def save_CIF(self, fpath):
"""Saving model into cif file"""
cif_object = model.cif()
cif_block = model.block()
cif_object["BEA"] = cif_block
space_group = sgtbx.space_group(self.iucr_structure.space_group())
#unit cell:
cell_pars = self.iucr_structure.unit_cell().parameters()
cif_block["_cell_length_a"] = cell_pars[0]
cif_block["_cell_length_b"] = cell_pars[1]
cif_block["_cell_length_c"] = cell_pars[2]
cif_block["_cell_angle_alpha"] = cell_pars[3]
cif_block["_cell_angle_beta"] = cell_pars[4]
cif_block["_cell_angle_gamma"] = cell_pars[5]
space_group_type = self.iucr_structure.space_group_info().type()
cif_block["_symmetry_cell_setting"] = \
space_group.crystal_system().lower()
cif_block["_symmetry_Int_Tables_number"] = space_group_type.number()
cif_block["_symmetry_space_group_name_H-M"] = \
space_group_type.lookup_symbol()
#cif_block["_space_group.name_Hall"] = space_group_type.hall_symbol()
symop_loop = model.loop(
header = ("_symmetry_equiv_pos_as_xyz",)
)
for symop_id, symop in enumerate(space_group):
symop_loop.add_row(("'{}'".format(symop.as_xyz()),))
struct_loop = model.loop(
header = ("_atom_site_label",
"_atom_site_type_symbol",
"_atom_site_fract_x",
"_atom_site_fract_y",
"_atom_site_fract_z",
"_atom_site_U_iso_or_equiv"))
for scatterer in self.iucr_structure.scatterers():
struct_loop.add_row(
(scatterer.label,
scatterer.scattering_type,
scatterer.site[0],
scatterer.site[1],
scatterer.site[2],
scatterer.u_iso))
cif_block.add_loop(symop_loop)
cif_block.add_loop(struct_loop)
with open(fpath,'w') as fobj:
fobj.write(cif_object.__str__())
def run():
inp = iotbx.pdb.input(source_info=None, lines=quartz_as_cif.split('\n'))
modelm = mmtbx.model.manager(model_input=inp)
quartz_structure = modelm.get_xray_structure()
# Examine the site symmetry of each scatterer
for scatterer in quartz_structure.scatterers():
print "%s:" % scatterer.label, "%8.4f %8.4f %8.4f" % scatterer.site
site_symmetry = quartz_structure.site_symmetry(scatterer.site)
print " point group type:", site_symmetry.point_group_type()
print " special position operator:", site_symmetry.special_op_simplified(
)
# Let's use scattering factors from the International Tables
modelm.setup_scattering_dictionaries(scattering_table="it1992")
quartz_structure = modelm.get_xray_structure()
# Now calculate some structure factors
f_calc = quartz_structure.structure_factors(d_min=2).f_calc()
f_calc_sq = f_calc.as_intensity_array()
f_calc_sq.show_summary().show_array()
# Output the intensities to a CIF file
# This probably should be deprecated as well
f_calc_sq.as_cif_simple(array_type="calc",
data_name="quartz",
out=open("quartz-intensities.cif", "wb"))
# Create an instance of model.cif, equivalent to a full CIF file
cif = model.cif()
# Create an instance of model.block, equivalent to a CIF data block
cif_block = model.block()
# Add the unit cell parameters to the cif_block
unit_cell = quartz_structure.unit_cell()
params = unit_cell.parameters()
cif_block["_cell_length_a"] = params[0]
cif_block["_cell_length_b"] = params[1]
cif_block["_cell_length_c"] = params[2]
cif_block["_cell_angle_alpha"] = params[3]
cif_block["_cell_angle_beta"] = params[4]
cif_block["_cell_angle_gamma"] = params[5]
cif_block["_cell_volume"] = unit_cell.volume()
# now we will create a CIF loop containing the space group symmetry operations
space_group = quartz_structure.space_group()
symop_loop = model.loop(header=("_space_group_symop_id",
"_space_group_symop_operation_xyz"))
for symop_id, symop in enumerate(space_group):
symop_loop.add_row((symop_id + 1, symop.as_xyz()))
# add the symop_loop and space group items to the cif_block
space_group_type = quartz_structure.space_group_info().type()
cif_block["_space_group_crystal_system"] = space_group.crystal_system(
).lower()
cif_block["_space_group_IT_number"] = space_group_type.number()
cif_block["_space_group_name_H-M_alt"] = space_group_type.lookup_symbol()
cif_block["_space_group_name_Hall"] = space_group_type.hall_symbol()
cif_block.add_loop(symop_loop)
# add cif_block to the cif object with the data block name "quartz"
cif["quartz"] = cif_block
# print the cif object to standard output
print cif
cif_model = iotbx.cif.reader(input_string=quartz_as_cif).model()
cif_model["quartz"]["_diffrn_radiation_probe"] = "xray"
cif_model["quartz"]["_space_group_crystal_system"] = "Monoclinic"
cif_model["quartz"]["_space_group_IT_number"] = "one hundred and eighty"
symop_loop.add_column("_space_group_symop_sg_id", [1] * 12)
cif_model["quartz"].add_loop(symop_loop)
pdbx_v50 = validation.smart_load_dictionary(name="mmcif_pdbx_v50.dic")
print "validation"
cif_model.validate(pdbx_v50, show_warnings=True)
def __init__(self, cif_object=None):
self._model = cif_object
if self._model is None:
self._model = model.cif()
self._current_block = None
self._current_save = None
def exercise_cif_model():
loop = model.loop()
loop["_loop_a"] = flex.double((1,2,3))
loop.add_columns({'_loop_c': [4,5,6],
'_loop_b': ['7','8','9']})
loop.add_row((4,7,'0'))
try: loop["_loop_invalid"] = (7,8)
except AssertionError: pass
else: raise Exception_expected
assert len(loop) == 3 # the number of columns (keys)
assert loop.size() == 4 # the number of rows (loop iterations)
assert list(loop.keys()) == ['_loop_a', '_loop_c', '_loop_b']
try: loop["no_leading_underscore"] = 3
