fetch_file#
- sklearn.datasets.fetch_file(url, folder=None, local_filename=None, sha256=None, n_retries=3, delay=1)[source]#
Fetch a file from the web if not already present in the local folder.
If the file already exists locally (and the SHA256 checksums match when provided), the path to the local file is returned without re-downloading.
Added in version 1.6.
- Parameters:
- urlstr
URL of the file to download.
- folderstr or Path, default=None
Directory to save the file to. If None, the file is downloaded in a folder with a name derived from the URL host name and path under scikit-learn data home folder.
- local_filenamestr, default=None
Name of the file to save. If None, the filename is inferred from the URL.
- sha256str, default=None
SHA256 checksum of the file. If None, no checksum is verified.
- n_retriesint, default=3
Number of retries when HTTP errors are encountered.
- delayint, default=1
Number of seconds between retries.
- Returns:
- file_pathPath
Full path of the downloaded file.
