def main():
"""
Main logic to find lowest energy conformation of the functional groups
through an evolutionary.
"""
info("Welcome to confswitch; finding your lowest energy conformers")
info("Using fapswitch version {}".format(fapswitch.__version__))
# Name for a the single structure
job_name = options.get('job_name')
# Load it
input_structure = load_structure(job_name)
# Structure is ready!
# Begin processing
info("Structure attachment sites: "
"{}".format(list(input_structure.attachments)))
info("Structure attachment multiplicities: "
"{}".format(
dict((key, len(val))
for key, val in input_structure.attachments.items())))
# Functional group library is self initialising
info("Groups in library: {}".format(functional_groups.group_list))
# Only use the cif backend here
backends = [CifFileBackend()]
# Optimise each custom string passed to fapswitch
custom_strings = options.get('custom_strings')
site_strings = re.findall(r'\[(.*?)\]', custom_strings)
debug("Site replacement options strings: {}".format(site_strings))
for site_string in site_strings:
# These should be [email protected]_group2@site2
# with optional %angle
site_list = []
manual_angles = []
for site in [x for x in site_string.split('.') if x]:
site_id, functionalisation = site.split('@')
if '%' in functionalisation:
functionalisation, manual = functionalisation.split('%')
else:
manual = None
site_list.append([site_id, functionalisation])
manual_angles.append(manual)
debug(str(site_list))
debug(str(manual_angles))
optimise_conformation(input_structure, site_list, backends=backends)
def log_info(self):
"""Send all the information about the group to the logging functions."""
info("[{}]".format(self.ident))
info("name = {}".format(self.name))
info("smiles = {}".format(self.smiles))
info("mepo_compatible = {}".format(self.mepo_compatible))
debug("atoms =")
for atom in self.atoms:
debug(" {0:4} {1:5} {2[0]:10.6f} {2[1]:10.6f} {2[2]:10.6f}".
format(atom.type, atom.uff_type, atom.pos))
debug("orientation = {0[0]:.1f} {0[1]:.1f} {0[2]:.1f}".format(
self.orientation))
debug("normal = {0[0]:.1f} {0[1]:.1f} {0[2]:.1f}".format(self.normal))
debug("carbon_bond = {}".format(self.bond_length))
debug("bonds =")
for bond in self.bonds:
debug(" {0[0]:4} {0[1]:4} {1[1]:5.2f}".format(
bond, self.bonds[bond]))
info("")
def fapswitch_deamon(structure, backends, rotations=12):
"""
Use sockets to listen and receive structures.
"""
timeout = options.getint('timeout')
# set this to zero for random available port
port = options.getint('port')
listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# no host as this is running locally
listener.bind(('', port))
port = listener.getsockname()[1]
# Ensure that we always know the port
critical("Listening on port {} ...".format(port))
listener.settimeout(timeout)
listener.listen(1)
# We only wait for a little bit so that process doesn't zombie forever
try:
conn, addr = listener.accept()
except socket.timeout:
error("No connection within {} seconds; exiting".format(timeout))
listener.close()
return False
info('Connected by {}'.format(addr))
# Server will continue until an empty input is sent or something times out
conn.settimeout(timeout)
while 1:
try:
line = conn.recv(1024).decode('utf-8')
except socket.timeout:
error(
"Timed out after {} seconds waiting for input".format(timeout))
return False
# Empty input closes server
if not line:
break
# collect information to send what has been done back
processed = []
# freeform strings are in braces {}, no spaces
free_strings = re.findall('{(.*?)}', line)
debug("Freeform strings: {}".format(free_strings))
for free_string in free_strings:
complete = freeform_replace(structure,
custom=free_string,
backends=backends,
rotations=rotations)
processed.append('{{{}}}'.format(free_string))
processed.append('{}'.format(complete))
# site replacements in square brackets [], no spaces
site_strings = re.findall(r'\[(.*?)\]', line)
debug("Site replacement strings: {}".format(site_strings))
for site_string in site_strings:
site_list = []
manual_angles = []
for site in [x for x in site_string.split('.') if x]:
site_id, functionalisation = site.split('@')
if '%' in functionalisation:
functionalisation, manual = functionalisation.split('%')
else:
manual = None
site_list.append([site_id, functionalisation])
manual_angles.append(manual)
debug("{}".format(site_list))
debug("{}".format(manual_angles))
complete = site_replace(structure,
site_list,
backends=backends,
rotations=rotations,
manual_angles=manual_angles)
processed.append('[{}]'.format(site_string))
processed.append('{}'.format(complete))
try:
conn.sendall((':'.join(processed)).encode('utf-8'))
except conn.timeout:
error("Timed out sending status after {} seconds".format(timeout))
return False
conn.close()
return True
def main():
"""
Initialise everything needed to get the daemon running and start it up.