except Sorry: pass
else: raise Exception_expected
loop2 = model.loop(header=("_loop2_a", "_loop2_b"), data=(1,2,3,4,5,6))
assert list(loop2.keys()) == ["_loop2_a", "_loop2_b"]
assert list(loop2.values()) == [flex.std_string(['1', '3', '5']),
flex.std_string(['2', '4', '6'])]
assert list(loop2.iterrows()) == [
{'_loop2_a': '1', '_loop2_b': '2'},
{'_loop2_a': '3', '_loop2_b': '4'},
{'_loop2_a': '5', '_loop2_b': '6'}]
loop3 = model.loop(
data={
"_loop3_a": flex.int((-1, 2, 3)),
"_loop3_b": flex.double((1.1, 2.2, 3.3)),
"_loop3_c": flex.size_t((1, 2, 3)),
}
)
for k in "abc":
assert isinstance(loop3["_loop3_%s" % k], flex.std_string)
#
block = model.block()
block["_tag"] = 3
block["_tag1"] = "'a string'"
block["_another_tag"] = 3.142
assert "_tag" in block
assert "_tag1" in block
assert "_another_tag" in block
assert block["_tag"] == '3'
assert block["_tag1"] == "'a string'"
assert block["_another_tag"] == "3.142"
assert list(block.keys()) == ['_tag', '_tag1', '_another_tag']
assert list(block.values()) == ["3", "'a string'", "3.142"]
try: block["no_leading_underscore"] = 3
except Sorry: pass
else: raise Exception_expected
block.add_loop(loop)
assert len(block) == 6
assert list(block.items()) == [
('_tag', '3'), ('_tag1', "'a string'"), ('_another_tag', '3.142'),
('_loop_a', flex.std_string(['1', '2', '3', '4'])),
('_loop_c', flex.std_string(['4', '5', '6', '7'])),
('_loop_b', flex.std_string(['7', '8', '9', '0']))]
block['_loop_c'] = [11, 12, 13, 14]
assert '_loop_c' in list(block.loops['_loop'].keys())
assert list(block['_loop_c']) == ['11', '12', '13', '14']
#
block1 = model.block()
block1["_tag"] = 2
block1["_tag2"] = 1.2
loop3 = model.loop(header=("_loop_a", "_loop_b"), data=(6,5,4,3,2,1))
block1.add_loop(loop2)
block1.add_loop(loop3)
block.update(block1)
for key in block._items.keys():
assert key in ['_another_tag', '_tag2', '_tag', '_tag1']
for value in block._items.values():
assert value in ['3.142', '1.2', '2', "'a string'"]
assert list(block.loops.keys()) == ['_loop', '_loop2']
assert list(block.keys()) == ['_tag', '_tag1', '_another_tag', '_loop_a',
'_loop_b','_tag2', '_loop2_a', '_loop2_b']
assert list(block['_loop_a']) == ['6', '4', '2']
assert list(block['_loop_b']) == ['5', '3', '1']
assert list(block['_loop2_a']) == ['1', '3', '5']
assert list(block['_loop2_b']) == ['2', '4', '6']
try: block['_loop_c']
except KeyError: pass
else: raise Exception_expected
bad_loop = model.loop(header=("_a", "_b"), data=(1,2,3,4,5,6))
block1.add_loop(bad_loop)
assert "_a" in block1
assert "_b" in block1
assert list(block.get_looped_item("_loop_a")) == ['6', '4', '2']
try: block.get_looped_item("_tag", value_error=ValueError)
except ValueError: pass
else: raise Exception_expected
assert list(block.get_looped_item("_tag", value_error=None)) == ['2']
try: block.get_looped_item("_none_existent")
except KeyError: pass
else: raise Exception_expected
assert block.get_looped_item(
"_none_existent", key_error=None, default="my_default") == "my_default"
assert block.get_single_item("_tag") == "2"
try: block.get_single_item("_loop_a")
except ValueError: pass
else: raise Exception_expected
assert block.get_single_item(
"_loop_a", value_error=None, default="default") == "default"
try: block.get_single_item("_none_existent")
except KeyError: pass
else: raise Exception_expected
assert block.get_single_item("_none_existent", key_error=None) is None
#
cif_model = model.cif()
cif_model["fred"] = block
assert "fred" in cif_model
assert cif_model["frEd"] is block
assert cif_model["fred"]["_Tag"] == '2'
cif_model["fred"]["_tag"] = 4
assert cif_model["fred"]["_tag"] == '4'
del cif_model["fred"]["_tAg"]
try: cif_model["fred"]["_tag"]
except KeyError: pass
else: raise Exception_expected
cm = cif_model.deepcopy()
l = cm["fred"]["_loop"]
del cm["Fred"]["_loop_B"]
assert "_loop_b" not in cm["fred"]
assert "_loop_b" not in l
assert "_loop" in cm["fred"].loops
del cm["fred"]["_loop_a"]
assert "_loop" not in cm["fred"].loops
del cm["fred"]["_loop2"]
assert "_loop2" not in cm["fred"].loops
s = StringIO()
print(cm, file=s)
assert not show_diff(s.getvalue(),
"""\
data_fred
_tag1 'a string'
_another_tag 3.142
_tag2 1.2
""")
#
cm2 = cif_model.copy()
cm3 = cif_model.deepcopy()
assert cm2['fred']['_loop_a'] is cif_model ['fred']['_loop_a']
assert cm3['fred']['_loop_a'] is not cif_model ['fred']['_loop_a']
b2 = copy.copy(block)
b3 = copy.deepcopy(block)
assert b2['_loop_b'] is block['_loop_b']
assert b3['_loop_b'] is not block['_loop_b']
l2 = loop.copy()
l3 = loop.deepcopy()
assert l2['_loop_b'] is loop['_loop_b']
assert l3['_loop_b'] is not loop['_loop_b']
#
s = StringIO()
cif_model.show(out=s)
assert not show_diff(s.getvalue(),
"""\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
s = StringIO()
cif_model.show(out=s, indent=" ", data_name_field_width=0)
assert not show_diff(s.getvalue(),
"""\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
s = StringIO()
cif_model.show(out=s, indent="", indent_row=" ", data_name_field_width=0)
assert not show_diff(s.getvalue(),
"""\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
cif_model.sort(recursive=True)
s = StringIO()
cif_model.show(out=s)
assert not show_diff(s.getvalue(),
"""\
data_fred
_another_tag 3.142
_tag1 'a string'
_tag2 1.2
loop_
_loop_a
_loop_b
6 5
