{"id":29882,"date":"2024-03-18T22:38:35","date_gmt":"2024-03-18T13:38:35","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/pytorch%e3%81%aedataloader%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e3%81%a9%e3%81%86%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2024-03-22T22:02:31","modified_gmt":"2024-03-22T13:02:31","slug":"pytorch%e3%81%aedataloader%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e3%81%a9%e3%81%86%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/pytorch%e3%81%aedataloader%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e3%81%a9%e3%81%86%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"PyTorch\u306edataloader\u306e\u4f7f\u3044\u65b9\u306f\u3069\u3046\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>PyTorch\u3067\u306f\u3001DataLoader\u306f\u30c7\u30fc\u30bf\u3092\u30ed\u30fc\u30c9\u3059\u308b\u305f\u3081\u306e\u30af\u30e9\u30b9\u3067\u3042\u308a\u3001\u30c7\u30fc\u30bf\u3092\u30e2\u30c7\u30eb\u306b\u7c21\u5358\u306b\u30ed\u30fc\u30c9\u3057\u3066\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306fDataLoader\u3092\u4f7f\u7528\u3059\u308b\u57fa\u672c\u7684\u306a\u624b\u9806\u3067\u3059\uff1a<\/p>\n<ol>\n<li>\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\uff1a\u6700\u521d\u306b\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30c7\u30fc\u30bf\u304c\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002PyTorch\u306b\u306ftorch.utils.data.Dataset\u30af\u30e9\u30b9\u304c\u7528\u610f\u3055\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u3001__len__\u304a\u3088\u3073__getitem__\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3057\u3066\u72ec\u81ea\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001torchvision.datasets\u306a\u3069\u306ePyTorch\u304c\u63d0\u4f9b\u3059\u308b\u7d44\u8fbc\u307f\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/li>\n<li>\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u30ed\u30fc\u30c9\u3059\u308b\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3001batch_size\uff08\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30b9\u30c6\u30c3\u30d7\u3054\u3068\u306b\u30ed\u30fc\u30c9\u3055\u308c\u308b\u30b5\u30f3\u30d7\u30eb\u6570\uff09\u3001shuffle\uff08\u5404\u30a8\u30dd\u30c3\u30af\u3067\u30c7\u30fc\u30bf\u3092\u30b7\u30e3\u30c3\u30d5\u30eb\u3059\u308b\u304b\u3069\u3046\u304b\uff09\u306a\u3069\u306e\u3044\u304f\u3064\u304b\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u3001torch.utils.data.DataLoader\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n<li>\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u306e\u53cd\u5fa9\uff1a\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3068\u3001\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30c7\u30fc\u30bf\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002for\u30eb\u30fc\u30d7\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53cd\u5fa9\u51e6\u7406\u3057\u3001\u5404\u53cd\u5fa9\u3067\u30d0\u30c3\u30c1\u306e\u30c7\u30fc\u30bf\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u306f\u3001\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092DataLoader\u3067\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u3092\u793a\u3059\u7c21\u5358\u306a\u4f8b\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> torch\r\n<span class=\"hljs-keyword\">from<\/span> torch.utils.data <span class=\"hljs-keyword\">import<\/span> Dataset, DataLoader\r\n\r\n<span class=\"hljs-comment\"># \u521b\u5efa\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u96c6\u7c7b<\/span>\r\n<span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">MyDataset<\/span>(<span class=\"hljs-title class_ inherited__\">Dataset<\/span>):\r\n    <span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title function_\">__init__<\/span>(<span class=\"hljs-params\">self, data<\/span>):\r\n        self.data = data\r\n        \r\n    <span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title function_\">__len__<\/span>(<span class=\"hljs-params\">self<\/span>):\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-built_in\">len<\/span>(self.data)\r\n    \r\n    <span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title function_\">__getitem__<\/span>(<span class=\"hljs-params\">self, index<\/span>):\r\n        <span class=\"hljs-keyword\">return<\/span> self.data[index]\r\n        \r\n<span class=\"hljs-comment\"># \u521b\u5efa\u6570\u636e\u96c6\u5bf9\u8c61<\/span>\r\ndata = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>, <span class=\"hljs-number\">4<\/span>, <span class=\"hljs-number\">5<\/span>]\r\ndataset = MyDataset(data)\r\n\r\n<span class=\"hljs-comment\"># \u521b\u5efa\u6570\u636e\u52a0\u8f7d\u5668\u5bf9\u8c61<\/span>\r\nbatch_size = <span class=\"hljs-number\">2<\/span>\r\nshuffle = <span class=\"hljs-literal\">True<\/span>\r\ndataloader = DataLoader(dataset, batch_size=batch_size, shuffle=shuffle)\r\n\r\n<span class=\"hljs-comment\"># \u8fed\u4ee3\u6570\u636e\u52a0\u8f7d\u5668<\/span>\r\n<span class=\"hljs-keyword\">for<\/span> batch <span class=\"hljs-keyword\">in<\/span> dataloader:\r\n    <span class=\"hljs-built_in\">print<\/span>(batch)\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u307e\u305a\u81ea\u4f5c\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u30af\u30e9\u30b9MyDataset\u3092\u4f5c\u6210\u3057\u3001\u30c7\u30fc\u30bf\u3092\u30ea\u30b9\u30c8\u3068\u3057\u3066\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002\u6b21\u306b\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u30c7\u30fc\u30bf\u3092\u6e21\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u30922\u306b\u8a2d\u5b9a\u3057\u3001\u30b7\u30e3\u30c3\u30d5\u30eb\u3092True\u306b\u3057\u305f\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8dataloader\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001for\u30eb\u30fc\u30d7\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30ed\u30fc\u30c0\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53cd\u5fa9\u51e6\u7406\u3057\u3001\u5404\u53cd\u5fa9\u3067\u30d0\u30c3\u30c1\u306e\u30c7\u30fc\u30bf\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u4f8b\u3067\u306f\u3001\u51fa\u529b\u7d50\u679c\u306f [1, 2] \u3068 [3, 4] \u306e2\u3064\u306e\u30d0\u30c3\u30c1\u30c7\u30fc\u30bf\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PyTorch\u3067\u306f\u3001DataLoader\u306f\u30c7\u30fc\u30bf\u3092\u30ed\u30fc\u30c9\u3059\u308b\u305f\u3081\u306e\u30af\u30e9\u30b9\u3067\u3042\u308a\u3001\u30c7\u30fc\u30bf\u3092\u30e2\u30c7\u30eb\u306b\u7c21\u5358\u306b\u30ed\u30fc\u30c9\u3057\u3066\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306fDataLoader\u3092\u4f7f\u7528\u3059\u308b\u57fa\u672c\u7684\u306a\u624b\u9806\u3067\u3059\uff1a \u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u30aa\u30d6\u30b8\u30a7 [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29882","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PyTorch\u306edataloader\u306e\u4f7f\u3044\u65b9\u306f\u3069\u3046\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/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:\/\/www.silicloud.com\/ja\/blog\/pytorch\u306edataloader\u306e\u4f7f\u3044\u65b9\u306f\u3069\u3046\u3067\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" 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