def make_median(fnlist,outfile):
"""Creates a median image from a series of images.
Inputs:
fnlist -> List of strings pointing to fits images
outfile -> Location of resultant median image
"""
imagelist = []
datalist = []
for i in range(len(fnlist)):
imagelist.append(openfits(fnlist[i]))
datalist.append(imagelist[i][0].data)
datalist = np.array(datalist)
meddata = np.median(datalist,axis=0)
medhdu = PrimaryHDU(meddata)
medhdu.writeto(outfile,clobber=True)
for i in range(len(fnlist)):
imagelist[i].close()
return
def createFromScratch(self, phu, extensions=None):
"""
Creates an AstroData object from a collection of objects.
"""
lst = HDUList()
if phu is not None:
if isinstance(phu, PrimaryHDU):
lst.append(phu)
elif isinstance(phu, Header):
lst.append(PrimaryHDU(header=deepcopy(phu), data=DELAYED))
elif isinstance(phu, (dict, list, tuple)):
p = PrimaryHDU()
p.header.update(phu)
lst.append(p)
else:
raise ValueError(
"phu must be a PrimaryHDU or a valid header object")
# TODO: Verify the contents of extensions...
if extensions is not None:
for ext in extensions:
lst.append(ext)
return self.getAstroData(lst)
def hdu(self):
if self.wcs is None:
hdu = PrimaryHDU(self.value)
else:
hdu = PrimaryHDU(self.value, header=self.header)
hdu.header['BUNIT'] = self.unit.to_string(format='fits')
if 'beam' in self.meta:
hdu.header.update(self.meta['beam'].to_header_keywords())
return hdu
def hdu(self):
if self.wcs is None:
hdu = PrimaryHDU(self.value)
else:
hdu = PrimaryHDU(self.value, header=self.wcs.to_header())
hdu.header['BUNIT'] = self.unit.to_string(format='fits')
if 'beam' in self.meta:
hdu.header.update(self.meta['beam'].to_header_keywords())
return hdu
def test_dtypes(dask_array_in_mem, tmp_path, dtype):
filename = tmp_path / 'test.fits'
array = dask_array_in_mem.astype(dtype)
hdu = PrimaryHDU(data=array)
hdu.writeto(filename)
with fits.open(filename) as hdulist_new:
assert isinstance(hdulist_new[0].data, np.ndarray)
np.testing.assert_allclose(hdulist_new[0].data, array.compute())
def test_save_primary_hdu(dask_array_in_mem, tmp_path):
# Saving a Primary HDU directly
filename = tmp_path / 'test.fits'
hdu = PrimaryHDU(data=dask_array_in_mem)
hdu.writeto(filename)
with fits.open(filename) as hdulist_new:
assert isinstance(hdulist_new[0].data, np.ndarray)
np.testing.assert_allclose(hdulist_new[0].data,
dask_array_in_mem.compute())
def read_or_generate_image(filename_base: str,
config: Config = Config.instance(),
recipe: Optional[Callable[[], Tuple[np.ndarray,
Table]]] = None,
force_generate=False):
"""
For the 'recipe' either generate and write the image+catalogue or read existing output from disk
:param directory: where to put/read data
:param filename_base: what the files are called, minus extension
:param recipe: function generating your image and catalogue
:return: image, input_catalogue
"""
if not exists(config.image_folder):
mkdir(config.image_folder)
image_name = join(config.image_folder, filename_base + '.fits')
table_name = join(config.image_folder, filename_base + '.dat')
lock = get_lock(abspath(image_name))
with lock:
if (exists(image_name) and exists(table_name)) and not force_generate:
img = getdata_safer(image_name)
table = Table.read(table_name, format='ascii.ecsv')
else:
with work_in(config.scopesim_working_dir):
if not recipe:
recipe = predefined_images[filename_base]
img, table = recipe()
img = img.astype(np.float64, order='C', copy=False)
PrimaryHDU(img).writeto(image_name, overwrite=True)
table.write(table_name, format='ascii.ecsv', overwrite=True)
return img, table
def ad_to_hdulist(ad):
"""Creates an HDUList from an AstroData object."""