4 3
2 1
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
save = model.save()
save.add_loop(l3)
save['_tag1'] = 3
block = model.block()
block['bob'] = save
cm = model.cif({'fred': block})
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(),
"""data_fred
save_bob
loop_
_loop_a
_loop_c
_loop_b
1 11 7
2 12 8
3 13 9
4 14 0
_tag1 3
save_
""")
b1 = model.block()
b1['_a'] = 1
b1['_b'] = 2
b1['_c'] = 3
b2 = model.block()
b2['_a'] = 2
b2['_c'] = 3
b2['_d'] = 4
b3 = b1.difference(b2)
b4 = b2.difference(b1)
for item in b3.items():
assert item in [('_b', '2'), ('_a', '2')]
for item in b4.items():
assert item in [('_d', '4'), ('_a', '1')]
l = model.loop(data=dict(_loop_d=(1,2),_loop_e=(3,4),_loop_f=(5,6)))
assert l == l
assert l == l.deepcopy()
assert l != l2
assert l != l3
l2 = model.loop(data=dict(_loop_d=(1,2,3),_loop_e=(3,4,5),_loop_f=(5,6,7)))
b1.add_loop(l)
b2.add_loop(l2)
b5 = b1.difference(b2)
assert b5['_loop'] == l2
l = model.loop(data=OrderedDict((('_loop_a',(1,21,-13)),
('_loop_b',(-221.3,3.01,4.246)),
('_loop_c',("a","b","cc")))))
b = model.block()
b.add_loop(l)
cm = model.cif({'fred':b})
s = StringIO()
cm.show(out=s, loop_format_strings={'_loop':'% 4i% 8.2f %s'})
assert not show_diff(s.getvalue(),"""\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.30 a
21 3.01 b
-13 4.25 cc
""")
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(),"""\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
21 3.01 b
-13 4.246 cc
""")
l.add_row((".", "?", "."))
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(),"""\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
21 3.01 b
-13 4.246 cc
. ? .
""")
l.delete_row(index=1)
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(),"""\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
-13 4.246 cc
. ? .
""")
l2 = l.deepcopy()
l2.delete_row(index=0)
l2.delete_row(index=0)
l2.delete_row(index=0)
try: l2.show(out=s)
except AssertionError as e: pass
else: raise Exception_expected
l.clear()
try: l.show(out=s)
except AssertionError as e: pass
else: raise Exception_expected
#
loop = model.loop(data={"_a_1": ('string with spaces','nospaces'),
"_a_2": ('a', 'b')})
s = StringIO()
loop.show(out=s, align_columns=True)
assert not show_diff(s.getvalue(), """\
loop_
_a_1
_a_2
'string with spaces' a
nospaces b
""")
#
cb = model.block()
cm = model.cif()
cm["a"] = cb
cb["_b"] = ""
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(), """\
data_a
_b ''
""")
#
loop = model.loop(data=OrderedDict((
("_entity_poly.entity_id", ('1', '2', '3')),
("_entity_poly.pdbx_seq_one_letter_code", (
"TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR",
"""\
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
THVFRLKKWIQKVIDQFGE""",
"NGDFEEIPEE(TYS)LQ",
)),
("_entity_poly.pdbx_seq_one_letter_code_can", (
"TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR",
"""\
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
THVFRLKKWIQKVIDQFGE""",
"NGDFEEIPEEYLQ",
)),
("_entity_poly.pdbx_strand_id", ('L', 'H', 'I'))
)))
s = StringIO()
loop.show(out=s, align_columns=True)
s.seek(0)
assert not show_diff("\n".join(l.rstrip() for l in s.readlines()),"""\
loop_
_entity_poly.entity_id
_entity_poly.pdbx_seq_one_letter_code
_entity_poly.pdbx_seq_one_letter_code_can
_entity_poly.pdbx_strand_id
1 TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR L
2
;
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
THVFRLKKWIQKVIDQFGE
;
;
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
THVFRLKKWIQKVIDQFGE
;
H
3 NGDFEEIPEE(TYS)LQ NGDFEEIPEEYLQ I\
""")
#
cb = model.block()
cm = model.cif()
cm["a"] = cb
cb["_a"] = '1 "a" 2'
cb["_b"] = "1 'b' 3"
cb["_c"] = "O1'"
cb["_d"] = 'O2"'
cb["_e"] = """1 'a' "b" 3"""
s = StringIO()
print(cm, file=s)
s.seek(0)
assert not show_diff("\n".join(l.rstrip() for l in s.readlines()), """\
data_a
_a '1 "a" 2'
_b "1 'b' 3"
_c O1'
_d O2"
_e
;
1 'a' "b" 3
;
""")
# verify that what we wrote out above is valid CIF and we can read it back in
cm2 = iotbx.cif.reader(input_string=s.getvalue()).model()
cb2 = cm2["a"]
assert cb2["_a"] == cb["_a"]
assert cb2["_b"] == cb["_b"]
assert cb2["_c"] == cb["_c"]
assert cb2["_d"] == cb["_d"]
assert cb2["_e"].strip() == cb["_e"]
#
cm = iotbx.cif.reader(input_string="""\
data_a
loop_
_pdbx_refine_tls_group.id
_pdbx_refine_tls_group.refine_tls_id
_pdbx_refine_tls_group.selection
_pdbx_refine_tls_group.selection_details
1 1 ? "chain 'A' and (resid 2 through 15 )"
2 2 ? "chain 'A' and (resid 16 through 26 )"
3 3 ? "chain 'A' and (resid 27 through 43 )"
4 4 ? "chain 'B' and (resid 1 through 14 )"
5 5 ? "chain 'B' and (resid 15 through 20 )"
""").model()
print(cm)
#
cif_block = model.block()
loop_a = model.loop(header=("_a.1", "_a.2"), data=(1,2,3,4,5,6))
cif_block.add_loop(loop_a)
assert cif_block.get_loop("_a") is loop_a
assert cif_block.get_loop_or_row("_a") is loop_a
assert cif_block.get_loop("_b") is None
assert cif_block.get_loop_or_row("_b") is None
assert cif_block.get_loop("_b", default=loop_a) is loop_a
assert cif_block.get_loop_or_row("_b", default=loop_a) is loop_a
loop_a = cif_block.get_loop_with_defaults(
"_a", default_dict={"_a.2":".", "_a.3":"?", "_a.4":"."})
assert list(cif_block["_a.1"]) == ['1', '3', '5']
assert list(cif_block["_a.2"]) == ['2', '4', '6']
assert list(cif_block["_a.3"]) == ['?', '?', '?']
