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#!/usr/bin/env python |
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"""Fuel dataset downloading utility.""" |
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import argparse |
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import importlib |
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import os |
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import fuel |
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from fuel import downloaders |
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from fuel.downloaders.base import NeedURLPrefix |
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url_prefix_message = """ |
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Some files for this dataset do not have a download URL. |
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Provide a URL prefix with --url-prefix to prepend to the filenames, |
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e.g. http://path.to/files/ |
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""".strip() |
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def main(args=None): |
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"""Entry point for `fuel-download` script. |
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This function can also be imported and used from Python. |
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Parameters |
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---------- |
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args : iterable, optional (default: None) |
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A list of arguments that will be passed to Fuel's downloading |
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utility. If this argument is not specified, `sys.argv[1:]` will |
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be used. |
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""" |
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built_in_datasets = dict(downloaders.all_downloaders) |
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if fuel.config.extra_downloaders: |
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for name in fuel.config.extra_downloaders: |
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extra_datasets = dict( |
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importlib.import_module(name).all_downloaders) |
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if any(key in built_in_datasets for key in extra_datasets.keys()): |
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raise ValueError('extra downloaders conflict in name with ' |
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'built-in downloaders') |
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built_in_datasets.update(extra_datasets) |
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parser = argparse.ArgumentParser( |
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description='Download script for built-in datasets.') |
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parent_parser = argparse.ArgumentParser(add_help=False) |
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parent_parser.add_argument( |
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"-d", "--directory", help="where to save the downloaded files", |
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type=str, default=os.getcwd()) |
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parent_parser.add_argument( |
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"--clear", help="clear the downloaded files", action='store_true') |
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subparsers = parser.add_subparsers() |
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download_functions = {} |
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for name, fill_subparser in built_in_datasets.items(): |
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subparser = subparsers.add_parser( |
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name, parents=[parent_parser], |
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help='Download the {} dataset'.format(name)) |
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# Allows the parser to know which subparser was called. |
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subparser.set_defaults(which_=name) |
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download_functions[name] = fill_subparser(subparser) |
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args = parser.parse_args() |
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args_dict = vars(args) |
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download_function = download_functions[args_dict.pop('which_')] |
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try: |
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download_function(**args_dict) |
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except NeedURLPrefix: |
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parser.error(url_prefix_message) |
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if __name__ == "__main__": |
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main() |
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mila-udem /
fuel
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