datasets/v2.2.2/en/repository_structure.html

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<h1 class="relative group"><a id="structure-your-repository" class="header-link block pr-1.5 text-lg no-hover:hidden with-hover:absolute with-hover:p-1.5 with-hover:opacity-0 with-hover:group-hover:opacity-100 with-hover:right-full" href="#structure-your-repository"><span><svg class="" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" width="1em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 256"><path d="M167.594 88.393a8.001 8.001 0 0 1 0 11.314l-67.882 67.882a8 8 0 1 1-11.314-11.315l67.882-67.881a8.003 8.003 0 0 1 11.314 0zm-28.287 84.86l-28.284 28.284a40 40 0 0 1-56.567-56.567l28.284-28.284a8 8 0 0 0-11.315-11.315l-28.284 28.284a56 56 0 0 0 79.196 79.197l28.285-28.285a8 8 0 1 0-11.315-11.314zM212.852 43.14a56.002 56.002 0 0 0-79.196 0l-28.284 28.284a8 8 0 1 0 11.314 11.314l28.284-28.284a40 40 0 0 1 56.568 56.567l-28.285 28.285a8 8 0 0 0 11.315 11.314l28.284-28.284a56.065 56.065 0 0 0 0-79.196z" fill="currentColor"></path></svg></span></a>
	<span>Structure your repository
	</span></h1>

<p>To host and share your dataset, you can create a dataset repository on the Hugging Face Dataset Hub and upload your data files.</p>
<p>This guide will show you how to structure your dataset repository when you upload it.
A dataset with a supported structure can be loaded automatically with <a href="/docs/datasets/v2.2.2/en/package_reference/loading_methods#datasets.load_dataset">load_dataset()</a>, and it will have a preview on its dataset page on the Hub.</p>
<p>Note that you can also include a <a href="dataset_script">python script</a> to define your dataset, for more flexibility.</p>


<div class="course-tip  bg-gradient-to-br dark:bg-gradient-to-r before:border-green-500 dark:before:border-green-800 from-green-50 dark:from-gray-900 to-white dark:to-gray-950 border border-green-50 text-green-700 dark:text-gray-400"><p>The following examples use CSV files, but you can use any supported format (text, JSON, JSON Lines, CSV, Parquet).</p></div>
<h2 class="relative group"><a id="main-usecase" class="header-link block pr-1.5 text-lg no-hover:hidden with-hover:absolute with-hover:p-1.5 with-hover:opacity-0 with-hover:group-hover:opacity-100 with-hover:right-full" href="#main-usecase"><span><svg class="" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" width="1em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 256"><path d="M167.594 88.393a8.001 8.001 0 0 1 0 11.314l-67.882 67.882a8 8 0 1 1-11.314-11.315l67.882-67.881a8.003 8.003 0 0 1 11.314 0zm-28.287 84.86l-28.284 28.284a40 40 0 0 1-56.567-56.567l28.284-28.284a8 8 0 0 0-11.315-11.315l-28.284 28.284a56 56 0 0 0 79.196 79.197l28.285-28.285a8 8 0 1 0-11.315-11.314zM212.852 43.14a56.002 56.002 0 0 0-79.196 0l-28.284 28.284a8 8 0 1 0 11.314 11.314l28.284-28.284a40 40 0 0 1 56.568 56.567l-28.285 28.285a8 8 0 0 0 11.315 11.314l28.284-28.284a56.065 56.065 0 0 0 0-79.196z" fill="currentColor"></path></svg></span></a>
	<span>Main use-case
	</span></h2>

<p>The simplest dataset structure has two files: <em>train.csv</em> and <em>test.csv</em>.</p>
<p>Your repository will also contain a <em>README.md</em> file, the <a href="dataset_card">dataset card</a> displayed on your dataset page.</p>