assert list(cif_block["_a.4"]) == ['.', '.', '.']
loop_a.add_row({"_a.3":"a", "_a.4":"b"})
loop_a.add_row({"_a.3":"c", "_a.4":"d"}, default_value=".")
assert list(cif_block["_a.1"]) == ['1', '3', '5', '?', '.']
assert list(cif_block["_a.2"]) == ['2', '4', '6', '?', '.']
assert list(cif_block["_a.3"]) == ['?', '?', '?', 'a', 'c']
assert list(cif_block["_a.4"]) == ['.', '.', '.', 'b', 'd']
loop_B = model.loop(header=("_B.1", "_B.2", "_B.3"), data=(1,2,3,4,5,6))
cif_block.add_loop(loop_B)
assert cif_block.get_loop("_B") is loop_B
assert cif_block.get_loop_or_row("_B") is loop_B
assert cif_block.get_loop("_b") is loop_B
assert cif_block.get_loop_or_row("_b") is loop_B
#
cif_block = model.block()
cif_block['_a'] = """\
123
456"""
s = StringIO()
cif_block.show(out=s)
s.seek(0)
assert not show_diff("\n".join([l.strip() for l in s.readlines()]), """\
_a
;
123
456
;
""")
cm = iotbx.cif.reader(input_string="""\
data_a
_test_row.id 1
_test_row.data2 2
_test_row.data3 3
_test_row.data4 44
#
loop_
_test_row_range.sheet_id
_test_row_range.id
_test_row_range.beg_label_comp_id
_test_row_range.beg_label_asym_id
A 1 SER A
A 2 MET A
#
""").model()
#
cif_block = list(cm.values())[0]
loop_or_row = cif_block.get_loop_or_row('_test_row')
assert loop_or_row.n_rows() == 1
assert loop_or_row.n_columns() == 4
assert list(loop_or_row['_test_row.id']) == ['1']
assert list(loop_or_row['_test_row.data2']) == ['2']
assert list(loop_or_row['_test_row.data3']) == ['3']
assert list(loop_or_row['_test_row.data4']) == ['44']
for r in loop_or_row.iterrows():
assert list(r['_test_row.id']) == ['1']
assert list(r['_test_row.data2']) == ['2']
assert list(r['_test_row.data3']) == ['3']
assert list(r['_test_row.data4']) == ['4','4']
def exercise_cif_model():
import iotbx.cif
from iotbx.cif import model
loop = model.loop()
loop["_loop_a"] = flex.double((1, 2, 3))
loop.add_columns({'_loop_c': [4, 5, 6], '_loop_b': ['7', '8', '9']})
loop.add_row((4, 7, '0'))
try:
loop["_loop_invalid"] = (7, 8)
except AssertionError:
pass
else:
raise Exception_expected
assert len(loop) == 3 # the number of columns (keys)
assert loop.size() == 4 # the number of rows (loop iterations)
assert loop.keys() == ['_loop_a', '_loop_c', '_loop_b']
try:
loop["no_leading_underscore"] = 3
except Sorry:
pass
else:
raise Exception_expected
loop2 = model.loop(header=("_loop2_a", "_loop2_b"),
data=(1, 2, 3, 4, 5, 6))
assert loop2.keys() == ["_loop2_a", "_loop2_b"]
assert loop2.values() == [
flex.std_string(['1', '3', '5']),
flex.std_string(['2', '4', '6'])
]
assert list(loop2.iterrows()) == [{
'_loop2_a': '1',
'_loop2_b': '2'
}, {
'_loop2_a': '3',
'_loop2_b': '4'
}, {
'_loop2_a': '5',
'_loop2_b': '6'
}]
#
block = model.block()
block["_tag"] = 3
block["_tag1"] = "'a string'"
block["_another_tag"] = 3.142
assert "_tag" in block
assert "_tag1" in block
assert "_another_tag" in block
assert block["_tag"] == '3'
assert block["_tag1"] == "'a string'"
assert block["_another_tag"] == "3.142"
assert block.keys() == ['_tag', '_tag1', '_another_tag']
assert block.values() == ["3", "'a string'", "3.142"]
try:
block["no_leading_underscore"] = 3
except Sorry:
pass
else:
raise Exception_expected
block.add_loop(loop)
assert len(block) == 6
assert block.items() == [('_tag', '3'), ('_tag1', "'a string'"),
('_another_tag', '3.142'),
('_loop_a', flex.std_string(['1', '2', '3',
'4'])),
('_loop_c', flex.std_string(['4', '5', '6',
'7'])),
('_loop_b', flex.std_string(['7', '8', '9',
'0']))]
block['_loop_c'] = [11, 12, 13, 14]
assert '_loop_c' in block.loops['_loop'].keys()
assert list(block['_loop_c']) == ['11', '12', '13', '14']
#
block1 = model.block()
block1["_tag"] = 2
block1["_tag2"] = 1.2
loop3 = model.loop(header=("_loop_a", "_loop_b"), data=(6, 5, 4, 3, 2, 1))
block1.add_loop(loop2)
block1.add_loop(loop3)
block.update(block1)
assert block._items.keys() == ['_another_tag', '_tag2', '_tag', '_tag1']
assert block._items.values() == ['3.142', '1.2', '2', "'a string'"]
assert block.loops.keys() == ['_loop', '_loop2']
assert block.keys() == [
'_tag', '_tag1', '_another_tag', '_loop_a', '_loop_b', '_tag2',
'_loop2_a', '_loop2_b'
]
assert list(block['_loop_a']) == ['6', '4', '2']
assert list(block['_loop_b']) == ['5', '3', '1']
assert list(block['_loop2_a']) == ['1', '3', '5']
assert list(block['_loop2_b']) == ['2', '4', '6']
try:
block['_loop_c']
except KeyError:
pass
else:
raise Exception_expected
bad_loop = model.loop(header=("_a", "_b"), data=(1, 2, 3, 4, 5, 6))
block1.add_loop(bad_loop)
assert "_a" in block1
assert "_b" in block1