hdul = HDUList()
hdul.append(PrimaryHDU(header=ad.phu, data=DELAYED))
for ext in ad._nddata:
meta = ext.meta
header, ver = meta['header'], meta['ver']
wcs = ext.wcs
if isinstance(wcs, gWCS):
# We don't have access to the AD tags so see if it's an image
# Catch ValueError as any sort of failure
try:
wcs_dict = adwcs.gwcs_to_fits(ext, ad.phu)
except (ValueError, NotImplementedError) as e:
LOGGER.warning(e)
else:
# Must delete keywords if image WCS has been downscaled
# from a higher number of dimensions
for i in range(1, 5):
for kw in (f'CDELT{i}', f'CRVAL{i}', f'CUNIT{i}',
f'CTYPE{i}'):
if kw in header:
del header[kw]
for j in range(1, 5):
for kw in (f'CD{i}_{j}', f'PC{i}_{j}', f'CRPIX{j}'):
if kw in header:
del header[kw]
header.update(wcs_dict)
# Use "in" here as the dict entry may be (value, comment)
if 'APPROXIMATE' not in wcs_dict.get('FITS-WCS', ''):
wcs = None # There's no need to create a WCS extension
hdul.append(new_imagehdu(ext.data, header, 'SCI'))
if ext.uncertainty is not None:
hdul.append(new_imagehdu(ext.uncertainty.array, header, 'VAR'))
if ext.mask is not None:
hdul.append(new_imagehdu(ext.mask, header, 'DQ'))
if isinstance(wcs, gWCS):
hdul.append(wcs_to_asdftablehdu(ext.wcs, extver=ver))
for name, other in meta.get('other', {}).items():
if isinstance(other, Table):
hdul.append(table_to_bintablehdu(other))
elif isinstance(other, np.ndarray):
header = meta['other_header'].get(name, meta['header'])
hdul.append(new_imagehdu(other, header, name=name))
elif isinstance(other, NDDataObject):
hdul.append(new_imagehdu(other.data, meta['header']))
else:
raise ValueError("I don't know how to write back an object "
"of type {}".format(type(other)))
if ad._tables is not None:
for name, table in sorted(ad._tables.items()):
hdul.append(table_to_bintablehdu(table, extname=name))
return hdul
def tofits(filename, data, hdr=None, clobber=False):
"""simple pyfits wrapper to make saving fits files easier."""
hdu = PrimaryHDU(data)
if not (hdr is None):
hdu.header += hdr
hdulist = HDUList([hdu])
hdulist.writeto(filename, overwrite=clobber, output_verify='ignore')
def test_single_filename_fallback():
hdu = PrimaryHDU()
assert _get_source_identifiers_by_hdu(
[hdu], "/path/to/test_file.fits") == ['test_file.fits']
assert _get_source_identifiers_by_hdu(
[hdu, hdu],
"/path/to/test_file.fits") == ['test_file.fits', 'test_file.fits']
def align(hduls, name="SCI", reference=None):
"""
Aligns the source astronomical image(s) to the reference astronomical image
\b
:param hduls: list of fitsfiles
:return: list of fistfiles with <name> HDU aligned
"""
hduls_list = [hdul for hdul in hduls]
sources = [hdul[name] for hdul in hduls_list]
outputs = []
if reference is None:
reference = snr.snr(hduls_list, name)[name]
# click.echo(reference.header["ORIGNAME"])
# FIXME log ref name
np_ref = to_np(
reference,
"Cannot align to unexpected type {}; expected numpy array or FITS HDU")
for source in sources:
np_src = to_np(
source,
"Cannot align unexpected type {}; expected numpy array or FITS HDU"
)
# possibly unneccessary but unsure about scoping
output = np.array([])
output = astroalign.register(np_src, np_ref)[0]
if isinstance(source, HDU_TYPES):
output = PrimaryHDU(output, source.header)
outputs.append(HDUList([output]))
return (hdul for hdul in outputs)
def test_HDU_input(self):
hdu = PrimaryHDU(img, header=hdr)
output = input_data(hdu)
npt.assert_equal(img, output["data"])
npt.assert_equal(hdr, output["header"])
def fake_hdulist(extver=1, version=2, timesys="TDB", telescop="KEPLER"):
new_header = fake_header(extver, version, timesys, telescop)
return [
HDUList(hdus=[
PrimaryHDU(header=new_header),
BinTableHDU(header=new_header, name="LIGHTCURVE")
])
]
def plot_images(
results: List[Tuple[np.ndarray, np.ndarray, Table, float]]) -> None:
for i, (observed_image, residual_image, photometry_result,
sigma) in enumerate(results):
x_y_data = np.vstack(
(photometry_result['x_fit'], photometry_result['y_fit'])).T
