download_files_in_parallel(urls, cache='update', show_progress=True, timeout=None, sources=None, multiprocessing_start_method=None, pkgname='astropy')
Blocks until all files have downloaded. The result is a list of local file paths corresponding to the given urls.
The results will be stored in the cache under the values in urls
even if they are obtained from some other location via sources
. See :None:None:`~download_file` for details.
If a URL is unreachable, the downloading will grind to a halt and the exception will propagate upward, but an unpredictable number of files will have been successfully downloaded and will remain in the cache.
The URLs to retrieve.
Whether to use the cache (default is :None:None:`True`). If "update", always download the remote URLs to see if new data is available and store the result in cache.
The default was changed to "update"
and setting it to False
will print a Warning and set it to "update"
again, because the function will not work properly without cache. Using True
will work as expected.
The default was changed to True
and setting it to False
will print a Warning and set it to True
again, because the function will not work properly without cache.
Whether to display a progress bar during the download (default is :None:None:`True`)
Timeout for each individual requests in seconds (default is the configurable :None:None:`astropy.utils.data.Conf.remote_timeout`).
If provided, for each URL a list of URLs to try to obtain the file from. The result will be stored under the original URL. For any URL in this dictionary, the original URL will not be tried unless it is in this list; this is to prevent long waits for a primary server that is known to be inaccessible at the moment.
Useful primarily for testing; if in doubt leave it as the default. When using multiprocessing, certain anomalies occur when starting processes with the "spawn" method (the only option on Windows); other anomalies occur with the "fork" method (the default on Linux).
The package name to use to locate the download cache. i.e. for pkgname='astropy'
the default cache location is ~/.astropy/cache
.
The local file paths corresponding to the downloaded URLs.
Download multiple files in parallel from the given URLs.
The following pages refer to to this document either explicitly or contain code examples using this.
astropy.io.fits.hdu.hdulist.fitsopen
astropy.utils.data.export_download_cache
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