def test_exec_sync():
# save results in a file
# create the VOTable result
# example from http://docs.astropy.org/en/stable/io/votable/
votable = VOTableFile()
resource = Resource()
votable.resources.append(resource)
table = Table(votable)
resource.tables.append(table)
table.fields.extend([
Field(votable, name="filename", datatype="char", arraysize="*"),
Field(votable, name="matrix", datatype="double", arraysize="2x2")])
table.create_arrays(2)
table.array[0] = ('test1.xml', [[1, 0], [0, 1]])
table.array[1] = ('test2.xml', [[0.5, 0.3], [0.2, 0.1]])
buffer = BytesIO()
votable.to_xml(buffer)
cadc = Cadc(auth_session=requests.Session())
response = Mock()
response.to_table.return_value = buffer.getvalue()
cadc.cadctap.search = Mock(return_value=response)
output_file = '{}/test_vooutput.xml'.format(tempfile.tempdir)
cadc.exec_sync('some query', output_file=output_file)
actual = parse(output_file)
assert len(votable.resources) == len(actual.resources) == 1
assert len(votable.resources[0].tables) ==\
len(actual.resources[0].tables) == 1
actual_table = actual.resources[0].tables[0]
try:
# TODO remove when astropy LTS upgraded
from astropy.utils.diff import report_diff_values
assert report_diff_values(table, actual_table, fileobj=sys.stdout)
except ImportError:
pass
def table_from_scratch():
from astropy.io.votable.tree import VOTableFile, Resource, Table, Field
# Create a new VOTable file...
votable = VOTableFile()
# ...with one resource...
resource = Resource()
votable.resources.append(resource)
# ... with one table
table = Table(votable)
resource.tables.append(table)
# Define some fields
table.fields.extend([
Field(votable, ID="filename", datatype="char"),
Field(votable, ID="matrix", datatype="double", arraysize="2x2")])
# Now, use those field definitions to create the numpy record arrays, with
# the given number of rows
table.create_arrays(2)
# Now table.array can be filled with data
table.array[0] = ('test1.xml', [[1, 0], [0, 1]])
table.array[1] = ('test2.xml', [[0.5, 0.3], [0.2, 0.1]])
# Now write the whole thing to a file.
# Note, we have to use the top-level votable file object
out = io.StringIO()
votable.to_xml(out)
def _run_test_from_scratch_example():
from astropy.io.votable.tree import VOTableFile, Resource, Table, Field
# Create a new VOTable file...
votable = VOTableFile()
# ...with one resource...
resource = Resource()
votable.resources.append(resource)
# ... with one table
table = Table(votable)
resource.tables.append(table)
# Define some fields
table.fields.extend([
Field(votable, name="filename", datatype="char", arraysize="*"),
Field(votable, name="matrix", datatype="double", arraysize="2x2")])
# Now, use those field definitions to create the numpy record arrays, with
# the given number of rows
table.create_arrays(2)
# Now table.array can be filled with data
table.array[0] = ('test1.xml', [[1, 0], [0, 1]])
table.array[1] = ('test2.xml', [[0.5, 0.3], [0.2, 0.1]])
assert table.array[0][0] == 'test1.xml'
def createTableFromObject(data, path="", names=[], dtypes=[], sizes=[]):
path_tmp = "/Users/cjimenez/Documents/PHD/data/tmp/"
# Create a new VOTable file...
votable = VOTableFile()
# ...with one resource...
resource = Resource()
votable.resources.append(resource)
# ... with one table
table = Table(votable)
resource.tables.append(table)
# Define some fields
fields = []
for idx, val in enumerate(names):
fields.append(Field(votable, name=val, datatype=dtypes[idx]))
table.fields.extend(fields)
# Now, use those field definitions to create the numpy record arrays, with
# the given number of rows
table.create_arrays(len(data))
# Now table.array can be filled with data
for idx, val in enumerate(data):