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	<pre><!-- HTML_TAG_START -->my_dataset_repository/
├── README.md
├── train.<span class="hljs-built_in">csv</span>
└── test.<span class="hljs-built_in">csv</span><!-- HTML_TAG_END --></pre></div>
<h2 class="relative group"><a id="splits-and-file-names" class="header-link block pr-1.5 text-lg no-hover:hidden with-hover:absolute with-hover:p-1.5 with-hover:opacity-0 with-hover:group-hover:opacity-100 with-hover:right-full" href="#splits-and-file-names"><span><svg class="" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" width="1em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 256"><path d="M167.594 88.393a8.001 8.001 0 0 1 0 11.314l-67.882 67.882a8 8 0 1 1-11.314-11.315l67.882-67.881a8.003 8.003 0 0 1 11.314 0zm-28.287 84.86l-28.284 28.284a40 40 0 0 1-56.567-56.567l28.284-28.284a8 8 0 0 0-11.315-11.315l-28.284 28.284a56 56 0 0 0 79.196 79.197l28.285-28.285a8 8 0 1 0-11.315-11.314zM212.852 43.14a56.002 56.002 0 0 0-79.196 0l-28.284 28.284a8 8 0 1 0 11.314 11.314l28.284-28.284a40 40 0 0 1 56.568 56.567l-28.285 28.285a8 8 0 0 0 11.315 11.314l28.284-28.284a56.065 56.065 0 0 0 0-79.196z" fill="currentColor"></path></svg></span></a>
	<span>Splits and file names
	</span></h2>

<p>🤗 Datasets automatically infers the train/validation/test splits of your dataset from the file names.
All the files that contain <strong>train</strong> in their names are considered part of the train split. The same idea applies to the test and validation split: </p>
<ul><li>All the files that contain <strong>test</strong> in their names are considered part of the test split.</li>
<li>All the files that contain <strong>valid</strong> in their names are considered part of the validation split.</li></ul>
<p>Here is an example where all the files are placed into a directory named <em>data</em>:</p>

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	<pre><!-- HTML_TAG_START -->my_dataset_repository/
├── README.md
└── data/
    ├── train.<span class="hljs-built_in">csv</span>
    ├── test.<span class="hljs-built_in">csv</span>
    └── valid.<span class="hljs-built_in">csv</span><!-- HTML_TAG_END --></pre></div>
<h2 class="relative group"><a id="multiple-files-per-split" class="header-link block pr-1.5 text-lg no-hover:hidden with-hover:absolute with-hover:p-1.5 with-hover:opacity-0 with-hover:group-hover:opacity-100 with-hover:right-full" href="#multiple-files-per-split"><span><svg class="" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" width="1em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 256"><path d="M167.594 88.393a8.001 8.001 0 0 1 0 11.314l-67.882 67.882a8 8 0 1 1-11.314-11.315l67.882-67.881a8.003 8.003 0 0 1 11.314 0zm-28.287 84.86l-28.284 28.284a40 40 0 0 1-56.567-56.567l28.284-28.284a8 8 0 0 0-11.315-11.315l-28.284 28.284a56 56 0 0 0 79.196 79.197l28.285-28.285a8 8 0 1 0-11.315-11.314zM212.852 43.14a56.002 56.002 0 0 0-79.196 0l-28.284 28.284a8 8 0 1 0 11.314 11.314l28.284-28.284a40 40 0 0 1 56.568 56.567l-28.285 28.285a8 8 0 0 0 11.315 11.314l28.284-28.284a56.065 56.065 0 0 0 0-79.196z" fill="currentColor"></path></svg></span></a>
	<span>Multiple files per split
	</span></h2>

<p>If one of your splits comprises several files, 🤗 Datasets can still infer whether it is the train/validation/ test split from the file name.
For example, if your <strong>train</strong> and <strong>test</strong> splits span several files:</p>