if verbose:
print(f"Got σ={sigma} for the PSF")
print(
f'found {len(x_y_data)} out of {stars_in_cluster} stars with photometry'
)
if output:
PrimaryHDU(observed_image).writeto(
f'{output_folder}/observed_{i:02d}.fits', overwrite=True)
PrimaryHDU(residual_image).writeto(
f'{output_folder}/residual_{i:02d}.fits', overwrite=True)
write_ds9_regionfile(x_y_data,
f'{output_folder}/centroids_{i:02d}.reg')
# Visualization
plt.figure(figsize=(10, 10))
plt.imshow(observed_image, norm=LogNorm(), vmax=1E5)
plt.scatter(x_y_data[:, 0],
x_y_data[:, 1],
marker="o",
lw=1,
color=None,
edgecolors='red')
plt.title('observed')
plt.colorbar()
if output:
plt.savefig(f'{output_folder}/obsverved_{i:02d}.png')
plt.figure(figsize=(10, 10))
plt.imshow(residual_image, norm=LogNorm(), vmax=1E5)
plt.title('residual')
plt.colorbar()
if output:
plt.savefig(f'{output_folder}/residual{i:02d}.png')
plt.close('all')
def export_visibility_to_fits(vis: Visibility, fits_file: str):
hdu = HDUList([
PrimaryHDU(),
configuration_to_hdu(vis.configuration),
visibility_to_hdu(vis)
])
with open(fits_file, "w") as f:
hdu.writeto(f, checksum=True)
def test_HDU_input():
hdu = PrimaryHDU(img, header=hdr)
output = input_data(hdu)
npt.assert_equal(img, output["data"].value)
assert output['data'].unit == u.dimensionless_unscaled
npt.assert_equal(hdr, output["header"])
def test_priority():
hdu = PrimaryHDU()
hdu.header['SOURCEID'] = 'Target 1 SOURCEID'
hdu.header['OBJECT'] = 'Target 1 OBJECT'
assert _get_source_identifiers_by_hdu([hdu]) == ['Target 1 SOURCEID']
hdu2 = PrimaryHDU()
hdu2.header['SOURCEID'] = 'Target 2 SOURCEID'
hdu2.header['OBJECT'] = 'Target 2 OBJECT'
assert _get_source_identifiers_by_hdu(
[hdu, hdu2]) == ['Target 1 SOURCEID', 'Target 2 SOURCEID']
def test_HDU_input_withbunit():
hdr['BUNIT'] = 'K'
hdu = PrimaryHDU(img, header=hdr)
output = input_data(hdu)
npt.assert_equal(img, output["data"].value)
assert output['data'].unit == u.K
npt.assert_equal(hdr, output["header"])
def northupeastleft(filename='', data=None, header=None):
from astropy.io.fits import getdata, PrimaryHDU
if filename:
data, header = getdata(filename, header=True)
if header['cd1_1'] > 0:
data = np.fliplr(data)
header['cd1_1'] *= -1
print 'flipping around x'
if header['cd2_2'] < 0:
data = np.flipud(data)
header['cd2_2'] *= -1
print 'flipping around y'
if filename:
from os import remove
remove(filename)
out_fits = PrimaryHDU(data=data, header=header)
out_fits.writeto(filename, clobber=True, output_verify='fix')
else:
return data, header
def northupeastleft(filename='', data=None, header=None):
from astropy.io.fits import getdata, PrimaryHDU
if filename:
data, header = getdata(filename, header=True)
if header['cd1_1'] > 0:
data = np.fliplr(data)
header['cd1_1'] *= -1
print 'flipping around x'
if header['cd2_2'] < 0:
data = np.flipud(data)
header['cd2_2'] *= -1
print 'flipping around y'
if filename:
from os import remove
remove(filename)
out_fits = PrimaryHDU(data=data, header=header)
out_fits.writeto(filename, clobber=True, output_verify='fix')
else:
return data, header
def generate():
# TODO CHANGEME
gauss_15 = make_convolved_grid(15,
kernel=Gaussian2DKernel(x_stddev=2,
x_size=size,
y_size=size))
PrimaryHDU(gauss_15).writeto(f'output_files/grid_gauss_15.fits',
overwrite=True)
gauss_16 = make_convolved_grid(16,
kernel=Gaussian2DKernel(x_stddev=2,
x_size=size,
y_size=size))
PrimaryHDU(gauss_16).writeto(f'output_files/grid_gauss_16.fits',
overwrite=True)
airy_15 = make_convolved_grid(15,
kernel=AiryDisk2DKernel(radius=2,
x_size=size,
y_size=size))
PrimaryHDU(airy_15).writeto(f'output_files/grid_airy_15.fits',
overwrite=True)
airy_16 = make_convolved_grid(16,
kernel=AiryDisk2DKernel(radius=2,
x_size=size,
y_size=size))
PrimaryHDU(airy_16).writeto(f'output_files/grid_airy_16.fits',
overwrite=True)
airy_16_perturbed = \
make_convolved_grid(16, kernel=AiryDisk2DKernel(radius=2, x_size=size, y_size=size), perturbation=4.)