table.array[idx] = val
# Now write the whole thing to a file.
# Note, we have to use the top-level votable file object
votable.to_xml(path_tmp + path)
def exportData( dataTuple ,name): dataK, labelK, data_errorK, dataL, labelL = dataTuple # concatenate all arrays from dataTuple and add labels for errors data_full = np.concatenate( (np.concatenate( ( dataK, data_errorK ) , axis = 1 ), dataL), axis = 1 ) error_label = [] for i in labelK: error_label += [i + "_error"] label_full = labelK + error_label + labelL votable = VOTableFile() resource = Resource() votable.resources.append(resource) table = Table(votable) resource.tables.append(table) fields = [] for i in range( data_full.shape[1] ): fields += [Field( votable, name = label_full[i], datatype='float' )] table.fields.extend( fields ) table.create_arrays( data_full.shape[0] ) for i in range( data_full.shape[0] ): table.array[i] = tuple( data_full[i,:] ) votable.to_xml(name +".xml")
def __spectrum_to_votable(self, spectrum):
# Create a new VOTable file...
votable = VOTableFile()
# ...with one resource...
resource = Resource()
votable.resources.append(resource)
# ... with one table
table = Table(votable)
resource.tables.append(table)
# Define some fields
waveobs = Field(votable,
name="waveobs",
datatype="double",
unit="nm",
ucd="em.wl")
flux = Field(votable,
name="flux",
datatype="double",
unit="Jy",
ucd="phot.flux")
err = Field(votable,
name="err",
datatype="double",
ucd="stat.error;phot.flux")
table.fields.extend([waveobs, flux, err])
table.groups.extend([Group([flux, err])])
#import ipdb
#ipdb.set_trace()
# Now, use those field definitions to create the numpy record arrays, with
# the given number of rows
table.create_arrays(len(spectrum))
# Now table.array can be filled with data
table.array['waveobs'] = spectrum['waveobs']
table.array['flux'] = spectrum['flux']
table.array['err'] = spectrum['err']
#votable.set_all_tables_format('binary') # VOSpec does not understand binary format
return votable
def addCoords(table):
"Take the fragmented ra and dec and create a decimal ra and dec field pair for each row"
print "Adding coords to table"
print "Original first table row: ", table.array[0]
#print table.array['RAh']
raField = Field(votable,
name="ra_deg",
datatype="float",
precision="6",
unit="deg",
ucd="pos.eq.ra;meta.main",
width="12")
decField = Field(votable,
name="dec_deg",
datatype="float",
precision="6",
unit="deg",
ucd="pos.eq.dec;meta.main",
width="13")
raVal = np.zeros(table.array.size)
decVal = np.zeros(table.array.size)
table.array = recfunctions.append_fields(table.array, "ra_deg", raVal)
table.array = recfunctions.append_fields(table.array, "dec_deg", decVal)
table.fields.append(raField)
table.fields.append(decField)
#print table.array[0]
for row in table.array:
raStr = "%sh%sm%ss" % (row['RAh'], row['RAm'], row['RAs'])
decStr = "%s%sd%sm%ss" % (row['DE_sign'], row['DEd'], row['DEm'],
row['DEs'])
coord = SkyCoord(raStr, decStr, frame='icrs')
row['ra_deg'] = coord.ra.deg
row['dec_deg'] = coord.dec.degree
print "Final first table row: ", table.array[0]
# Confirm that the data are 64-bit floats.
assert hdr['BITPIX'] == -64
fits_pixel_type = ''
if hdr['BITPIX'] == -64:
fits_pixel_type = 'double'
elif hdr['BITPIX'] == -32:
fits_pixel_type = 'float'
else:
raise RuntimeError('Unrecognized BITPIX value for file converstion')
# Create the FIELD elements
f1 = Field(t,
name='wavenumber',
datatype=fits_pixel_type,
ucd='em.wavenumber;em.MIR',
unit='cm-1')
f1.description = 'wavenumber merged over orders'
f2 = Field(t,
name='intensity',
datatype=fits_pixel_type,
ucd='phot.flux.density;em.MIR',
unit='erg.s-1.cm-1.sr-1')
f3 = Field(t,
name='intensity_err',
datatype=fits_pixel_type,
ucd='stat.error;phot.flux.density;em.MIR',
unit='erg.s-1.cm-1.sr-1')
def _to_table(self, vo_table):
'''
Return the current table as a VOT object
'''
table = VOTable(vo_table)
# Add keywords
for key in self.keywords:
if isinstance(self.keywords[key], basestring):
arraysize = '*'
else:
arraysize = None
param = Param(table, name=key, ID=key, value=self.keywords[key], arraysize=arraysize)
table.params.append(param)
# Define some fields
n_rows = len(self)
fields = []
for i, name in enumerate(self.names):
data = self.data[name]
unit = self.columns[name].unit
description = self.columns[name].description
dtype = self.columns[name].dtype
column_type = smart_dtype(dtype)
if data.ndim > 1:
arraysize = str(data.shape[1])
