{"id":4672,"date":"2021-08-17T22:55:20","date_gmt":"2021-08-17T13:55:20","guid":{"rendered":"https:\/\/itips.krsw.biz\/?p=4672"},"modified":"2021-08-17T22:55:20","modified_gmt":"2021-08-17T13:55:20","slug":"numpy-ndarray-python-list-how-to-convert","status":"publish","type":"post","link":"https:\/\/itips.krsw.biz\/en\/numpy-ndarray-python-list-how-to-convert\/","title":{"rendered":"How to convert NumPy ndarray to Python list"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-python-800x450.jpg\" alt=\"How to convert NumPy ndarray to Python list\" \/><\/p>\n<div class=\"st-kaiwa-box kaiwaicon7 clearfix\"><div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2022\/06\/junior_face_r_sulk_nobg_hair0_cloth10_200px.png\" width=\"60px\"><div class=\"st-kaiwa-face-name\"><\/div><\/div><div class=\"st-kaiwa-area\"><div class=\"st-kaiwa-hukidashi\">How can we convert NumPy ndarray to Python list ?<\/div><\/div><\/div>\n<p>When we handle array data, We use <code>NumPy<\/code>.<\/p>\n<p>It is popular. But we don't remember how to convert NumPy ndarray to Python list.<\/p>\n<div class=\"st-kaiwa-box kaiwaicon7 clearfix\"><div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2022\/06\/junior_face_r_sulk_nobg_hair0_cloth10_200px.png\" width=\"60px\"><div class=\"st-kaiwa-face-name\"><\/div><\/div><div class=\"st-kaiwa-area\"><div class=\"st-kaiwa-hukidashi\">It should be like <code>NumPy(list)<\/code>.<\/div><\/div><\/div>\n<p>So today I will introduce <strong>&quot;<span class=\"st-mymarker-s\">How to convert NumPy ndarray to Python list<\/span>&quot;<\/strong><\/p>\n<div class=\"st-mybox  has-title \" style=\"background:#ffffff;border-color:#BDBDBD;border-width:2px;border-radius:5px;margin: 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#757575;font-weight:bold;background: #ffffff;\"><i class=\"fa fa-check-circle st-css-no\" aria-hidden=\"true\"><\/i>Author<\/p><div class=\"st-in-mybox\"><br \/>\n<div class=\"st-kaiwa-box kaiwaicon2 clearfix\"><div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2022\/06\/karasan_smile_200px_b.gif\" width=\"60px\"><div class=\"st-kaiwa-face-name\"><\/div><\/div><div class=\"st-kaiwa-area\"><div class=\"st-kaiwa-hukidashi\">Mid-carieer engineer (AI, system). Good at Python and SQL.<\/div><\/div><\/div><br \/>\n<\/div><\/div>\n<div class=\"st-minihukidashi-box \" ><p class=\"st-minihukidashi\" style=\"background:#3F51B5;color:#fff;margin: 0 0 0 -6px;font-size:80%;border-radius:30px;\"><span class=\"st-minihukidashi-arrow\" style=\"border-top-color: #3F51B5;\"><\/span><span class=\"st-minihukidashi-flexbox\">Advantage to read<\/span><\/p><\/div>\n<div class=\"clip-memobox \" style=\"background:#E8EAF6;color:#000000;\"><div class=\"clip-fonticon\" style=\"font-size:200%;color:#3F51B5;\"><i class=\"fa fa-thumbs-o-up st-css-no\" aria-hidden=\"true\"><\/i><\/div><div class=\"clip-memotext\" style=\"border-color:#3F51B5;\"><p style=\"color:#000000;\">You can understand \"How to convert NumPy ndarray to Python list\".<\/p><\/div><\/div>\n<p><!--more--><\/p>\n<p><\/br><\/p>\n<h2>How to convert Python list to NumPy ndarray<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2021\/03\/book_1615898374-800x533.jpg\" alt=\"\" \/><\/p>\n<p>In order to convert Python list to NumPy ndarray, we can use <code>numpy.array()<\/code>.<\/p>\n<p>Set list as first parameter in <code>numpy.array()<\/code>.<\/p>\n<pre class=\"prettyprint lang-python\">\nimport numpy as np\n\ndata_list1 = &#091;\n&#091;1,2,3&#093;,\n&#091;2,3,4&#093;,\n&#091;3,4,5&#093;,\n&#091;4,5,6&#093;\n&#093;\n\nnp_list = np.array(data_list1)\nprint(np_list)\nprint(type(np_list))\n\n# &#091;&#091;1 2 3&#093;\n#  &#091;2 3 4&#093;\n#  &#091;3 4 5&#093;\n#  &#091;4 5 6&#093;&#093;\n# &lt;class &#39;numpy.ndarray&#39;&gt;\n<\/pre>\n<div class=\"st-mybox  has-title st-mybox-class\" style=\"background:#fafafa;border-width:1px;border-radius:5px;margin: 25px 0 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#757575;font-weight:bold;text-shadow: #fff 3px 0px 0px, #fff 2.83487px 0.981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff 0.705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px 0.42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff 0.850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;\"><i class=\"fa fa-file-text-o st-css-no\" aria-hidden=\"true\"><\/i>reference<\/p><div class=\"st-in-mybox\">\n<li><a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.array.html\">numpy.array \u2014 NumPy v1.20 Manual<\/a><\/li>\n<\/div><\/div>\n<p><\/br><\/br><\/p>\n<h2>How to convert NumPy ndarray to Python list<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2021\/03\/book_1615898374-800x533.jpg\" alt=\"\" \/><\/p>\n<p>In order to convert NumPy ndarray to Python list, we can use <code>tolist()<\/code>.<\/p>\n<p>You can use <code>tolist()<\/code> as method of ndarray.