"""
info("Welcome to fapswitchd; the daemon interface to fapswitch")
info("Using fapswitch version {}".format(fapswitch.__version__))
# Name for a the single structure
job_name = options.get('job_name')
# Load it
input_structure = load_structure(job_name)
# Structure is ready!
# Begin processing
info("Structure attachment sites: "
"{}".format(list(input_structure.attachments)))
info("Structure attachment multiplicities :"
"{}".format(
dict((key, len(val))
for key, val in input_structure.attachments.items())))
# Functional group library is self initialising
info("Groups in library: {}".format(functional_groups.group_list))
#Define some backends for where to send the structures
backends = []
backend_options = options.gettuple('backends')
rotations = options.getint('rotations')
info("Will rotate each group a maximum of {} times.".format(rotations))
if 'sqlite' in backend_options:
# Initialise and add the database writer
debug("Initialising the sqlite backend")
try:
from fapswitch.backend.sql import AlchemyBackend
backend = AlchemyBackend(job_name)
backend.populate_groups(functional_groups)
backends.append(backend)
except ImportError:
error("SQLAlchemy not installed; sql backend unavailable")
# done
if 'file' in backend_options:
# Just dumps to a named file
debug("Initialising cif file writer backend")
from fapswitch.backend.cif_file import CifFileBackend
backends.append(CifFileBackend())
# Make the program die if the daemon is called unsuccessfully
if fapswitch_deamon(input_structure,
backends=backends,
rotations=rotations):
info("Daemon completed successfully")
else:
error("Daemon did not complete successfully; check output")
def make_collision_tester(test_method='vdw', test_scale=1.122462048309373):
"""
Create a function that will test atom overlap based on separation
and atomic radii.
"""
# OH NO MY CAPSLOCK GOT STUCK!
test_method = test_method.lower()
if test_method == 'cvdw':
if _SCIPY_WEAVE == False or sys.platform in ['win32']:
warning("No scipy.weave, cvdw not available, falling back to vdw")
test_method = 'vdw'
if test_method == 'cvdw':
info('CVdW radii collision test, scale factor: %f' % test_scale)
half_scale = test_scale*0.5
def collision(test_atom, atoms, cell, ignore=()):
"""Covalent radii collision test."""
pos = test_atom.ipos(cell.cell, cell.inverse)
ipos = test_atom.ifpos(cell.inverse)
for idx, atom in enumerate(atoms):
# Skip non atoms
if atom is None or idx in ignore:
continue
dist = wdist(pos, ipos, atom.ipos(cell.cell, cell.inverse),
atom.ifpos(cell.inverse), cell.cell)
min_dist = half_scale*(test_atom.vdw_radius + atom.vdw_radius)
if dist < min_dist:
return False
return True
elif test_method == 'vdw':
info('VdW radii collision test, scale factor: %f' % test_scale)
half_scale = test_scale*0.5
def collision(test_atom, atoms, cell, ignore=()):
"""Covalent radii collision test."""
pos = test_atom.ipos(cell.cell, cell.inverse)
ipos = test_atom.ifpos(cell.inverse)
for idx, atom in enumerate(atoms):
# Skip non atoms
if atom is None or idx in ignore:
continue
dist = min_vect(pos, ipos, atom.ipos(cell.cell, cell.inverse),
atom.ifpos(cell.inverse), cell.cell)
dist = (dot(dist, dist))**0.5
min_dist = half_scale*(test_atom.vdw_radius + atom.vdw_radius)
if dist < min_dist:
return False
return True
elif test_method == 'covalent':
info('Covalent radii collision test, scale factor: %f' % test_scale)
def collision(test_atom, atoms, cell, ignore=()):
"""Covalent radii collision test."""