PrimaryHDU(airy_16_perturbed).writeto(
f'output_files/grid_airy_16_perturbed.fits', overwrite=True)
airy_15_large = make_convolved_grid(15,
kernel=AiryDisk2DKernel(radius=10,
x_size=size,
y_size=size))
PrimaryHDU(airy_15_large).writeto(f'output_files/grid_airy_15_large.fits',
overwrite=True)
import anisocado
hdus = anisocado.misc.make_simcado_psf_file([(0, 14)], [2.15],
pixelSize=0.004,
N=size)
image = hdus[2]
kernel = np.squeeze(image.data)
anisocado_15 = make_convolved_grid(15, kernel=kernel, perturbation=0)
PrimaryHDU(anisocado_15).writeto(f'output_files/grid_anisocado_15.fits',
overwrite=True)
anisocado_16 = make_convolved_grid(16, kernel=kernel, perturbation=1.2)
PrimaryHDU(anisocado_16).writeto(f'output_files/grid_anisocado_16.fits',
overwrite=True)
def _create_fits(self):
hdul = HDUList(PrimaryHDU())
h = hdul[0].header
h.append(Card('name', self.name))
self._cf_pre_hook(hdul)
self._cf_add_setup_info(hdul)
self._cf_post_setup_hook(hdul)
self._cf_add_summary_statistics(hdul)
self._cf_add_pipeline_steps(hdul)
self._cf_post_hook(hdul)
return hdul
def run_bsmem_using_image(datafile: str,
outputfile: str,
dim: int,
pixelsize: float,
imagehdu: fits.PrimaryHDU,
uvmax: float = None,
alpha: float = None) -> None:
"""Run bsmem using initial/prior image.
Args:
datafile: Input OIFITS data filename.
outputfile: Output FITS filename.
dim: Reconstructed image width (pixels).
pixelsize: Reconstructed image pixel size (mas).
imagehdu: FITS HDU containing initial/prior image.
uvmax: Maximum uv radius to select (waves).
alpha: Regularization hyperparameter.
"""
tempimage = tempfile.NamedTemporaryFile(suffix='.fits',
mode='wb',
delete=False)
imagehdu.writeto(tempimage.name, overwrite=True)
tempimage.close()
args = [
BSMEM, '--noui',
'--data=%s' % datafile, '--clobber',
'--output=%s' % outputfile,
'--dim=%d' % dim,
'--pixelsize=%f' % pixelsize,
'--sf=%s' % tempimage.name
]
if uvmax is not None:
args += ['--uvmax=%f' % uvmax]
if alpha is not None:
args += ['--autoalpha=3', '--alpha=%f' % alpha]
else:
args += ['--autoalpha=4']
fullstdout = os.path.splitext(outputfile)[0] + '-out.txt'
run_bsmem(args, fullstdout)
os.remove(tempimage.name)
def test_long_header(dask_array_in_mem, tmp_path):
# Make sure things work correctly if there is a long header in the HDU.
filename = tmp_path / 'test.fits'
# NOTE: we deliberately set up a long header here rather than add the
# keys one by one to hdu.header as adding the header in one go used to
# cause issues, so this acts as a regression test.
header = fits.Header()
for index in range(2048):
header[f'KEY{index:x}'] = 0.
