def __init__(self, *args, **kw):
# Accept an optional "epoch" keyword argument.
epoch = kw.pop('epoch', None)
if epoch is not None:
self.epoch = epoch = Date(epoch)
if kw:
raise TypeError('"epoch" is the only keyword argument'
' you can use during %s instantiation' %
(type(self).__name__))
# Interpret a single-argument initialization.
if len(args) == 1:
a = args[0]
if isinstance(a, Body):
a = Equatorial(a.a_ra, a.a_dec, epoch=a.a_epoch)
for cls in (Equatorial, Ecliptic, Galactic):
if isinstance(a, cls):
# If the user omitted an "epoch" keyword, then
# use the epoch of the other object.
if epoch is None:
self.epoch = epoch = a.epoch
# If we are initialized from another of the same
# kind of coordinate and epoch, simply copy the
# coordinates and epoch into this new object.
if isinstance(self, cls) and epoch == a.epoch:
self.set(*a.get())
return
# Otherwise, convert.
ra, dec = a.to_radec()
if epoch != a.epoch:
ra, dec = _libastro.precess(a.epoch, epoch, ra, dec)
self.from_radec(ra, dec)
return
raise TypeError(
'a single argument used to initialize %s() must be either'
' a coordinate or a Body, not an %r' % (type(a).__name__, ))
# Two arguments are interpreted as (ra, dec) or (lon, lat).
elif len(args) == 2:
self.set(*args)
if epoch is None:
self.epoch = epoch = Date(J2000)
else:
raise TypeError('to initialize %s you must pass either a Body,'
' another coordinate, or two coordinate values,'
' but not: %r' % (
type(self).__name__,
args,
))
def __init__(self, *args, **kw):
# Accept an optional "epoch" keyword argument.
epoch = kw.pop('epoch', None)
if epoch is not None:
self.epoch = epoch = Date(epoch)
if kw:
raise TypeError('"epoch" is the only keyword argument'
' you can use during %s instantiation'
% (type(self).__name__))
# Interpret a single-argument initialization.
if len(args) == 1:
a = args[0]
if isinstance(a, Body):
a = Equatorial(a.a_ra, a.a_dec, epoch = a.a_epoch)
for cls in (Equatorial, Ecliptic, Galactic):
if isinstance(a, cls):
# If the user omitted an "epoch" keyword, then
# use the epoch of the other object.
if epoch is None:
self.epoch = epoch = a.epoch
# If we are initialized from another of the same
# kind of coordinate and epoch, simply copy the
# coordinates and epoch into this new object.
if isinstance(self, cls) and epoch == a.epoch:
self.set(*a.get())
return
# Otherwise, convert.
ra, dec = a.to_radec()
if epoch != a.epoch:
ra, dec = _libastro.precess(
a.epoch, epoch, ra, dec
)
self.from_radec(ra, dec)
return
raise TypeError(
'a single argument used to initialize %s() must be either'
' a coordinate or a Body, not an %r' % (type(a).__name__,)
)
# Two arguments are interpreted as (ra, dec) or (lon, lat).
elif len(args) == 2:
self.set(*args)
if epoch is None:
self.epoch = epoch = Date('2000')
else:
raise TypeError(
'to initialize %s you must pass either a Body,'
' another coordinate, or two coordinate values,'
' but not: %r' % (type(self).__name__, args,)
)