	<div class="code-block relative"><div class="absolute top-2.5 right-4"><button class="inline-flex items-center relative text-sm focus:text-green-500 cursor-pointer focus:outline-none transition duration-200 ease-in-out opacity-0 mx-0.5   text-gray-600 " title="code excerpt" type="button"><svg class="" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" fill="currentColor" focusable="false" role="img" width="1em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 32 32"><path d="M28,10V28H10V10H28m0-2H10a2,2,0,0,0-2,2V28a2,2,0,0,0,2,2H28a2,2,0,0,0,2-2V10a2,2,0,0,0-2-2Z" transform="translate(0)"></path><path d="M4,18H2V4A2,2,0,0,1,4,2H18V4H4Z" transform="translate(0)"></path><rect fill="none" width="32" height="32"></rect></svg>
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	Copied</div></button></div>
	<pre><!-- HTML_TAG_START -->my_dataset_repository/
├── README.md
├── train_0.<span class="hljs-built_in">csv</span>
├── train_1.<span class="hljs-built_in">csv</span>
├── train_2.<span class="hljs-built_in">csv</span>
├── train_3.<span class="hljs-built_in">csv</span>
├── test_0.<span class="hljs-built_in">csv</span>
└── test_1.<span class="hljs-built_in">csv</span><!-- HTML_TAG_END --></pre></div>
<p>Just make sure that all the files of your <strong>train</strong> set have <strong>train</strong> in their names (same for test and validation).
It doesn’t matter if you add a prefix or suffix to <strong>train</strong> in the file name (like <em>my_train_file_00001.csv</em>, for example).
🤗 Datasets can still infer the appropriate split.</p>
<p>For convenience, you can also place your data files into different directories. In this case, the split name is inferred from the directory name.</p>

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	<pre><!-- HTML_TAG_START -->my_dataset_repository/
├── README.md
└── data/
    ├── train/
    │   ├── shard_0.<span class="hljs-built_in">csv</span>
    │   ├── shard_1.<span class="hljs-built_in">csv</span>
    │   ├── shard_2.<span class="hljs-built_in">csv</span>
    │   └── shard_3.<span class="hljs-built_in">csv</span>
    └── test/
        ├── shard_0.<span class="hljs-built_in">csv</span>
        └── shard_1.<span class="hljs-built_in">csv</span><!-- HTML_TAG_END --></pre></div>
<h2 class="relative group"><a id="custom-split-names" class="header-link block pr-1.5 text-lg no-hover:hidden with-hover:absolute with-hover:p-1.5 with-hover:opacity-0 with-hover:group-hover:opacity-100 with-hover:right-full" href="#custom-split-names"><span><svg class="" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" width="1em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 256"><path d="M167.594 88.393a8.001 8.001 0 0 1 0 11.314l-67.882 67.882a8 8 0 1 1-11.314-11.315l67.882-67.881a8.003 8.003 0 0 1 11.314 0zm-28.287 84.86l-28.284 28.284a40 40 0 0 1-56.567-56.567l28.284-28.284a8 8 0 0 0-11.315-11.315l-28.284 28.284a56 56 0 0 0 79.196 79.197l28.285-28.285a8 8 0 1 0-11.315-11.314zM212.852 43.14a56.002 56.002 0 0 0-79.196 0l-28.284 28.284a8 8 0 1 0 11.314 11.314l28.284-28.284a40 40 0 0 1 56.568 56.567l-28.285 28.285a8 8 0 0 0 11.315 11.314l28.284-28.284a56.065 56.065 0 0 0 0-79.196z" fill="currentColor"></path></svg></span></a>
	<span>Custom split names
	</span></h2>

<p>If you have other data files in addition to the traditional train/validation/test sets, you must use the following structure.
Follow the file name format exactly for this type of structure: <em>data/&lt;split_name&gt;-xxxxx-of-xxxxx.csv</em>.
Here is an example with three splits: <strong>train</strong>, <strong>test</strong>, and <strong>random</strong>:</p>