hdu = PrimaryHDU(data=dask_array_in_mem, header=header)
hdu.writeto(filename)
with fits.open(filename) as hdulist_new:
assert len(hdulist_new[0].header) == 2053
assert isinstance(hdulist_new[0].data, np.ndarray)
np.testing.assert_allclose(hdulist_new[0].data,
dask_array_in_mem.compute())
def setup_class(self):
self.data1 = np.array(list(
zip([1, 2, 3, 4], ['a', 'b', 'c', 'd'], [2.3, 4.5, 6.7, 8.9])),
dtype=[('a', int), ('b', 'U1'), ('c', float)])
self.data2 = np.array(list(
zip([1.4, 2.3, 3.2, 4.7], [2.3, 4.5, 6.7, 8.9])),
dtype=[('p', float), ('q', float)])
hdu1 = PrimaryHDU()
hdu2 = BinTableHDU(self.data1, name='first')
hdu3 = BinTableHDU(self.data2, name='second')
self.hdus = HDUList([hdu1, hdu2, hdu3])
def trim_psf(indir, outdir, filename):
assert os.path.abspath(indir) != os.path.abspath(outdir)
infile = os.path.join(indir, filename)
outfile = os.path.join(outdir, filename)
fx = fits.open(infile)
hdus = HDUList()
#- HDU 0 XCOEFF - data unchanged but update keywords for less samples
xcoeff = fx[0].data
hdr = fx[0].header
hdr['NWAVE'] = 3 #- down from 11
hdr['CRPIX1'] = 23 #- 23=45//2+1, down from 113=225//2+1
hdr['CRPIX1'] = 23
hdr['CDELT1'] = 0.005 #- 5mm instead of 1mm
hdr['CDELT2'] = 0.005 #- 5mm instead of 1mm
hdr['PIXSIZE'] = 0.005 #- 5mm instead of 1mm
hdus.append(PrimaryHDU(xcoeff, header=hdr))
hdus.append(fx['YCOEFF'])
#- subsample spots
inspots = fx['SPOTS'].data
spots = np.zeros((3,3,45,45))
spots[0,0] = rebin_image(inspots[0,0], 5)
spots[1,0] = rebin_image(inspots[5,0], 5)
spots[2,0] = rebin_image(inspots[10,0], 5)
spots[0,1] = rebin_image(inspots[0,5], 5)
spots[1,1] = rebin_image(inspots[5,5], 5)
spots[2,1] = rebin_image(inspots[10,5], 5)
spots[0,2] = rebin_image(inspots[0,10], 5)
spots[1,2] = rebin_image(inspots[5,10], 5)
spots[2,2] = rebin_image(inspots[10,10], 5)
hdus.append(ImageHDU(spots, header=fx['SPOTS'].header))
#- subsample spots x,y locations
dx = fx['SPOTX'].data
hdus.append(ImageHDU(dx[::5, ::5], header=fx['SPOTX'].header))
dy = fx['SPOTY'].data
hdus.append(ImageHDU(dy[::5, ::5], header=fx['SPOTY'].header))
#- Fiberpos unchanged
hdus.append(fx['FIBERPOS'])
#- Subsample SPOTPOS and SPOTWAVE
d = fx['SPOTPOS'].data
hdus.append(ImageHDU(d[::5], header=fx['SPOTPOS'].header))
d = fx['SPOTWAVE'].data
hdus.append(ImageHDU(d[::5], header=fx['SPOTWAVE'].header))
hdus.writeto(outfile, clobber=True)
fx.close()
def save_fits(self, folder: str) -> str:
data = self.data.copy()
assert data.dtype == np.float32 and data.max() <= 1.0 and data.min() >= 0.0, f"{data.dtype} {data.max()} {data.min()}"
hdu = PrimaryHDU(
data=self.data,
header=self.fits_header,
)
l = HDUList([hdu])
path = join(folder, f"{self.key}.fits")
l.writeto(path, overwrite=True)
return path
def _prepare_hdulist(hdulist, default_extension='SCI', extname_parser=None):
new_list = []
highest_ver = 0
recognized = set()
if len(hdulist) > 1 or (len(hdulist) == 1 and hdulist[0].data is None):
# MEF file
# First get HDUs for which EXTVER is defined
for n, hdu in enumerate(hdulist):
if extname_parser:
extname_parser(hdu)
ver = hdu.header.get('EXTVER')
if ver not in (-1, None) and hdu.name:
highest_ver = max(highest_ver, ver)
elif not isinstance(hdu, PrimaryHDU):
continue
new_list.append(hdu)
recognized.add(hdu)
# Then HDUs that miss EXTVER
for hdu in hdulist:
if hdu in recognized:
continue
elif isinstance(hdu, ImageHDU):
highest_ver += 1
if 'EXTNAME' not in hdu.header:
hdu.header['EXTNAME'] = (default_extension,
