set_maskbits

pydl.pydlutils.sdss.set_maskbits(idlutils_version='v5_5_33', maskbits_file=None)

Populate the maskbits cache.

Parameters:

idlutils_versionstr, optional

Fetch the sdssMaskbits.par file corresponding to this idlutils version.

maskbits_filestr, optional

Use an explicit file instead of downloading the official version. This should only be used for tests.

Returns:

dict

A dictionary of bitmasks suitable for caching.

Raises:

URLError

If the data file could not be retrieved.