else:
arraysize = None
if column_type in type_dict:
datatype = type_dict[column_type]
elif column_type == np.int8:
warnings.warn("int8 unsupported - converting to int16")
datatype = type_dict[np.int16]
elif column_type == np.uint16:
warnings.warn("uint16 unsupported - converting to int32")
datatype = type_dict[np.int32]
elif column_type == np.uint32:
warnings.warn("uint32 unsupported - converting to int64")
datatype = type_dict[np.int64]
elif column_type == np.uint64:
raise Exception("uint64 unsupported")
else:
raise Exception("cannot use numpy type " + str(column_type))
if column_type == np.float32:
precision = 'E9'
elif column_type == np.float64:
precision = 'E17'
else:
precision = None
if datatype == 'char':
if arraysize is None:
arraysize = '*'
else:
raise ValueError("Cannot write vector string columns to VO files")
field = Field(vo_table, ID=name, name=name, \
datatype=datatype, unit=unit, arraysize=arraysize, \
precision=precision)
field.description = description
fields.append(field)
table.fields.extend(fields)
table.create_arrays(n_rows)
# Character columns are stored as object columns in the vo_table
# instance. Leaving the type as string should work, but causes
# a segmentation fault on MacOS X with Python 2.6 64-bit so
# we force the conversion to object type columns.
for name in self.names:
dtype = self.columns[name].dtype
column_type = smart_dtype(dtype)
# Add data to the table
# At the moment, null values in VO table are dealt with via a
# 'mask' record array
if column_type == np.string_:
table.array[name] = self.data[name].astype(np.object_)
if self._masked:
table.array.mask[name] = self.data[name].mask.astype(np.object_)
else:
if self.data[name].dtype.type == np.bytes_ and type(self.columns[name].null) != bytes:
table.array.mask[name] = (self.data[name] == \
self.columns[name].null.encode('utf-8')).astype(np.object_)
else:
table.array.mask[name] = (self.data[name] == \
self.columns[name].null).astype(np.object_)
else:
table.array[name] = self.data[name]
if self._masked:
table.array.mask[name] = self.data[name].mask
else:
table.array.mask[name] = self.data[name] == \
self.columns[name].null
table.name = self.table_name
return table
def sort_write(sortname, spect, fitsdict, filesort, space=3):
"""
Write out an xml and ascii file that contains the details of the file sorting.
By default, the filename is printed first, followed by the filetype.
After these, all parameters listed in the 'keyword' item in the
settings file will be printed
Parameters
----------
sortname : str
The filename to be used to save the list of sorted files
spect : dict
Properties of the spectrograph.
fitsdict : dict
Contains relevant information from fits header files
filesort : dict
Details of the sorted files
space : int
Keyword to set how many blank spaces to place between keywords
"""
msgs.info("Preparing to write out the data sorting details")
nfiles = fitsdict['filename'].size
# Specify which keywords to print after 'filename' and 'filetype'
prord = ['filename', 'frametype', 'target', 'exptime', 'naxis0', 'naxis1', 'filter1', 'filter2']
prdtp = ["char", "char", "char", "double", "int", "int", "char", "char"]
# Now insert the remaining keywords:
fkey = spect['keyword'].keys()
for i in fkey:
if i not in prord:
prord.append(i)
# Append the type of value this keyword holds
typv = type(fitsdict[i][0])
if typv is int or typv is np.int_:
prdtp.append("int")
elif isinstance(fitsdict[i][0], basestring) or typv is np.string_:
prdtp.append("char")
elif typv is float or typv is np.float_:
prdtp.append("double")
else:
msgs.bug("I didn't expect useful headers to contain type {0:s}".format(typv).replace('<type ', '').replace('>', ''))
# Open a VOTable for writing
votable = VOTableFile()
resource = Resource()
votable.resources.append(resource)
table = Table(votable)
resource.tables.append(table)
# Define VOTable fields
tabarr=[]
# Insert the filename and filetype first
for i in xrange(len(prord)):
tabarr.append(Field(votable, name=prord[i], datatype=prdtp[i], arraysize="*"))
table.fields.extend(tabarr)
table.create_arrays(nfiles)
filtyp = filesort.keys()
for i in xrange(nfiles):
values = ()
for pr in prord:
if pr == 'frametype':
addval = ""
for ft in filtyp:
if i in filesort[ft]:
if len(addval) != 0: addval += ","
addval += ft
addval = (addval,)
else: addval = (fitsdict[pr][i],)
values = values + addval
table.array[i] = values
#osspl = sortname.split('.')