assert list(block.get_looped_item("_loop_a")) == ['6', '4', '2']
try:
block.get_looped_item("_tag", value_error=ValueError)
except ValueError:
pass
else:
raise Exception_expected
assert list(block.get_looped_item("_tag", value_error=None)) == ['2']
try:
block.get_looped_item("_none_existent")
except KeyError:
pass
else:
raise Exception_expected
assert block.get_looped_item("_none_existent",
key_error=None,
default="my_default") == "my_default"
assert block.get_single_item("_tag") == "2"
try:
block.get_single_item("_loop_a")
except ValueError:
pass
else:
raise Exception_expected
assert block.get_single_item("_loop_a",
value_error=None,
default="default") == "default"
try:
block.get_single_item("_none_existent")
except KeyError:
pass
else:
raise Exception_expected
assert block.get_single_item("_none_existent", key_error=None) is None
#
cif_model = model.cif()
cif_model["fred"] = block
assert "fred" in cif_model
assert cif_model["frEd"] is block
assert cif_model["fred"]["_Tag"] == '2'
cif_model["fred"]["_tag"] = 4
assert cif_model["fred"]["_tag"] == '4'
del cif_model["fred"]["_tAg"]
try:
cif_model["fred"]["_tag"]
except KeyError:
pass
else:
raise Exception_expected
cm = cif_model.deepcopy()
l = cm["fred"]["_loop"]
del cm["Fred"]["_loop_B"]
assert not cm["fred"].has_key("_loop_b")
assert not l.has_key("_loop_b")
assert cm["fred"].loops.has_key("_loop")
del cm["fred"]["_loop_a"]
assert not cm["fred"].loops.has_key("_loop")
del cm["fred"]["_loop2"]
assert not cm["fred"].loops.has_key("_loop2")
s = StringIO()
print >> s, cm
assert not show_diff(
s.getvalue(), """\
data_fred
_tag1 'a string'
_another_tag 3.142
_tag2 1.2
""")
#
cm2 = cif_model.copy()
cm3 = cif_model.deepcopy()
assert cm2['fred']['_loop_a'] is cif_model['fred']['_loop_a']
assert cm3['fred']['_loop_a'] is not cif_model['fred']['_loop_a']
b2 = copy.copy(block)
b3 = copy.deepcopy(block)
assert b2['_loop_b'] is block['_loop_b']
assert b3['_loop_b'] is not block['_loop_b']
l2 = loop.copy()
l3 = loop.deepcopy()
assert l2['_loop_b'] is loop['_loop_b']
assert l3['_loop_b'] is not loop['_loop_b']
#
s = StringIO()
cif_model.show(out=s)
assert not show_diff(
s.getvalue(), """\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
s = StringIO()
cif_model.show(out=s, indent=" ", data_name_field_width=0)
assert not show_diff(
s.getvalue(), """\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
s = StringIO()
cif_model.show(out=s, indent="", indent_row=" ", data_name_field_width=0)
assert not show_diff(
s.getvalue(), """\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
cif_model.sort(recursive=True)
s = StringIO()
cif_model.show(out=s)
assert not show_diff(
s.getvalue(), """\
data_fred
_another_tag 3.142
_tag1 'a string'
_tag2 1.2
loop_
_loop_a
_loop_b
6 5
4 3
2 1
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
save = model.save()
save.add_loop(l3)
save['_tag1'] = 3
block = model.block()
block['bob'] = save
cm = model.cif({'fred': block})
s = StringIO()
cm.show(out=s)
assert not show_diff(
s.getvalue(), """data_fred
save_bob
loop_
_loop_a
_loop_c
_loop_b
1 11 7
2 12 8
3 13 9
4 14 0
_tag1 3
save_
""")
b1 = model.block()
b1['_a'] = 1
b1['_b'] = 2
b1['_c'] = 3
b2 = model.block()
b2['_a'] = 2
b2['_c'] = 3
b2['_d'] = 4
b3 = b1.difference(b2)
b4 = b2.difference(b1)
assert b3.items() == [('_b', '2'), ('_a', '2')]
assert b4.items() == [('_d', '4'), ('_a', '1')]
l = model.loop(data=dict(_loop_d=(1, 2), _loop_e=(3, 4), _loop_f=(5, 6)))
assert l == l
assert l == l.deepcopy()
assert l != l2
assert l != l3
l2 = model.loop(
data=dict(_loop_d=(1, 2, 3), _loop_e=(3, 4, 5), _loop_f=(5, 6, 7)))
b1.add_loop(l)
b2.add_loop(l2)
b5 = b1.difference(b2)
assert b5['_loop'] == l2
l = model.loop(data=OrderedDict((('_loop_a', (1, 21, -13)),
('_loop_b', (-221.3, 3.01, 4.246)),
('_loop_c', ("a", "b", "cc")))))
b = model.block()
b.add_loop(l)
cm = model.cif({'fred': b})
s = StringIO()
cm.show(out=s, loop_format_strings={'_loop': '% 4i% 8.2f %s'})
assert not show_diff(
s.getvalue(), """\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.30 a
21 3.01 b
-13 4.25 cc
""")
s = StringIO()
cm.show(out=s)
assert not show_diff(
s.getvalue(), """\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
21 3.01 b
-13 4.246 cc
""")
l.add_row((".", "?", "."))
s = StringIO()
cm.show(out=s)
assert not show_diff(
s.getvalue(), """\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
21 3.01 b
-13 4.246 cc
. ? .
""")
l.delete_row(index=1)
s = StringIO()
cm.show(out=s)
assert not show_diff(
s.getvalue(), """\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
-13 4.246 cc
. ? .