# TODO(tdaff): Can't use cleaner .fractional tests as the structure
# is not passed around to make _parent; can this be fixed
pos = test_atom.ipos(cell.cell, cell.inverse)
ipos = test_atom.ifpos(cell.inverse)
for idx, atom in enumerate(atoms):
# Skip non atoms
if atom is None or idx in ignore:
continue
dist = min_vect(pos, ipos, atom.ipos(cell.cell, cell.inverse),
atom.ifpos(cell.inverse), cell.cell)
dist = (dot(dist, dist))**0.5
min_dist = test_scale*(test_atom.covalent_radius +
atom.covalent_radius)
if dist < min_dist:
return False
return True
elif test_method == 'none':
info('Collision detection turned off')
def collision(*args, **kwargs):
"""Dummy method always reports no collision"""
return True
else:
info('Collison test with absolute distance: %f' % test_scale)
def collision(test_atom, atoms, cell, ignore=()):
"""Covalent radii collision test."""
pos = test_atom.ipos(cell.cell, cell.inverse)
ipos = test_atom.ifpos(cell.inverse)
for idx, atom in enumerate(atoms):
# Skip non atoms
if atom is None or idx in ignore:
continue
dist = min_vect(pos, ipos, atom.ipos(cell.cell, cell.inverse),
atom.ifpos(cell.inverse), cell.cell)
dist = (dot(dist, dist))**0.5
if dist < test_scale:
return False
return True
# Make a closure for the tester function
return collision
initial_directory = os.getcwd()
os.chdir(datastore)
available_structures = OrderedDict()
available_structure_files = sorted(glob.glob('*.cif'))
# Pulling out sites only works with well formatted cifs with site label
# as the first item on the line and ' H ' within the line for attachment
# sites.
# Since you are running the web component, you should know what
# you're doing...
for available_structure in available_structure_files:
sname = available_structure[:-4]
available_structures[sname] = []
for line in open(available_structure):
if ' H ' in line:
available_structures[sname].append(line.split()[0])
# Populate this later
initialised_structures = OrderedDict()
# Functional group library is self initialising
info("Groups in library: %s" % str(functional_groups.group_list))
#start tornado
application.listen(TORNADO_PORT)
info("Starting server on port number {}...".format(TORNADO_PORT))
info("Open at http://127.0.0.1:{}/index.html".format(TORNADO_PORT))
tornado.ioloop.IOLoop.instance().start()
def optimise_conformation(structure, site_list, backends):
"""
Optimise the conformation using a genetic algorithm
"""
# Set up the files and their names!
known_name = path.join(os.getcwd(), '{}-known.json'.format(structure.name))
output_name = path.join(os.getcwd(), '{}-opt.csv'.format(structure.name))
opt_path = path.join(os.getcwd(), 'opt_{}'.format(structure.name))
output_file = open(output_name, 'w')
output_file.write('#generation,most_fit,average\n')
# Use a library if one exists
if os.path.exists(known_name):
known_individuals = json.load(open(known_name))
info("Existing library found")
else:
known_individuals = {}
# Run in a subdirectory
try:
os.mkdir(opt_path)
except OSError:
pass
os.chdir(opt_path)
elitism = 3
max_pop = 30
mate_pop = 15
mutation_rate = 0.1
max_generations = 30
population = []
generation = 1
fill_with_randoms(population, max_pop, structure, site_list, backends)
while True:
for individual in population:
info("Fitness of {}".format(individual['gene']))
if individual['gene'] in known_individuals:
known_individual = known_individuals[individual['gene']]
individual['fitness'] = known_individual['fitness']
else:
individual['fitness'] = measure_fitness(
structure, site_list, individual)
info("From faps {}".format(individual['fitness']))
known_individuals[individual['gene']] = individual
population.sort()
most_fit = population[0]
average_fit = sum(x['fitness'] for x in population) / len(population)
info("Most fit {}: {}".format(most_fit['gene'], most_fit['fitness']))
info("Generation average: {}".format(average_fit))
output_file.write("{},{},{}\n".format(generation, most_fit['fitness'],
average_fit))
output_file.flush()
if generation > max_generations:
break
else:
new_population = population[0:elitism]
mate_genes(population, new_population, mate_pop, structure,
site_list, backends, mutation_rate)
fill_with_randoms(new_population, max_pop, structure, site_list,
backends)
population = new_population
generation += 1
if not generation % 5:
json.dump(known_individuals, open(known_name, 'w'))
os.chdir('..')
def main():
"""
Simple application that will read options and run the substitution
for an input structure.