#if len(osspl) > 1:
# fname = sortname
#else:
fname = sortname+'.xml'
votable.to_xml(fname)
msgs.info("Successfully written sorted data information file:"+msgs.newline() +
"{0:s}".format(fname))
# ASCII file (JXP)
jxpord = ['filename', 'date', 'frametype', 'target', 'exptime', 'binning',
'dichroic', 'disperser', 'cdangle', 'decker']
# Generate the columns
clms = []
for pr in jxpord:
try:
lidx = prord.index(pr)
except ValueError:
msgs.warn('{:s} keyword not used'.format(pr))
else:
clm = []
for i in xrange(nfiles):
clm.append(table.array[i][lidx])
clms.append(Column(clm, name=pr))
# Create Table
jxp_tbl = tTable(clms)
# Write
jxp_name = fname.replace('.xml', '.lst')
jxp_tbl.write(jxp_name, format='ascii.fixed_width')
return
name="imageFile",
ucd="meta.file;meta.fits",
datatype="char",
arraysize="255",
value="atlas-cdfs.fits"),
Param(votable,
name="Reference frequency",
ucd="em.freq;meta.main",
datatype="float",
unit="Hz",
value="1.408e+08")
])
table.fields.extend([
Field(votable,
name="island_id",
datatype="char",
unit="--",
arraysize="15"),
Field(votable,
name="component_id",
datatype="char",
unit="--",
arraysize="4"),
Field(votable,
name="component_name",
datatype="char",
unit="",
arraysize="26"),
Field(votable,
name="ra_hms_cont",
datatype="char",
def visibility(request):
now = datetime.datetime.now()
html = "<html><body>It is now %s.</body></html>" % now
# Create a new VOTable file...
votable = VOTableFile()
# ...with one resource...
resource = Resource()
votable.resources.append(resource)
# ... with one table
table = Table(votable)
resource.tables.append(table)
resource.description ="European Space Astronomy Centre. INTEGRAL SOC - " \
"Object Visibility Simple Access Protocol (ObjVisSAP)"
resource.infos.append(Info(name="QUERY_STATUS", value="OK"))
resource.infos.append(Info(name="SERVICE PROTOCOL", value="1.0"))
resource.infos.append(Info(name="REQUEST", value="queryData"))
resource.infos.append(
Info(name="s_ra", value="%s" % request.GET.get("s_ra")))
resource.infos.append(
Info(name="s_dec", value="%s" % request.GET.get("s_dec")))
resource.infos.append(
Info(name="t_min", value="%s" % request.GET.get("t_min")))
resource.infos.append(
Info(name="t_max", value="%s" % request.GET.get("t_max")))
# Define some fields
# table.fields.extend([
# Field(votable, name="filename", datatype="char", arraysize="*"),
# Field(votable, name="matrix", datatype="double", arraysize="2x2")])
table.fields.extend([
Field(votable,
name="t_start",
datatype="double",
ucd="time.start",
utype="Char.TimeAxis.Coverage.Bounds.Limits.StartTime"),
Field(votable,
name="t_stop",
datatype="double",
ucd="time.start",
utype="Char.TimeAxis.Coverage.Bounds.Limits.StartTime"),
Field(votable,
name="t_visibility",
datatype="double",
ucd="time.start",
utype="Char.TimeAxis.Coverage.Bounds.Limits.StartTime"),
])
results = VisibilityCalculator.getVisibilityIntervals(
request.GET.get("s_ra"), request.GET.get("s_dec"),
request.GET.get("t_min"), request.GET.get("t_max"))
number_of_intervals = len(results)
table.create_arrays(number_of_intervals)
for i in range(0, number_of_intervals):
table.array[i] = (results[i][0], results[i][1], results[i][2])
# Now write the whole thing to a file to be streamed
# Note, we have to use the top-level votable file object
xml_now = "/tmp/new_votable_%s.xml" % now
votable.to_xml(xml_now)
stream = open(xml_now).read()
os.remove(xml_now)
return HttpResponse(stream, content_type='text/xml')
def VOGetCapabilities(filename, outfile):
votable = VOTableFile()
parser = ElementTree.XMLParser(recover=True)
f = codecs.open(filename, 'r', 'utf-8')
string = f.read()
string = bytes(bytearray(
string,
