\n    }\n\n    while((ch = fgetc(fp)) != EOF) {\n        if (ch == '\\n') {\n            line_num++;\n        }\n\n        if (find_result == 0) {\n            if (ch == 'a') {\n                find_result = 1;\n            }\n        }\n        else {\n            if (ch == 'b') {\n                printf(\"Line Number [%d]\\n\", line_num);\n                find_result = 0;\n            }\n        }\n    }\n\n    if (fp) {\n        fclose(fp);\n    }\n\n    return(0);\n}\n<\/pre>\n<p>This code snippet shows how to print selected elements from a file. The code begins by including the stdio.h header file and declaring a main function. The code then opens a file called test.txt in read mode and assigns the file pointer to the fp variable. <\/p>\n<p>The code then enters a while loop which reads each character from the file until the end of the file is reached. The code checks if the character is a new line character and if so, increments the line_num variable. The code then checks if the character is an &#8216;a&#8217; and if so, sets the find_result variable to 1. If the find_result variable is 1, the code checks if the character is a &#8216;b&#8217; and if so, prints the line number and sets the find_result variable to 0. <\/p>\n<p>Finally, the code closes the file and returns 0. This code snippet shows how to print selected elements from a file.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction [ad_1] Printing selected elements from a file can be a useful way to quickly access the information you need. Whether you are looking to print out a specific line from a text file or a specific column from a CSV file, there are a few different methods you can use to achieve this. In &#8230; <a title=\"[Solved] How to print selected elements from file?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-print-selected-elements-from-file-2\/\" aria-label=\"More on [Solved] How to print selected elements from file?\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[493,349],"class_list":["post-179","post","type-post","status-publish","format-standard","hentry","category-solved","tag-file","tag-python"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] How to print selected elements from file? - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-how-to-print-selected-elements-from-file-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to print selected elements from file? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"Introduction [ad_1] Printing selected elements from a file can be a useful way to quickly access the information you need. 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