'Added by AstroData')
if hdu.header.get('EXTVER') in (-1, None):
hdu.header['EXTVER'] = (highest_ver, 'Added by AstroData')
new_list.append(hdu)
recognized.add(hdu)
else:
# Uh-oh, a single image FITS file
new_list.append(PrimaryHDU(header=hdulist[0].header))
image = ImageHDU(header=hdulist[0].header, data=hdulist[0].data)
# Fudge due to apparent issues with assigning ImageHDU from data
image._orig_bscale = hdulist[0]._orig_bscale
image._orig_bzero = hdulist[0]._orig_bzero
for keyw in ('SIMPLE', 'EXTEND'):
if keyw in image.header:
del image.header[keyw]
image.header['EXTNAME'] = (default_extension, 'Added by AstroData')
image.header['EXTVER'] = (1, 'Added by AstroData')
new_list.append(image)
return HDUList(sorted(new_list, key=fits_ext_comp_key))
def test_OBJECT():
hdu = PrimaryHDU()
hdu.header['OBJECT'] = 'Target 1 OBJECT'
assert _get_source_identifiers_by_hdu([hdu]) == ['Target 1 OBJECT']
hdu2 = PrimaryHDU()
hdu2.header['OBJECT'] = 'Target 2 OBJECT'
assert _get_source_identifiers_by_hdu(
[hdu, hdu2]) == ['Target 1 OBJECT', 'Target 2 OBJECT']
def test_SOURCEID():
hdu = PrimaryHDU()
hdu.header['SOURCEID'] = 'Target 1 SOURCEID'
assert _get_source_identifiers_by_hdu([hdu]) == ['Target 1 SOURCEID']
hdu2 = PrimaryHDU()
hdu2.header['SOURCEID'] = 'Target 2 SOURCEID'
assert _get_source_identifiers_by_hdu(
[hdu, hdu2]) == ['Target 1 SOURCEID', 'Target 2 SOURCEID']
def pv_wedge(cube, center, length, min_theta, max_theta, ntheta=90, width=1):
'''
Create a PV slice from a wedge.
'''
y0, x0 = center
thetas = np.linspace(min_theta, max_theta, ntheta)
pv_slices = []
for i, theta in enumerate(thetas):
start_pt = (y0 - (length / 2.) * np.sin(theta),
x0 - (length / 2.) * np.cos(theta))
end_pt = (y0 + (length / 2.) * np.sin(theta),
x0 + (length / 2.) * np.cos(theta))
path = Path([start_pt, end_pt], width=width)
if i == 0:
pv_slice = extract_pv_slice(cube, path)
pv_path_slice, header = pv_slice.data, pv_slice.header
else:
pv_path_slice = extract_pv_slice(cube, path).data
pv_slices.append(pv_path_slice)
# Track the smallest shape
if i == 0:
path_length = pv_path_slice.shape[1]
else:
new_path_length = pv_path_slice.shape[1]
if new_path_length < path_length:
path_length = new_path_length
header["NAXIS1"] = path_length
# Now loop through and average together
avg_pvslice = np.zeros((cube.shape[0], path_length), dtype='float')
for pvslice in pv_slices:
avg_pvslice += pvslice[:, :path_length]
avg_pvslice /= float(ntheta)
return PrimaryHDU(avg_pvslice, header=header)
def test_file_handle(mode, dask_array_in_mem, tmp_path):
filename = tmp_path / 'test.fits'
hdu1 = PrimaryHDU(data=dask_array_in_mem)
hdu2 = ImageHDU(data=np.arange(10))
hdulist = fits.HDUList([hdu1, hdu2])
with filename.open(mode=mode) as fp:
hdulist.writeto(fp)
with fits.open(filename) as hdulist_new:
assert isinstance(hdulist_new[0].data, np.ndarray)
np.testing.assert_allclose(hdulist_new[0].data,
dask_array_in_mem.compute())
assert isinstance(hdulist_new[1].data, np.ndarray)
np.testing.assert_allclose(hdulist_new[1].data, np.arange(10))
def writeFits(self, filename):
"""Write to FITS file
This API is intended for use by the LSST data butler, which handles
translating the desired identity into a filename.
Parameters
----------
filename : `str`
Filename of FITS file.
"""
from astropy.io.fits import HDUList, PrimaryHDU
fits = HDUList()
fits.append(PrimaryHDU())
self._writeImpl(fits)
with open(filename, "wb") as fd:
fits.writeto(fd)