encoding='utf-8')) ## force utf-8 encoding even if xml says otherwise
root = ElementTree.fromstring(string, parser)
for element in root:
res = element.tag
resid = str(res).split('}')[-1:][
0] # MM, note that we have to convert res to string first
# logger.debug(resid) ## debug
# if (res!=ElementTree.Comment):
if (resid != str(ElementTree.Comment)): # MM
# resid=re.sub(':','_',res)
resid = re.sub(':', '_', resid)
resource = Resource(name=res, ID=resid)
votable.resources.append(resource)
table = Table(votable)
resource.tables.append(table)
for param in element:
par = param.tag
parid = str(par).split('}')[-1:][0] # MM
value = param.text
if value is None:
listvalue = param.items()
value = listvalue
dt = type(value).__name__
if (dt == "str"):
dt = "char"
arraysize = "*"
table.params.extend([
# Param(votable, name=par, datatype=dt, value=value)])
Param(votable, name=parid, datatype=dt, value=value)
])
elif (dt == "list"):
if (len(value) > 0):
for tup in value:
table.params.extend([
# Param(votable, name=tup[0], datatype="char", value=tup[1])])
Param(votable,
name=tup[0].split('}')[-1:][0],
datatype="char",
value=tup[1])
])
# if (par=="Layer"):
if (parid == "Layer"):
# lresource = Resource(name=par,ID=par)
lresource = Resource(name=par, ID=parid) # MM
votable.resources.append(lresource)
ltable = Table(votable)
lresource.tables.append(ltable)
j = 0
data = []
for layer in param:
lay = layer.tag
layid = str(lay).split('}')[-1:][0] # MM
datalay = []
# if (lay=="Layer"):
if (layid == "Layer"): # MM
for field in layer:
fieldid = str(field.tag).split('}')[-1:][0]
if (j == 0):
ltable.fields.extend([
# Field(votable, name=field.tag, datatype="char", arraysize="*")])
Field(votable,
name=fieldid,
datatype="char",
arraysize="*")
])
else:
try:
# ltable.get_field_by_id_or_name(field.tag)
ltable.get_field_by_id_or_name(fieldid)
except:
ltable.fields.extend([
# Field(votable, name=field.tag, datatype="char", arraysize="*")])
Field(votable,
name=fieldid,
datatype="char",
arraysize="*")
])
if field.text == None:
field.text = "Empty"
datalay.append(field.text)
try:
i = i + 1
except:
i = 0
j = 1
if datalay != []:
data.append(datalay)
l = len(ltable.fields)
# nl = int(math.ceil((i)/l)+1) #this will only work if there are no nested layers
# print(nl) # so i'm commenting this out and replacing with simple len(data)
nl = len(data) #MM
# logger.debug(nl) ## debug
dim = nl * l - 1
for x in range(0, nl):
while len(data[x]) < l:
data[x].append('Empty')
try:
ltable.create_arrays(dim)
ltable.array = (np.ma.asarray(data, dtype='str'))
ltable.array.mask = False
except:
raise
votable.to_xml(outfile)
def test_data_file(self):
wh().get().RESULTS_PATH = os.path.dirname(os.path.realpath(__file__))
test_log("Testing the initialization...", self)
job_id = 1
fname = "test_data.dat"
model = results_model.objects.filter(job_id=job_id)
self.assertFalse(model)
d = data_file(1)
model = results_model.objects.filter(job_id=job_id)
self.assertEqual(len(model), 1)
test_log("Testing a simple file creation...", self)
file_name = os.path.join(wh().get().RESULTS_PATH, fname)
f = d.file(fname)
f.write("test")
f.close()
model = results_model.objects.filter(job_id=job_id)
self.assertEqual(wh().get().RESULTS_PATH,
model[0].resources.all().filter(name=fname)[0].path)
self.assertEqual(fname,
model[0].resources.all().filter(name=fname)[0].name)
self.assertTrue(os.path.isfile(file_name))
f = open(file_name)
fdata = f.read()
f.close()
self.assertEqual(fdata, "test")
os.remove(file_name)
test_log("Testing a plot addition...", self)
plot = plot_model.objects.create(name="test_plot",
job_id=job_id,
alg_name="test",
script="",
html="")