"""
info("Welcome to cliswitch; the command line interface to fapswitch")
info("Using fapswitch version {}".format(fapswitch.__version__))
# Name for a the single structure
job_name = options.get('job_name')
# Load it
input_structure = load_structure(job_name)
# Structure is ready!
# Begin processing
info("Structure attachment sites: "
"{}".format(list(input_structure.attachments)))
info("Structure attachment multiplicities: "
"{}".format(dict((key, len(val)) for key, val in
input_structure.attachments.items())))
# Will use selected sites if specified, otherwise use all
replace_only = options.gettuple('replace_only')
if replace_only == ():
replace_only = None
# Functional group library is self initialising
info("Groups in library: {}".format(functional_groups.group_list))
#Define some backends for where to send the structures
backends = []
backend_options = options.gettuple('backends')
if 'sqlite' in backend_options:
# Initialise and add the database writer
debug("Initialising the sqlite backend")
try:
from fapswitch.backend.sql import AlchemyBackend
backend = AlchemyBackend(job_name)
backend.populate_groups(functional_groups)
backends.append(backend)
except ImportError:
error("SQLAlchemy not installed; sql backend unavailable")
# done
if 'file' in backend_options:
# Just dumps to a named file
debug("Initialising cif file writer backend")
from fapswitch.backend.cif_file import CifFileBackend
backends.append(CifFileBackend())
##
# User defined, single-shot functionalisations
##
rotations = options.getint('rotations')
info("Will rotate each group a maximum of {} times.".format(rotations))
custom_strings = options.get('custom_strings')
# Pattern matching same as in the daemon
# freeform strings are in braces {}, no spaces
freeform_strings = re.findall('{(.*?)}', custom_strings)
debug("Freeform option strings: {}".format(freeform_strings))
for freeform_string in freeform_strings:
freeform_replace(input_structure, custom=freeform_string,
backends=backends, rotations=rotations)
# site replacements in square brackets [], no spaces
site_strings = re.findall(r'\[(.*?)\]', custom_strings)
debug("Site replacement options strings: {}".format(site_strings))
for site_string in site_strings:
# These should be [email protected]_group2@site2
# with optional %angle
site_list = []
manual_angles = []
for site in [x for x in site_string.split('.') if x]:
site_id, functionalisation = site.split('@')
if '%' in functionalisation:
functionalisation, manual = functionalisation.split('%')
else:
manual = None
site_list.append([site_id, functionalisation])
manual_angles.append(manual)
debug(str(site_list))
debug(str(manual_angles))
site_replace(input_structure, site_list, backends=backends,
rotations=rotations, manual_angles=manual_angles)
##
# Full systematic replacement of everything start here
##
# Only use these functional groups for replacements
replace_groups = options.gettuple('replace_groups')
if replace_groups == ():
replace_groups = None
max_different = options.getint('max_different')
prob_unfunc = options.getfloat('unfunctionalised_probability')
# Do absolutely every combination (might take a while)
if options.getbool('replace_all_sites'):
all_combinations_replace(input_structure,
replace_only=replace_only,
groups_only=replace_groups,
max_different=max_different,
backends=backends,
rotations=rotations)
# group@site randomisations
random_count = options.getint('site_random_count')
successful_randoms = 0
while successful_randoms < random_count:
#function returns true if structure is generated
if random_combination_replace(input_structure,
replace_only=replace_only,
groups_only=replace_groups,
max_different=max_different,
prob_unfunc=prob_unfunc,
backends=backends,
rotations=rotations):
successful_randoms += 1
info("Generated %i of %i site random structures" %
(successful_randoms, random_count))
# fully freeform randomisations
random_count = options.getint('full_random_count')
successful_randoms = 0
while successful_randoms < random_count:
#function returns true if structure is generated
if freeform_replace(input_structure,
replace_only=replace_only,
groups_only=replace_groups,
max_different=max_different,
prob_unfunc=prob_unfunc,
backends=backends,
rotations=rotations):
successful_randoms += 1
info("Generated %i of %i fully random structures" %
(successful_randoms, random_count))
def freeform_replace(structure,
replace_only=None,
groups_only=None,
num_groups=None,
custom=None,
rotations=36,
max_different=0,
prob_unfunc=0.5,
backends=()):
"""
Replace sites with no symmetry constraint and with random rotations
for successive insertion trials (i.e. there will be variation for the
same structure)
"""
# Assume that the replace only is passed as a list or iterable
# default to everything
if replace_only is None:
replace_only = list(structure.attachments)
# Valid list is True where allowed to attach
valid_list = []
for attachment, points in structure.attachments.items():
if attachment in replace_only:
valid_list.extend([True] * len(points))
else:
valid_list.extend([False] * len(points))
debug("Attachment mask %s" % valid_list)
nsites = sum(valid_list)
if groups_only is not None:
local_groups = [x for x in functional_groups if x in groups_only]
debug("Using only: %s" % local_groups)
else:
local_groups = list(functional_groups)
debug("Using all groups: %s" % local_groups)
if len(local_groups) > max_different > 0:
local_groups = random.sample(local_groups, max_different)
debug("Restricted to: %s" % local_groups)
if custom is not None:
# Specific functionalisation requested
debug("Processing custom string: %s" % custom)
func_repr = custom.strip('{}').split(".")