""")
l2 = l.deepcopy()
l2.delete_row(index=0)
l2.delete_row(index=0)
l2.delete_row(index=0)
try:
l2.show(out=s)
except AssertionError, e:
pass
"_a_1": ('string with spaces', 'nospaces'),
"_a_2": ('a', 'b')
})
s = StringIO()
loop.show(out=s, align_columns=True)
assert not show_diff(
s.getvalue(), """\
loop_
_a_1
_a_2
'string with spaces' a
nospaces b
""")
#
cb = model.block()
cm = model.cif()
cm["a"] = cb
cb["_b"] = ""
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(), """\
data_a
_b ''
""")
#
loop = model.loop(
data=OrderedDict((("_entity_poly.entity_id", ('1', '2', '3')),
("_entity_poly.pdbx_seq_one_letter_code", (
"TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR",
"""\
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
def exercise_cif_model():
import iotbx.cif
from iotbx.cif import model
loop = model.loop()
loop["_loop_a"] = flex.double((1,2,3))
loop.add_columns({'_loop_c': [4,5,6],
'_loop_b': ['7','8','9']})
loop.add_row((4,7,'0'))
try: loop["_loop_invalid"] = (7,8)
except AssertionError: pass
else: raise Exception_expected
assert len(loop) == 3 # the number of columns (keys)
assert loop.size() == 4 # the number of rows (loop iterations)
assert loop.keys() == ['_loop_a', '_loop_c', '_loop_b']
try: loop["no_leading_underscore"] = 3
except Sorry: pass
else: raise Exception_expected
loop2 = model.loop(header=("_loop2_a", "_loop2_b"), data=(1,2,3,4,5,6))
assert loop2.keys() == ["_loop2_a", "_loop2_b"]
assert loop2.values() == [flex.std_string(['1', '3', '5']),
flex.std_string(['2', '4', '6'])]
assert list(loop2.iterrows()) == [
{'_loop2_a': '1', '_loop2_b': '2'},
{'_loop2_a': '3', '_loop2_b': '4'},
{'_loop2_a': '5', '_loop2_b': '6'}]
#
block = model.block()
block["_tag"] = 3
block["_tag1"] = "'a string'"
block["_another_tag"] = 3.142
assert "_tag" in block
assert "_tag1" in block
assert "_another_tag" in block
assert block["_tag"] == '3'
assert block["_tag1"] == "'a string'"
assert block["_another_tag"] == "3.142"
assert block.keys() == ['_tag', '_tag1', '_another_tag']
assert block.values() == ["3", "'a string'", "3.142"]
try: block["no_leading_underscore"] = 3
except Sorry: pass
else: raise Exception_expected
block.add_loop(loop)
assert len(block) == 6
assert block.items() == [
('_tag', '3'), ('_tag1', "'a string'"), ('_another_tag', '3.142'),
('_loop_a', flex.std_string(['1', '2', '3', '4'])),
('_loop_c', flex.std_string(['4', '5', '6', '7'])),
('_loop_b', flex.std_string(['7', '8', '9', '0']))]
block['_loop_c'] = [11, 12, 13, 14]
assert '_loop_c' in block.loops['_loop'].keys()
assert list(block['_loop_c']) == ['11', '12', '13', '14']
#
block1 = model.block()
block1["_tag"] = 2
block1["_tag2"] = 1.2
loop3 = model.loop(header=("_loop_a", "_loop_b"), data=(6,5,4,3,2,1))
block1.add_loop(loop2)
block1.add_loop(loop3)
block.update(block1)
assert block._items.keys() == ['_another_tag', '_tag2', '_tag', '_tag1']
assert block._items.values() == ['3.142', '1.2', '2', "'a string'"]
assert block.loops.keys() == ['_loop', '_loop2']
assert block.keys() == ['_tag', '_tag1', '_another_tag', '_loop_a',
'_loop_b','_tag2', '_loop2_a', '_loop2_b']
assert list(block['_loop_a']) == ['6', '4', '2']
assert list(block['_loop_b']) == ['5', '3', '1']
assert list(block['_loop2_a']) == ['1', '3', '5']
assert list(block['_loop2_b']) == ['2', '4', '6']
try: block['_loop_c']
except KeyError: pass
else: raise Exception_expected
bad_loop = model.loop(header=("_a", "_b"), data=(1,2,3,4,5,6))
block1.add_loop(bad_loop)
assert "_a" in block1
assert "_b" in block1
assert list(block.get_looped_item("_loop_a")) == ['6', '4', '2']
try: block.get_looped_item("_tag", value_error=ValueError)
except ValueError: pass
else: raise Exception_expected
assert list(block.get_looped_item("_tag", value_error=None)) == ['2']
try: block.get_looped_item("_none_existent")
except KeyError: pass
else: raise Exception_expected
assert block.get_looped_item(
"_none_existent", key_error=None, default="my_default") == "my_default"
assert block.get_single_item("_tag") == "2"
try: block.get_single_item("_loop_a")
except ValueError: pass
else: raise Exception_expected
assert block.get_single_item(
"_loop_a", value_error=None, default="default") == "default"
try: block.get_single_item("_none_existent")
except KeyError: pass
else: raise Exception_expected
assert block.get_single_item("_none_existent", key_error=None) is None
#
cif_model = model.cif()
cif_model["fred"] = block
assert "fred" in cif_model
assert cif_model["frEd"] is block
assert cif_model["fred"]["_Tag"] == '2'
cif_model["fred"]["_tag"] = 4
assert cif_model["fred"]["_tag"] == '4'
del cif_model["fred"]["_tAg"]
try: cif_model["fred"]["_tag"]
except KeyError: pass
else: raise Exception_expected
cm = cif_model.deepcopy()
l = cm["fred"]["_loop"]
del cm["Fred"]["_loop_B"]
assert not cm["fred"].has_key("_loop_b")
assert not l.has_key("_loop_b")
assert cm["fred"].loops.has_key("_loop")
del cm["fred"]["_loop_a"]
assert not cm["fred"].loops.has_key("_loop")
del cm["fred"]["_loop2"]
assert not cm["fred"].loops.has_key("_loop2")
s = StringIO()
print >> s, cm
assert not show_diff(s.getvalue(),
"""\
data_fred
_tag1 'a string'
_another_tag 3.142
_tag2 1.2
""")
#
cm2 = cif_model.copy()
cm3 = cif_model.deepcopy()
assert cm2['fred']['_loop_a'] is cif_model ['fred']['_loop_a']
assert cm3['fred']['_loop_a'] is not cif_model ['fred']['_loop_a']
b2 = copy.copy(block)
b3 = copy.deepcopy(block)
assert b2['_loop_b'] is block['_loop_b']
assert b3['_loop_b'] is not block['_loop_b']
l2 = loop.copy()
l3 = loop.deepcopy()
assert l2['_loop_b'] is loop['_loop_b']
assert l3['_loop_b'] is not loop['_loop_b']
#
s = StringIO()
cif_model.show(out=s)
assert not show_diff(s.getvalue(),
"""\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
s = StringIO()