self.assertFalse(model[0].plots.all().filter(name="test_plot"))
d.add_plot(plot)
self.assertEqual(len(model[0].plots.all().filter(name="test_plot")), 1)
test_log("Testing a FITS file storage...", self)
n = np.arange(100.0)
hdu = fits.PrimaryHDU(n)
hdul = fits.HDUList([hdu])
d.save_fits(fname, hdul)
self.assertEqual(len(model[0].resources.all().filter(name=fname)), 2)
self.assertTrue(os.path.isfile(file_name))
os.remove(file_name)
test_log("Testing a VOTable file storage...", self)
votable = VOTableFile()
resource = Resource()
votable.resources.append(resource)
table = Table(votable)
resource.tables.append(table)
table.fields.extend([
Field(votable, name="filename", datatype="char", arraysize="*"),
Field(votable, name="matrix", datatype="double", arraysize="2x2")
])
table.create_arrays(2)
table.array[0] = ('test_1', [[1, 0], [0, 1]])
table.array[1] = ('test_2', [[0.5, 0.3], [0.2, 0.1]])
d.save_vot(fname, votable)
self.assertEqual(len(model[0].resources.all().filter(name=fname)), 3)
self.assertTrue(os.path.isfile(file_name))
os.remove(file_name)
def _to_table(self, vo_table):
'''
Return the current table as a VOT object
'''
table = VOTable(vo_table)
# Add keywords
for key in self.keywords:
if isinstance(self.keywords[key], basestring):
arraysize = '*'
else:
arraysize = None
param = Param(table,
name=key,
ID=key,
value=self.keywords[key],
arraysize=arraysize)
table.params.append(param)
# Define some fields
n_rows = len(self)
fields = []
for i, name in enumerate(self.names):
data = self.data[name]
unit = self.columns[name].unit
description = self.columns[name].description
dtype = self.columns[name].dtype
column_type = smart_dtype(dtype)
if data.ndim > 1:
arraysize = str(data.shape[1])
else:
arraysize = None
if column_type in type_dict:
datatype = type_dict[column_type]
elif column_type == np.int8:
warnings.warn("int8 unsupported - converting to int16")
datatype = type_dict[np.int16]
elif column_type == np.uint16:
warnings.warn("uint16 unsupported - converting to int32")
datatype = type_dict[np.int32]
elif column_type == np.uint32:
warnings.warn("uint32 unsupported - converting to int64")
datatype = type_dict[np.int64]
elif column_type == np.uint64:
raise Exception("uint64 unsupported")
else:
raise Exception("cannot use numpy type " + str(column_type))
if column_type == np.float32:
precision = 'F9'
elif column_type == np.float64:
precision = 'F17'
else:
precision = None
if datatype == 'char':
if arraysize is None:
arraysize = '*'
else:
raise ValueError(
"Cannot write vector string columns to VO files")
field = Field(vo_table, ID=name, name=name, \
datatype=datatype, unit=unit, arraysize=arraysize, \
precision=precision)
field.description = description
fields.append(field)
table.fields.extend(fields)
table.create_arrays(n_rows)
# Character columns are stored as object columns in the vo_table
# instance. Leaving the type as string should work, but causes
# a segmentation fault on MacOS X with Python 2.6 64-bit so
# we force the conversion to object type columns.
for name in self.names:
dtype = self.columns[name].dtype
column_type = smart_dtype(dtype)
# Add data to the table
# At the moment, null values in VO table are dealt with via a
# 'mask' record array
if column_type == np.string_:
table.array[name] = self.data[name].astype(np.object_)
if self._masked:
table.mask[name] = self.data[name].mask.astype(np.object_)
else:
table.mask[name] = (self.data[name] == \
self.columns[name].null).astype(np.object_)
else:
table.array[name] = self.data[name]
if self._masked:
table.mask[name] = self.data[name].mask
else:
table.mask[name] = self.data[name] == \
self.columns[name].null
table.name = self.table_name
return table
