def _parse_args(args):
# first try pulling out separate coordinates
c1 = args.pop('coord1', None)
c2 = args.pop('coord2', None)
cargs = (c1, c2)
# if either are None, check for a coordstr
if c1 is None or c2 is None:
coordstr = args.pop('coordstr', None)
cargs = (coordstr,)
if (c1 is None or c2 is None) and (coordstr is None):
# TODO: throw a error
raise ValueError("Shitty arguments, yo.")
# default units are degrees
c1u = u.Unit(args.pop('coord1unit', u.deg))
c2u = u.Unit(args.pop('coord2unit', u.deg))
to_system = args.pop('to')
from_system = args.pop('from')
# extra arguments to pass to the coordinate frames
fromargs = dict()
toargs = dict()
for k, v in args.items():
if k.startswith('from_'):
fromargs[k.split('from_')[1]] = v
if k.startswith('to_'):
toargs[k.split('to_')[1]] = v
fromargs['frame'] = from_system.lower()
# get the 'to' frame class
ToFrame = frame_transform_graph.lookup_name(to_system.lower())
c = SkyCoord(*cargs, unit=(c1u, c2u), **fromargs).transform_to(frame=ToFrame(**toargs))
comps = []
for compnm in c.representation_component_names:
compval = getattr(c, compnm)
uout = c.representation_component_units.get(compnm, None)
if uout is not None:
compval.to(uout)
comps.append((compnm, compval))
output = {}
for i, (compnm, comp) in enumerate(comps):
# container for information for this coordinate
this_coord = dict()
ip1s = str(i + 1)
if not isiterable(comp.value):
val = [comp.value]
else:
val = comp.value
this_coord['data'] = list(val)
this_coord['name'] = compnm
this_coord['unit'] = str(comp.unit)
output['coord' + ip1s] = this_coord
for fattr_nm in c.get_frame_attr_names():
output['frame_' + fattr_nm] = str(getattr(c, fattr_nm))
return output