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	<pre><!-- HTML_TAG_START -->my_dataset_repository/
├── README.md
└── data/
    ├── train<span class="hljs-string">-00000</span>-of<span class="hljs-string">-00003</span>.csv
    ├── train<span class="hljs-string">-00001</span>-of<span class="hljs-string">-00003</span>.csv
    ├── train<span class="hljs-string">-00002</span>-of<span class="hljs-string">-00003</span>.csv
    ├── test<span class="hljs-string">-00000</span>-of<span class="hljs-string">-00001</span>.csv
    ├── random<span class="hljs-string">-00000</span>-of<span class="hljs-string">-00003</span>.csv
    ├── random<span class="hljs-string">-00001</span>-of<span class="hljs-string">-00003</span>.csv
    └── random<span class="hljs-string">-00002</span>-of<span class="hljs-string">-00003</span>.csv<!-- HTML_TAG_END --></pre></div>
<h2 class="relative group"><a id="multiple-configuration-wip" class="header-link block pr-1.5 text-lg no-hover:hidden with-hover:absolute with-hover:p-1.5 with-hover:opacity-0 with-hover:group-hover:opacity-100 with-hover:right-full" href="#multiple-configuration-wip"><span><svg class="" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" width="1em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 256"><path d="M167.594 88.393a8.001 8.001 0 0 1 0 11.314l-67.882 67.882a8 8 0 1 1-11.314-11.315l67.882-67.881a8.003 8.003 0 0 1 11.314 0zm-28.287 84.86l-28.284 28.284a40 40 0 0 1-56.567-56.567l28.284-28.284a8 8 0 0 0-11.315-11.315l-28.284 28.284a56 56 0 0 0 79.196 79.197l28.285-28.285a8 8 0 1 0-11.315-11.314zM212.852 43.14a56.002 56.002 0 0 0-79.196 0l-28.284 28.284a8 8 0 1 0 11.314 11.314l28.284-28.284a40 40 0 0 1 56.568 56.567l-28.285 28.285a8 8 0 0 0 11.315 11.314l28.284-28.284a56.065 56.065 0 0 0 0-79.196z" fill="currentColor"></path></svg></span></a>
	<span>Multiple configuration (WIP)
	</span></h2>

<p>You can specify different configurations of your dataset (for example, if a dataset contains different languages) with one directory per configuration.</p>
<p>These structures are not supported yet, but are a work in progress:</p>

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	<pre><!-- HTML_TAG_START -->my_dataset_repository/
├── README.md
├── en/
│   ├── train.<span class="hljs-built_in">csv</span>
│   └── test.<span class="hljs-built_in">csv</span>
└── fr/
    ├── train.<span class="hljs-built_in">csv</span>
    └── test.<span class="hljs-built_in">csv</span><!-- HTML_TAG_END --></pre></div>
<p>Or with one directory per split:</p>

	<div class="code-block relative"><div class="absolute top-2.5 right-4"><button class="inline-flex items-center relative text-sm focus:text-green-500 cursor-pointer focus:outline-none transition duration-200 ease-in-out opacity-0 mx-0.5   text-gray-600 " title="code excerpt" type="button"><svg class="" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" fill="currentColor" focusable="false" role="img" width="1em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 32 32"><path d="M28,10V28H10V10H28m0-2H10a2,2,0,0,0-2,2V28a2,2,0,0,0,2,2H28a2,2,0,0,0,2-2V10a2,2,0,0,0-2-2Z" transform="translate(0)"></path><path d="M4,18H2V4A2,2,0,0,1,4,2H18V4H4Z" transform="translate(0)"></path><rect fill="none" width="32" height="32"></rect></svg>
	<div class="absolute pointer-events-none transition-opacity bg-black text-white py-1 px-2 leading-tight rounded font-normal shadow left-1/2 top-full transform -translate-x-1/2 translate-y-2 opacity-0"><div class="absolute bottom-full left-1/2 transform -translate-x-1/2 w-0 h-0 border-black border-4 border-t-0" style="border-left-color: transparent; border-right-color: transparent; "></div>
	Copied</div></button></div>
	<pre><!-- HTML_TAG_START -->my_dataset_repository/
├── README<span class="hljs-selector-class">.md</span>
├── en/
│   ├── train/
│   │   ├── shard_0<span class="hljs-selector-class">.csv</span>
│   │   └── shard_1<span class="hljs-selector-class">.csv</span>
│   └── test/
│       ├── shard_0<span class="hljs-selector-class">.csv</span>
│       └── shard_1<span class="hljs-selector-class">.csv</span>
└── fr/
    ├── train/
    │   ├── shard_0<span class="hljs-selector-class">.csv</span>
    │   └── shard_1<span class="hljs-selector-class">.csv</span>
    └── test/
        ├── shard_0<span class="hljs-selector-class">.csv</span>
        └── shard_1.csv<!-- HTML_TAG_END --></pre></div>


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