# Data Loading Helper Classes and Types


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### DataLoader

>  DataLoader (path:Union[str,pathlib.Path],
>                  metadata_file_name:Optional[str]=None,
>                  custom_data_loader:Union[Callable,str,NoneType]=None)

*Load data from a file or a directory of files, while keeping track of
the metadata.*

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<tr>
<th></th>
<th><strong>Type</strong></th>
<th><strong>Default</strong></th>
<th><strong>Details</strong></th>
</tr>
</thead>
<tbody>
<tr>
<td>path</td>
<td>Union</td>
<td></td>
<td>path to the file or directory</td>
</tr>
<tr>
<td>metadata_file_name</td>
<td>Optional</td>
<td>None</td>
<td>name of the metadata file</td>
</tr>
<tr>
<td>custom_data_loader</td>
<td>Union</td>
<td>None</td>
<td>custom data loader function or name of module with custom data
loader</td>
</tr>
<tr>
<td><strong>Returns</strong></td>
<td><strong>DataLoader</strong></td>
<td></td>
<td></td>
</tr>
</tbody>
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