{"id":25001,"date":"2022-12-07T05:38:42","date_gmt":"2022-12-07T00:08:42","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-python-looping-code\/"},"modified":"2022-12-07T05:38:42","modified_gmt":"2022-12-07T00:08:42","slug":"solved-python-looping-code","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-python-looping-code\/","title":{"rendered":"[Solved] Python looping code"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-28201484\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"28201484\" data-parentid=\"28201421\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" 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>You miss the lines<\/p>\n<pre><code>if grade != -1:\n    numbers.append(grade)\n<\/code><\/pre>\n<p>after  <code>grade = int(grade)<\/code>. This adds the grade to the list <code>numbers<\/code>.<\/p>\n<h2>Review<\/h2>\n<ul>\n<li>Use <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.python.org\/dev\/peps\/pep-0008\/\">PEP8<\/a> (you can use pep8online.com) to check your code<\/li>\n<li>For unnamed input, I prefer <code>\"Largest is %i, smallest is %i\" % (max(numbers), min(numbers))<\/code><\/li>\n<li>You can use <code>sum<\/code> to sum up integers in a list<\/li>\n<li>If you add a shebang (the first line <code>#!\/usr\/bin\/env python<\/code>), then Linux users can execute your script directly like this: <code>.\/yourscript.py<\/code> instead of <code>python yourscript.py<\/code>.<\/li>\n<\/ul>\n<h2>Code<\/h2>\n<p>I would rather write the code like this:<\/p>\n<pre><code>#!\/usr\/bin\/env python\n\n\ndef get_grades():\n    \"\"\"Return a list of grades.\"\"\"\n    numbers = []\n    while True:\n        grade = int(input(\"Enter grade, -1 to end: \"))\n        if grade != -1:\n            numbers.append(grade)\n        else:\n            return numbers\n\n\nif __name__ == '__main__':\n    grades = get_grades()\n    if len(grades) != 0:\n        average = float(sum(grades)) \/ len(grades)\n        print('Largest is %i, smallest is %i.' % (max(grades), min(grades)))\n        print(\"Class average is %0.2f.\" % average)\n<\/code><\/pre>\n<h2>Reading error messages<\/h2>\n<p>You probably had the following:<\/p>\n<pre><code>$ python test.py \nEnter grade, -1 to end:1\nEnter grade, -1 to end: 2\nEnter grade, -1 to end: 3\nEnter grade, -1 to end: -1\nTraceback (most recent call last):\n  File \"test.py\", line 15, in &lt;module&gt;\n    print('Largest is {}, smallest is {}'.format(max(numbers), min(numbers)))\nValueError: max() arg is an empty sequence\n<\/code><\/pre>\n<p>Now you should first look for line number. This one says in <code>line 15<\/code> is something wrong. This is:<\/p>\n<pre><code>print('Largest is {}, smallest is {}'.format(max(numbers), min(numbers)))\n<\/code><\/pre>\n<p>Now you have to investigate further. What exactly is wrong? What could possibly go wrong in this line?<\/p>\n<p>Now you read<\/p>\n<pre><code>ValueError: max() arg is an empty sequence\n<\/code><\/pre>\n<p>That should look strange, because you checked <code>gradeCounter != 0<\/code>. Next, you would print the contents of the argument of max. This is empty, so adding to the list <code>numbers<\/code> did not work.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">2<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Python looping code <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You miss the lines if grade != -1: numbers.append(grade) after grade = int(grade). This adds the grade to the list numbers. Review Use PEP8 (you can use pep8online.com) to check your code For unnamed input, I prefer &#8220;Largest is %i, smallest is %i&#8221; % (max(numbers), min(numbers)) You can use sum to sum up integers &#8230; <a title=\"[Solved] Python looping code\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-python-looping-code\/\" aria-label=\"More on [Solved] Python looping code\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[349,482],"class_list":["post-25001","post","type-post","status-publish","format-standard","hentry","category-solved","tag-python","tag-python-3-x"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Python looping code - 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-python-looping-code\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Python looping code - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You miss the lines if grade != -1: numbers.append(grade) after grade = int(grade). 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