cif_model.show(out=s, indent=" ", data_name_field_width=0)
assert not show_diff(s.getvalue(),
"""\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
s = StringIO()
cif_model.show(out=s, indent="", indent_row=" ", data_name_field_width=0)
assert not show_diff(s.getvalue(),
"""\
data_fred
_tag1 'a string'
_another_tag 3.142
loop_
_loop_a
_loop_b
6 5
4 3
2 1
_tag2 1.2
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
cif_model.sort(recursive=True)
s = StringIO()
cif_model.show(out=s)
assert not show_diff(s.getvalue(),
"""\
data_fred
_another_tag 3.142
_tag1 'a string'
_tag2 1.2
loop_
_loop_a
_loop_b
6 5
4 3
2 1
loop_
_loop2_a
_loop2_b
1 2
3 4
5 6
""")
save = model.save()
save.add_loop(l3)
save['_tag1'] = 3
block = model.block()
block['bob'] = save
cm = model.cif({'fred': block})
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(),
"""data_fred
save_bob
loop_
_loop_a
_loop_c
_loop_b
1 11 7
2 12 8
3 13 9
4 14 0
_tag1 3
save_
""")
b1 = model.block()
b1['_a'] = 1
b1['_b'] = 2
b1['_c'] = 3
b2 = model.block()
b2['_a'] = 2
b2['_c'] = 3
b2['_d'] = 4
b3 = b1.difference(b2)
b4 = b2.difference(b1)
assert b3.items() == [('_b', '2'), ('_a', '2')]
assert b4.items() == [('_d', '4'), ('_a', '1')]
l = model.loop(data=dict(_loop_d=(1,2),_loop_e=(3,4),_loop_f=(5,6)))
assert l == l
assert l == l.deepcopy()
assert l != l2
assert l != l3
l2 = model.loop(data=dict(_loop_d=(1,2,3),_loop_e=(3,4,5),_loop_f=(5,6,7)))
b1.add_loop(l)
b2.add_loop(l2)
b5 = b1.difference(b2)
assert b5['_loop'] == l2
l = model.loop(data=OrderedDict((('_loop_a',(1,21,-13)),
('_loop_b',(-221.3,3.01,4.246)),
('_loop_c',("a","b","cc")))))
b = model.block()
b.add_loop(l)
cm = model.cif({'fred':b})
s = StringIO()
cm.show(out=s, loop_format_strings={'_loop':'% 4i% 8.2f %s'})
assert not show_diff(s.getvalue(),"""\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.30 a
21 3.01 b
-13 4.25 cc
""")
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(),"""\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
21 3.01 b
-13 4.246 cc
""")
l.add_row((".", "?", "."))
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(),"""\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
21 3.01 b
-13 4.246 cc
. ? .
""")
l.delete_row(index=1)
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(),"""\
data_fred
loop_
_loop_a
_loop_b
_loop_c
1 -221.3 a
-13 4.246 cc
. ? .
""")
l2 = l.deepcopy()
l2.delete_row(index=0)
l2.delete_row(index=0)
l2.delete_row(index=0)
try: l2.show(out=s)
except AssertionError, e: pass
else: raise Exception_expected
l.clear()
try: l.show(out=s)
except AssertionError, e: pass
else: raise Exception_expected
#
loop = model.loop(data={"_a_1": ('string with spaces','nospaces'),
"_a_2": ('a', 'b')})
s = StringIO()
loop.show(out=s, align_columns=True)
assert not show_diff(s.getvalue(), """\
loop_
_a_1
_a_2
'string with spaces' a
nospaces b
""")
#
cb = model.block()
cm = model.cif()
cm["a"] = cb
cb["_b"] = ""
s = StringIO()
cm.show(out=s)
assert not show_diff(s.getvalue(), """\
data_a
_b ''
""")
#
loop = model.loop(data=OrderedDict((
("_entity_poly.entity_id", ('1', '2', '3')),
("_entity_poly.pdbx_seq_one_letter_code", (
"TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR",
"""\
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
THVFRLKKWIQKVIDQFGE""",
"NGDFEEIPEE(TYS)LQ",
)),
("_entity_poly.pdbx_seq_one_letter_code_can", (
"TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR",
"""\
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
THVFRLKKWIQKVIDQFGE""",
"NGDFEEIPEEYLQ",
)),
("_entity_poly.pdbx_strand_id", ('L', 'H', 'I'))
)))
s = StringIO()
loop.show(out=s, align_columns=True)
s.seek(0)
assert not show_diff("\n".join(l.rstrip() for l in s.readlines()),"""\
loop_
_entity_poly.entity_id
_entity_poly.pdbx_seq_one_letter_code
_entity_poly.pdbx_seq_one_letter_code_can
_entity_poly.pdbx_strand_id
1 TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR TFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGR L
2
;
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
THVFRLKKWIQKVIDQFGE
;
;
IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
THVFRLKKWIQKVIDQFGE
;
H
3 NGDFEEIPEE(TYS)LQ NGDFEEIPEEYLQ I\
""")
#
cb = model.block()
cm = model.cif()
cm["a"] = cb
cb["_a"] = '1 "a" 2'
cb["_b"] = "1 'b' 3"
cb["_c"] = "O1'"
cb["_d"] = 'O2"'
cb["_e"] = """1 'a' "b" 3"""
s = StringIO()
print >> s, cm
s.seek(0)
assert not show_diff("\n".join(l.rstrip() for l in s.readlines()), """\
data_a
_a '1 "a" 2'
_b "1 'b' 3"
_c O1'
_d O2"
_e
;
1 'a' "b" 3
;
""")
# verify that what we wrote out above is valid CIF and we can read it back in
cm2 = iotbx.cif.reader(input_string=s.getvalue()).model()
cb2 = cm2["a"]
assert cb2["_a"] == cb["_a"]
assert cb2["_b"] == cb["_b"]
assert cb2["_c"] == cb["_c"]
assert cb2["_d"] == cb["_d"]
assert cb2["_e"].strip() == cb["_e"]
#
cm = iotbx.cif.reader(input_string="""\
data_a
loop_
_pdbx_refine_tls_group.id
_pdbx_refine_tls_group.refine_tls_id
_pdbx_refine_tls_group.selection
_pdbx_refine_tls_group.selection_details
1 1 ? "chain 'A' and (resid 2 through 15 )"
2 2 ? "chain 'A' and (resid 16 through 26 )"
3 3 ? "chain 'A' and (resid 27 through 43 )"
4 4 ? "chain 'B' and (resid 1 through 14 )"
5 5 ? "chain 'B' and (resid 15 through 20 )"
""").model()
print cm
#
cif_block = model.block()
loop_a = model.loop(header=("_a.1", "_a.2"), data=(1,2,3,4,5,6))
cif_block.add_loop(loop_a)
assert cif_block.get_loop("_a") is loop_a
assert cif_block.get_loop("_b") is None
assert cif_block.get_loop("_b", default=loop_a) is loop_a
loop_a = cif_block.get_loop_with_defaults(
"_a", default_dict={"_a.2":".", "_a.3":"?", "_a.4":"."})
assert list(cif_block["_a.1"]) == ['1', '3', '5']
assert list(cif_block["_a.2"]) == ['2', '4', '6']
assert list(cif_block["_a.3"]) == ['?', '?', '?']