<\/p>\n<pre class=\"prettyprint lang-python\">\ndata_list2 = np_list.tolist()\nprint(data_list2)\nprint(type(data_list2))\n\n# &#091;&#091;1, 2, 3&#093;, &#091;2, 3, 4&#093;, &#091;3, 4, 5&#093;, &#091;4, 5, 6&#093;&#093;\n# &lt;class &#39;list&#39;&gt;\n<\/pre>\n<div class=\"st-mybox  has-title st-mybox-class\" style=\"background:#fafafa;border-width:1px;border-radius:5px;margin: 25px 0 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#757575;font-weight:bold;text-shadow: #fff 3px 0px 0px, #fff 2.83487px 0.981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff 0.705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px 0.42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff 0.850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;\"><i class=\"fa fa-file-text-o st-css-no\" aria-hidden=\"true\"><\/i>reference<\/p><div class=\"st-in-mybox\">\n<li><a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.ndarray.tolist.html\">numpy.ndarray.tolist \u2014 NumPy v1.20 Manual<\/a><\/li>\n<\/div><\/div>\n<p><\/br><\/br><\/p>\n<h2>Conclusion<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/11\/h2-conclusion-800x450.jpg\" alt=\"\" \/><\/p>\n<p>Today I explained about <strong>&quot;<span class=\"st-mymarker-s\">How to convert NumPy ndarray to Python list<\/span>&quot;<\/strong>.<\/p>\n<p>In order to convert Python list to NumPy ndarray, we can use <code>numpy.array()<\/code>.<\/p>\n<p>And we can use <code>tolist()<\/code> to convert NumPy ndarray to Python list.<\/p>\n<p><\/br><\/p>\n<div class=\"st-kaiwa-box kaiwaicon2 clearfix\"><div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2022\/06\/karasan_smile_200px_b.gif\" width=\"60px\"><div class=\"st-kaiwa-face-name\"><\/div><\/div><div class=\"st-kaiwa-area\"><div class=\"st-kaiwa-hukidashi\">I don't remember it. So I usually google it.<\/div><\/div><\/div>\n<p><\/br><\/br><\/p>\n<div class=\"st-mybox  has-title st-mybox-class\" style=\"background:#E8F5E9;border-color:#43A047;border-width:3px;border-radius:5px;margin: 25px 0;\"><p class=\"st-mybox-title\" style=\"color:#006400;font-weight:bold;text-shadow: #fff 3px 0px 0px, #fff 2.83487px 0.981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff 0.705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px 0.42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff 0.850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;\"><i class=\"fa fa fa-hand-o-right st-css-no\" aria-hidden=\"true\"><\/i>Read more<\/p><div class=\"st-in-mybox\"><br \/>\n\t\t\t<a href=\"https:\/\/itips.krsw.biz\/en\/bigquery-how-to-get-average-median-mode\/\" class=\"st-cardlink\">\n\t\t\t<div class=\"kanren st-cardbox\" >\n\t\t\t\t\t\t\t\t<dl class=\"clearfix\">\n\t\t\t\t\t<dt class=\"st-card-img\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"320\" height=\"180\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-db-320x180.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" srcset=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-db-320x180.jpg 320w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-db-640x360.jpg 640w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-db-800x450.jpg 800w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-db-768x432.jpg 768w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-db-1536x864.jpg 1536w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-db-400x225.jpg 400w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-db.jpg 1920w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t<\/dt>\n\t\t\t\t\t<dd>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h5 class=\"st-cardbox-t\">How to get average, median, mode value in BigQuery<\/h5>\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/dd>\n\t\t\t\t<\/dl>\n\t\t\t<\/div>\n\t\t\t<\/a>\n\t\t\t<br \/>\n\t\t\t<a href=\"https:\/\/itips.krsw.biz\/en\/macos-big-sur-issue-list-summary\/\" class=\"st-cardlink\">\n\t\t\t<div class=\"kanren st-cardbox\" >\n\t\t\t\t\t\t\t\t<dl class=\"clearfix\">\n\t\t\t\t\t<dt class=\"st-card-img\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"320\" height=\"180\" src=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-mac-320x180.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" srcset=\"https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-mac-320x180.jpg 320w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-mac-640x360.jpg 640w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-mac-800x450.jpg 800w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-mac-768x432.jpg 768w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-mac-1536x864.jpg 1536w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-mac-400x225.jpg 400w, https:\/\/itips.krsw.biz\/wp-content\/uploads\/2020\/10\/h2-mac.jpg 1920w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t<\/dt>\n\t\t\t\t\t<dd>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h5 class=\"st-cardbox-t\">macOS Big Sur issue list summary<\/h5>\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/dd>\n\t\t\t\t<\/dl>\n\t\t\t<\/div>\n\t\t\t<\/a>\n\t\t\t<br \/>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>How can we convert NumPy ndarray to Python list ? When we handle array data, We use NumPy. It is pop &#8230; <\/p>\n","protected":false},"author":1,"featured_media":2919,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"en_US","_original_post":"https:\/\/itips.krsw.biz\/?p=4242","footnotes":""},"categories":[6],"tags":[78],"class_list":["post-4672","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","tag-numpy","en-US"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to convert NumPy ndarray to Python list - ITips\u30b7\u30b9\u30c6\u30e0\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u30ba<\/title>\n<meta name=\"description\" content=\"How can we convert NumPy ndarray to Python list ?When we handle array data, We use NumPy.It is popular. 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