{"id":26970,"date":"2022-12-21T14:15:05","date_gmt":"2022-12-21T08:45:05","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-python-get-instruction-none-closed\/"},"modified":"2022-12-21T14:15:05","modified_gmt":"2022-12-21T08:45:05","slug":"solved-python-get-instruction-none-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-python-get-instruction-none-closed\/","title":{"rendered":"[Solved] Python get instruction none [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-42354481\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"42354481\" data-parentid=\"42354069\" data-score=\"0\" 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 can use the <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/docs.python.org\/3\/reference\/expressions.html#boolean-operations\"><code>or<\/code> operator<\/a> to assign a &#8220;default value&#8221; to a variable. This works because <code>a or b<\/code> is equivalent to <code>a if a else b<\/code>. Thus you could write<\/p>\n<pre><code>lista = GETLISTA() or some_default\n<\/code><\/pre>\n<p>Notice, however, that this will also use <code>some_default<\/code> if <code>GETLISTA()<\/code> evaluates to an empty list <code>[]<\/code>, or any other &#8220;falsy&#8221; value, not only if it returns <code>None<\/code>. This may or may not be a problem in your case. Alternatively, use the ternary operator<\/p>\n<pre><code>lista = GETLISTA()\nlista = some_default if lista is None else lista\n<\/code><\/pre>\n<p>or a simple <code>if<\/code> check (slightly longer, but IMHO clearer than the ternary):<\/p>\n<pre><code>lista = GETLISTA()\nif lista is None:\n    lista = some_default\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">1<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Python get instruction none [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You can use the or operator to assign a &#8220;default value&#8221; to a variable. This works because a or b is equivalent to a if a else b. Thus you could write lista = GETLISTA() or some_default Notice, however, that this will also use some_default if GETLISTA() evaluates to an empty list [], or &#8230; <a title=\"[Solved] Python get instruction none [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-python-get-instruction-none-closed\/\" aria-label=\"More on [Solved] Python get instruction none [closed]\">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":[349,499,482],"class_list":["post-26970","post","type-post","status-publish","format-standard","hentry","category-solved","tag-python","tag-python-2-7","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 get instruction none [closed] - 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-get-instruction-none-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Python get instruction none [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You can use the or operator to assign a &#8220;default value&#8221; to a variable. This works because a or b is equivalent to a if a else b. Thus you could write lista = GETLISTA() or some_default Notice, however, that this will also use some_default if GETLISTA() evaluates to an empty list [], or ... 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