if len(func_repr) > nsites:
error("Expected %s sites; got %s" % (nsites, len(func_repr)))
func_repr = func_repr[:nsites]
warning("Truncated to {%s}" % ".".join(func_repr))
elif len(func_repr) < nsites:
error("Expected %s sites; got %s" % (nsites, len(func_repr)))
func_repr = func_repr + [''] * (nsites - len(func_repr))
warning("Padded to {%s}" % ".".join(func_repr))
for unmasked, site in zip(valid_list, func_repr):
if unmasked is False and site != '':
warning("Replacing masked site")
else:
# Randomise the selection
if num_groups is None:
num_groups = random.randint(1, nsites)
debug("Randomly replacing %i sites" % num_groups)
elif num_groups > nsites:
warning("Too many sites requested; changing all %i" % nsites)
num_groups = nsites
func_repr = [random.choice(local_groups) for _ in range(num_groups)]
# Pad to the correct length
func_repr.extend([""] * (nsites - num_groups))
# Randomise
random.shuffle(func_repr)
# These need to be put in the unmasked slots
masked_func_repr = []
for unmasked in valid_list:
if unmasked:
masked_func_repr.append(func_repr.pop(0))
else:
masked_func_repr.append('')
func_repr = masked_func_repr
# Unique-ish
unique_name = hashlib.md5(str(func_repr).encode('utf-8')).hexdigest()
new_mof_name = []
new_mof = list(structure.atoms)
new_mof_bonds = dict(structure.bonds)
rotation_count = 0
for this_point, this_group in zip(
chain(*[
structure.attachments[x] for x in sorted(structure.attachments)
]), func_repr):
if this_group == "":
new_mof_name.append("")
continue
else:
new_mof_name.append(this_group)
attachment = functional_groups[this_group]
attach_id = this_point[0]
attach_to = this_point[1]
attach_at = structure.atoms[attach_to].pos
attach_towards = this_point[2]
attach_normal = structure.atoms[attach_to].normal
#extracted_atoms = new_mof[attach_id:attach_id+1]
new_mof[attach_id:attach_id + 1] = [None]
start_idx = len(new_mof)
for trial_rotation in range(rotations):
incoming_group, incoming_bonds = (attachment.atoms_attached_to(
attach_at, attach_towards, attach_normal, attach_to,
start_idx))
for atom in incoming_group:
if not test_collision(
atom, new_mof, structure.cell, ignore=[attach_to]):
rotation_count += 1
attach_normal = dot(
rotation_about_angle(attach_towards,
random.random() * np.pi * 2),
attach_normal)
break
else:
# Fits, so add and move on
new_mof.extend(incoming_group)
new_mof_bonds.update(incoming_bonds)
break
else:
# this_point not valid
warning("Failed to generate: %s" %
".".join([x or "" for x in func_repr]))
warning("Stopped after: %s" % ".".join(new_mof_name))
debug("Needed {} rotations".format(rotation_count))
return False
new_mof_name = ".".join(new_mof_name)
# Counts how many have been made
identifier = count()
info("Generated (%i): {%s}" % (identifier, new_mof_name))
info("With unique name: %s" % unique_name)
full_mof_name = "%s_free_%s" % (structure.name, new_mof_name)
ligands = atoms_to_identifiers(new_mof, new_mof_bonds)
cif_file = atoms_to_cif(new_mof,
structure.cell,
new_mof_bonds,
full_mof_name,
identifiers=ligands)
if ligands is not None:
ligand_strings = [
"{}:{}".format(ligand.smiles, ligand.sa_score)
for ligand in ligands
]
info("Ligands (%i): %s" % (identifier, ", ".join(ligand_strings)))
for backend in backends:
backend.add_freeform_structure(structure.name,
func_repr,
cif_file,
ligands=ligands)
# completed sucessfully
return True
def site_replace(structure,
replace_list,
rotations=12,
backends=(),
manual_angles=None):
"""
Use replace list to modify the structure with (group, site) pairs.