assert list(cif_block["_a.4"]) == ['.', '.', '.']
loop_a.add_row({"_a.3":"a", "_a.4":"b"})
loop_a.add_row({"_a.3":"c", "_a.4":"d"}, default_value=".")
assert list(cif_block["_a.1"]) == ['1', '3', '5', '?', '.']
assert list(cif_block["_a.2"]) == ['2', '4', '6', '?', '.']
assert list(cif_block["_a.3"]) == ['?', '?', '?', 'a', 'c']
assert list(cif_block["_a.4"]) == ['.', '.', '.', 'b', 'd']
#
cif_block = model.block()
cif_block['_a'] = """\
123
456"""
s = StringIO()
cif_block.show(out=s)
s.seek(0)
assert not show_diff("\n".join([l.strip() for l in s.readlines()]), """\
_a
;
123
456
;
""")
def __init__(self, cif_object=None):
self._model = cif_object
if self._model is None:
self._model = model.cif()
self._current_block = None
self._current_save = None
def run():
quartz_as_cif = """\
data_quartz
_space_group_name_H-M_alt 'P 62 2 2'
_cell_length_a 5.01
_cell_length_b 5.01
_cell_length_c 5.47
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Si Si 0.500 0.500 0.333 0.200
O O 0.197 -0.197 0.833 0.200
"""
import iotbx.cif
quartz_structure = iotbx.cif.reader(
input_string=quartz_as_cif).build_crystal_structures()["quartz"]
quartz_structure.show_summary().show_scatterers()
print
# Examine the site symmetry of each scatterer
for scatterer in quartz_structure.scatterers():
print "%s:" % scatterer.label, "%8.4f %8.4f %8.4f" % scatterer.site
site_symmetry = quartz_structure.site_symmetry(scatterer.site)
print " point group type:", site_symmetry.point_group_type()
print " special position operator:", site_symmetry.special_op_simplified()
# Let's use scattering factors from the International Tables
quartz_structure.scattering_type_registry(table="it1992")
# Now calculate some structure factors
f_calc = quartz_structure.structure_factors(d_min=2).f_calc()
f_calc_sq = f_calc.as_intensity_array()
f_calc_sq.show_summary().show_array()
# Output the intensities to a CIF file
f_calc_sq.as_cif_simple(
array_type="calc", data_name="quartz", out=open("quartz.hkl", "wb"))
from iotbx.cif import model
# Create an instance of model.cif, equivalent to a full CIF file
cif = model.cif()
# Create an instance of model.block, equivalent to a CIF data block
cif_block = model.block()
# Add the unit cell parameters to the cif_block
unit_cell = quartz_structure.unit_cell()
params = unit_cell.parameters()
cif_block["_cell_length_a"] = params[0]
cif_block["_cell_length_b"] = params[1]
cif_block["_cell_length_c"] = params[2]
cif_block["_cell_angle_alpha"] = params[3]
cif_block["_cell_angle_beta"] = params[4]
cif_block["_cell_angle_gamma"] = params[5]
cif_block["_cell_volume"] = unit_cell.volume()
# now we will create a CIF loop containing the space group symmetry operations
space_group = quartz_structure.space_group()
symop_loop = model.loop(header=("_space_group_symop_id",
"_space_group_symop_operation_xyz"))
for symop_id, symop in enumerate(space_group):
symop_loop.add_row((symop_id + 1, symop.as_xyz()))
# add the symop_loop and space group items to the cif_block
space_group_type = quartz_structure.space_group_info().type()
cif_block["_space_group_crystal_system"] = space_group.crystal_system().lower()
cif_block["_space_group_IT_number"] = space_group_type.number()
cif_block["_space_group_name_H-M_alt"] = space_group_type.lookup_symbol()
cif_block["_space_group_name_Hall"] = space_group_type.hall_symbol()
cif_block.add_loop(symop_loop)
# add cif_block to the cif object with the data block name "quartz"
cif["quartz"] = cif_block
# print the cif object to standard output
print cif
from iotbx.cif import validation
cif_model = iotbx.cif.reader(input_string=quartz_as_cif).model()
cif_model["quartz"]["_diffrn_radiation_probe"] = "xray"
cif_model["quartz"]["_space_group_crystal_system"] = "Monoclinic"
cif_model["quartz"]["_space_group_IT_number"] = "one hundred and eighty"
symop_loop.add_column("_space_group_symop_sg_id", [1]*12)
cif_model["quartz"].add_loop(symop_loop)
cif_core_dic = validation.smart_load_dictionary(name="cif_core.dic")
cif_model.validate(cif_core_dic, show_warnings=True)
