def check_is_loaded(search):
"""
Search the kernel pool variable names for a given string.
"""
try:
spice.gnpool(search, 0, 100)
except(spice.support_types.SpiceyError):
return False
return True
def query_kernel_pool(matchstr="*"):
"""
Collect multiple keywords from the naif kernel pool based on a
template string
Parameters
----------
matchstr : str
matchi_c formatted str
Returns
-------
: dict
python dictionary of naif keywords in {keyword:value} format.
"""
try:
svars = spice.gnpool(matchstr, 0, 100)
except Exception as e:
warnings.warn(f"kernel search for {matchstr} failed with {e}")
svars = []
svals = [duckpool(v) for v in svars]
return dict(zip(svars, svals))
def gen_frame_dict(mk, report=False):
#
# Frame names are as follows:
# r'FRAME_-?[0-9]*_NAME'
#
frame_dict = {}
spiceypy.furnsh(mk)
start = 1
n_items = 9999
template = 'FRAME_*_NAME'
try:
cvals = spiceypy.gnpool(template, start, n_items)
if report: print(f'Number of reference frames defined: {len(cvals)}')
except SpiceyError:
print('No frames definitions present')
return
#
# Okay, now we know something about the kernel pool
# variables of interest to us. Let's find out more...
#
for cval in cvals:
#
# We check the type of variable:
# C (character) or N (numeric), of each pool
# variable name in the cvals array. It has to
# be a character
#
start = 0
n_items = 20
[dim, type] = spiceypy.dtpool(cval)
if type == 'C':
cvars = spiceypy.gcpool(cval, start, n_items)
#
# The variable (list) should be unique
#
if len(cvars) > 1:
spiceypy.kclear()
raise Exception(f'Variable {cval} is incorrect')
#
# We build the frames dictionary
#
frmclass = spiceypy.gipool(cval.replace('NAME', 'CLASS'), start,
n_items)
frmid = spiceypy.gipool(cval.replace('NAME', 'CLASS_ID'), start,
n_items)
frmcentr = spiceypy.gipool(cval.replace('NAME', 'CENTER'), start,
n_items)
if frmclass[0] == 4:
try:
varname = cval.replace('FRAME','TKFRAME').replace('NAME', 'RELATIVE')
frmrelat = spiceypy.gcpool(varname, start, n_items)
except:
frmrelat = ['ERROR']
else:
frmrelat = ['N/A']
frame_dict[cvars[0]] = { 'name': cvars[0],
'class':frmclass[0],
'id': frmid[0],
'center': frmcentr[0],
'relative': frmrelat[0]
}
if report:
print(f' CLASS: {frmclass[0]} NAME: {cvars[0]} ')
else:
spiceypy.kclear()
raise Exception(f'Variable {cval} is incorrect')
spiceypy.kclear()
return frame_dict