Will dump a cif to the backends on success, and return 1 for failed attempt.
"""
rotation_angle = 2 * np.pi / rotations
new_mof_name = []
new_mof_friendly_name = []
# copy the atoms and bonds so we don't alter the original structure
new_mof = list(structure.atoms)
new_mof_bonds = dict(structure.bonds)
rotation_count = 0
# here we can zip things up
if manual_angles is None:
manual_angles = [None for _ in replace_list]
elif len(manual_angles) != len(replace_list):
error("All angles must be specified in manual mode")
for this_replace, this_manual in zip(replace_list, manual_angles):
# Unpack the two values from replace list, allows us to zip with
# manual angles
this_group, this_site = this_replace
attachment = functional_groups[this_group]
# pre-calculate all the angles that we will use to zip with the
# group positions, always generate a list of list of angles
if this_manual is None or this_manual == '+':
# generates all the possible angle sets with the same angle on
# everything
angles = [
trial_rotation * rotation_angle
for trial_rotation in range(rotations)
]
# regenerate the '+' if it is used, otherwise blank it
angles_str = "" if not this_manual else '+'
elif len(this_manual) == 1:
# Assume single angle applies to all groups, just make one set
angles = [2 * np.pi * (ord(this_manual[0]) - 97) / 26.0]
angles_str = "%%%s" % this_manual
debug("{:.1f} rotation for all".format(180 * angles[0] / np.pi))
elif '+' in this_manual:
# keep manual angles fixed and scan all angles where it is '+'
angles = []
for trial_rotation in range(rotations):
this_angle = []
for x in this_manual:
if x == '+':
this_angle.append(trial_rotation * rotation_angle)
else:
this_angle.append(2 * np.pi * (ord(x) - 97) / 26.0)
angles.append(this_angle)
angles_str = "%%%s" % this_manual
debug("Angles from: {}".format(
[round(180 * x / np.pi, 1) for x in angles[0]]))
debug("Angles to: {}".format(
[round(180 * x / np.pi, 1) for x in angles[-1]]))
else:
# a = 0 degrees, z = 346
# _ is negative (or anything else negative...)
angles = [[2 * np.pi * (ord(x) - 97) / 26.0 for x in this_manual]]
angles_str = "%%%s" % this_manual
debug("Angles: {}".format(
[round(180 * x / np.pi, 1) for x in angles[0]]))
new_mof_name.append("%s@%s%s" % (this_group, this_site, angles_str))
new_mof_friendly_name.append("%s@%s%s" %
(attachment.name, this_site, angles_str))
current_mof = list(new_mof)
current_mof_bonds = dict(new_mof_bonds)
for this_angle in angles:
# for single angles, make a list to zip with each site
if isinstance(this_angle, float):
this_angle = [this_angle] * len(
structure.attachments[this_site])
if len(this_angle) < len(structure.attachments[this_site]):
error("Not enough manual angles : {} needed, {} found".format(
len(structure.attachments[this_site]), len(this_angle)))
return False
for this_point, this_rotation in zip(
structure.attachments[this_site], this_angle):
if this_rotation < 0:
# manually specified empty site
continue
attach_id = this_point[0]
attach_to = this_point[1]
attach_at = structure.atoms[attach_to].pos
attach_towards = this_point[2]
attach_normal = structure.atoms[attach_to].normal
new_mof[attach_id:attach_id + 1] = [None]
start_idx = len(new_mof)
attach_normal = dot(
rotation_about_angle(attach_towards, this_rotation),
attach_normal)
incoming_group, incoming_bonds = attachment.atoms_attached_to(
attach_at, attach_towards, attach_normal, attach_to,
start_idx)
group_fits = True
for atom in incoming_group:
if not test_collision(
atom, new_mof, structure.cell, ignore=[attach_to]):
group_fits = False
break
else:
# Fits, so add and move on
new_mof.extend(incoming_group)
new_mof_bonds.update(incoming_bonds)
if not group_fits:
# kill this loop
rotation_count += 1
new_mof = list(current_mof)
new_mof_bonds = dict(current_mof_bonds)
break
else:
# All sites attached without collision,
# break out of the rotations loop
break
else:
# Did not attach after all rotations
fail_name = ".".join(["@".join(x) for x in replace_list])
warning("Failed: %s@%s from %s" %
(this_group, this_site, fail_name))
debug("Needed {} rotations".format(rotation_count))
return False
debug("Needed {} rotations".format(rotation_count))
new_mof_name = ".".join(new_mof_name)
new_mof_friendly_name = ".".join(new_mof_friendly_name)
# Counts how many have been made
identifier = count()
info("Generated (%i): [%s]" % (identifier, new_mof_friendly_name))
full_mof_name = "%s_func_%s" % (structure.name, new_mof_name)
ligands = atoms_to_identifiers(new_mof, new_mof_bonds)
cif_file = atoms_to_cif(new_mof,
structure.cell,
new_mof_bonds,
full_mof_name,
identifiers=ligands)
if ligands is not None:
ligand_strings = [
"{}:{}".format(ligand.smiles, ligand.sa_score)
for ligand in ligands
]
info("Ligands (%i): %s" % (identifier, ", ".join(ligand_strings)))
for backend in backends:
backend.add_symmetry_structure(structure.name,
replace_list,
cif_file,
ligands=ligands,
manual_angles=manual_angles)
# successful
return True
def load_structure(name):
"""
Load a structure from a pickle or generate a new one as required.
Returns an initialised structure. Caches loaded structure on disk.
"""
info("Structure version {}.{}".format(*DOT_FAPSWITCH_VERSION))
pickle_file = "__{}.fapswitch".format(name)
loaded = False
if path.exists(pickle_file):
info("Existing structure found: {}; loading...".format(pickle_file))
#TODO(tdaff): deal with errors
try:
with open(pickle_file, 'rb') as p_structure:
structure = pickle.load(p_structure)
# Negative versions ensure that very old caches will be removed
if not hasattr(structure, 'fapswitch_version'):
structure.fapswitch_version = (-1, -1)
# Need to make sure it is still valid
if structure.fapswitch_version[0] < DOT_FAPSWITCH_VERSION[0]:
error("Old dot-fapswitch detected, re-initialising")
loaded = False
elif structure.fapswitch_version[1] < DOT_FAPSWITCH_VERSION[1]:
warning(
"Cached file {} may be out of date".format(pickle_file))
loaded = True
else:
debug("Finished loading")
loaded = True
except EOFError:
warning("Corrupt pickle; re-initialising")
loaded = False
if not loaded:
info("Initialising a new structure. This may take some time.")
structure = Structure(name)
structure.from_cif('{}.cif'.format(name))
# Ensure that atoms in the structure are properly typed
structure.gen_factional_positions()
bonding_src = options.get('connectivity')
if bonding_src == 'file':
# Rudimentary checks for poor structures
if not hasattr(structure, 'bonds'):
error("No bonding in input structure, will probably fail")
elif len(structure.bonds) == 0:
error("Zero bonds found, will fail")
elif not hasattr(structure.atoms[0], 'uff_type'):
warning("Atoms not properly typed, expect errors")
else:
info("Bonding from input file used")
elif bonding_src == 'bondsonly':
info("Generating atom types from cif bonding")
structure.gen_types_from_bonds()
elif bonding_src == 'openbabel':
info("Generating topology with Open Babel")
structure.gen_babel_uff_properties()
# A couple of structure checks
structure.check_close_contacts()
structure.bond_length_check()
# Initialise the sites after bonds are perceived
structure.gen_attachment_sites()
structure.gen_normals()
# Cache the results
info("Dumping cache of structure to {}".format(pickle_file))
structure.fapswitch_version = DOT_FAPSWITCH_VERSION
with open(pickle_file, 'wb') as p_structure:
pickle.dump(structure, p_structure, protocol=-1)
return structure
