coerce_range_list_param

astropy.io.votable.util.coerce_range_list_param(p, frames=None, numeric=True)

Coerces and/or verifies the object p into a valid range-list-format parameter.

As defined in Section 8.7.2 of Simple Spectral Access Protocol.

Parameters :

p : str or sequence

May be a string as passed verbatim to the service expecting a range-list, or a sequence. If a sequence, each item must be either:

• a numeric value
• a named value, such as, for example, ‘J’ for named spectrum (if the numeric kwarg is False)
• a 2-tuple indicating a range
• the last item my be a string indicating the frame of reference

frames : sequence of str, optional

A sequence of acceptable frame of reference keywords. If not provided, the default set in set_reference_frames will be used.

numeric : bool, optional

TODO

Returns :

parts : tuple

The result is a tuple:

• a string suitable for passing to a service as a range-list argument
• an integer counting the number of elements