# get_pkg_data_filename¶

astropy.utils.data.get_pkg_data_filename(data_name, package=None, show_progress=True, remote_timeout=None)[source] [edit on github]

Retrieves a data file from the standard locations for the package and provides a local filename for the data.

This function is similar to get_pkg_data_fileobj but returns the file name instead of a readable file-like object. This means that this function must always cache remote files locally, unlike get_pkg_data_fileobj.

Parameters: data_name : str Name/location of the desired data file. One of the following: The name of a data file included in the source distribution. The path is relative to the module calling this function. For example, if calling from astropy.pkname, use 'data/file.dat' to get the file in astropy/pkgname/data/file.dat. Double-dots can be used to go up a level. In the same example, use '../data/file.dat' to get astropy/data/file.dat. If a matching local file does not exist, the Astropy data server will be queried for the file. A hash like that produced by compute_hash can be requested, prefixed by ‘hash/’ e.g. ‘hash/34c33b3eb0d56eb9462003af249eff28’. The hash will first be searched for locally, and if not found, the Astropy data server will be queried. package : str, optional If specified, look for a file relative to the given package, rather than the default of looking relative to the calling module’s package. show_progress : bool, optional Whether to display a progress bar if the file is downloaded from a remote server. Default is True. remote_timeout : float Timeout for the requests in seconds (default is the configurable astropy.utils.data.Conf.remote_timeout, which is 3s by default) filename : str A file path on the local file system corresponding to the data requested in data_name. urllib2.URLError, urllib.error.URLError If a remote file cannot be found. OSError If problems occur writing or reading a local file.

get_pkg_data_contents
returns the contents of a file or url as a bytes object
get_pkg_data_fileobj
returns a file-like object with the data

Examples

This will retrieve the contents of the data file for the astropy.wcs tests:

>>> from astropy.utils.data import get_pkg_data_filename
>>> fn = get_pkg_data_filename('data/3d_cd.hdr',
...                            package='astropy.wcs.tests')
>>> with open(fn) as f:

>>> from astropy.utils.data import get_pkg_data_filename