_Downloader.get_valid_download_info

_Downloader.get_valid_download_info(subregion_name, osm_file_format, download_dir=None, **kwargs)

Get information of downloading (or downloaded) data file.

The information includes a valid subregion name, a default filename, a URL and an absolute path where the data file is (to be) saved locally.

Parameters:

subregion_name (str) – name of a (sub)region available on a free download server
osm_file_format (str) – file format/extension of the OSM data available on the download server
download_dir (str or None) – directory for saving the downloaded file(s), defaults to None; when download_dir=None, it refers to the method cdd()
kwargs – [optional] parameters of pyhelpers.dirs.cd(), including mkdir``(default: ``False)

Returns:

valid subregion name, filename, download url and absolute file path

Return type:

tuple

Tests:

>>> from pydriosm.downloader import _Downloader
>>> import os

>>> d = _Downloader()

>>> valid_dwnld_info = d.get_valid_download_info('subregion_name', 'osm_file_format')
>>> valid_dwnld_info[0] == '<subregion_name_>'
True
>>> valid_dwnld_info[1] == '<download_url>'
True
>>> valid_dwnld_info[2] == '<download_url>'
True
>>> os.path.relpath(valid_dwnld_info[3])
'osm_data\<subregion_name_>\<download_url>'