def read_cobrapy_config(self):
''' Try to read data from cobrapy-config.txt into appdata'''
config_parser = configparser.RawConfigParser()
try:
config_parser.read(self.appdata.cobrapy_conf_path)
try:
cobra.Configuration().solver = config_parser.get('cobrapy-config', 'solver')
except Exception as e:
print("Cannot set solver from cobrapy-config.txt file because:", e,
"\nReverting solver to COBRApy base setting.")
try:
cobra.Configuration().processes = int(config_parser.get('cobrapy-config', 'processes'))
except Exception as e:
print("Cannot set number of processes from cobrapy-config.txt file because:", e,
"\nReverting number of processes to COBRApy base setting.")
try:
val = float(config_parser.get('cobrapy-config', 'tolerance'))
if 1e-9 <= val <= 0.1:
cobra.Configuration().tolerance = val
else:
raise ValueError
except Exception as e:
print(e, "\nCannot set tolerance from cobrapy-config.txt file because it must be a vaule between 1e-9 and 0.1, reverting to COBRApy base setting.")
except Exception as e:
print('Could not read', self.appdata.cobrapy_conf_path, 'because:', e)
def model_snapshot(model):
"""Run memote on the given model and create a snapshot report."""
configuration = cobra.Configuration()
configuration.processes = 1
_, result = memote.test_model(
model,
results=True,
pytest_args=["-vv", "--tb", "long"],
solver_timeout=20,
skip=("test_inconsistent_min_stoichiometry", ),
)
config = memote.ReportConfiguration.load()
report = memote.SnapshotReport(result=result, configuration=config)
return model, report
def apply(self):
cobra.Configuration().solver = self.default_solver.currentText()
cobra.Configuration().processes = int(self.num_processes.text())
try:
val = float(self.default_tolerance.text())
if 1e-9 <= val <= 0.1:
cobra.Configuration().tolerance = val
else:
raise ValueError
except:
QMessageBox.critical(self, "Cannot set default tolerance", "Choose a value between 0.1 and 1e-9 as default tolerance.")
return
try:
self.appdata.project.cobra_py_model.solver = self.current_solver.currentText()
self.appdata.project.cobra_py_model.tolerance = float(self.current_tolerance.text())
except Exception as e:
QMessageBox.critical(self, "Cannot set current solver/tolerance", str(e))
return
parser = configparser.ConfigParser()
parser.add_section('cobrapy-config')
parser.set('cobrapy-config', 'solver', interface_to_str(cobra.Configuration().solver))
parser.set('cobrapy-config', 'processes', str(cobra.Configuration().processes))
parser.set('cobrapy-config', 'tolerance', str(cobra.Configuration().tolerance))
try:
fp = open(self.appdata.cobrapy_conf_path, "w")
except FileNotFoundError:
os.makedirs(appdirs.user_config_dir(
"cnapy", roaming=True, appauthor=False))
fp = open(self.appdata.cobrapy_conf_path, "w")
parser.write(fp)
fp.close()
self.accept()
def __init__(self, appdata: CnaData):
QDialog.__init__(self)
self.setWindowTitle("Configure COBRApy")
self.appdata = appdata
self.layout = QVBoxLayout()
# allow MILP solvers only?
avail_solvers = list(set(solvers.keys()) - {'scipy'}) # SCIPY currently not even usable for FBA
h2 = QHBoxLayout()
label = QLabel("Default solver:\n(set when loading a model)")
h2.addWidget(label)
self.default_solver = QComboBox()
self.default_solver.addItems(avail_solvers)
self.default_solver.setCurrentIndex(avail_solvers.index(interface_to_str(cobra.Configuration().solver)))
h2.addWidget(self.default_solver)
self.layout.addItem(h2)
h9 = QHBoxLayout()
label = QLabel("Solver for current model:")
h9.addWidget(label)
self.current_solver = QComboBox()
self.current_solver.addItems(avail_solvers)
self.current_solver.setCurrentIndex(avail_solvers.index(interface_to_str(appdata.project.cobra_py_model.problem)))
h9.addWidget(self.current_solver)
self.layout.addItem(h9)
h7 = QHBoxLayout()
label = QLabel(
"Number of processes for multiprocessing (e.g. FVA):")
h7.addWidget(label)
self.num_processes = QLineEdit()
self.num_processes.setFixedWidth(100)
self.num_processes.setText(str(cobra.Configuration().processes))
validator = QIntValidator(1, cpu_count(), self)
self.num_processes.setValidator(validator)
h7.addWidget(self.num_processes)
self.layout.addItem(h7)
h8 = QHBoxLayout()
label = QLabel(
"Default tolerance:\n(set when loading a model)")
h8.addWidget(label)
self.default_tolerance = QLineEdit()
self.default_tolerance.setFixedWidth(100)
self.default_tolerance.setText(str(cobra.Configuration().tolerance))
validator = QDoubleValidator(self)
validator.setBottom(1e-9) # probably a reasonable consensus value
self.default_tolerance.setValidator(validator)
h8.addWidget(self.default_tolerance)
self.layout.addItem(h8)
h10 = QHBoxLayout()
label = QLabel(
"Tolerance for current model:")
h10.addWidget(label)
self.current_tolerance = QLineEdit()
self.current_tolerance.setFixedWidth(100)
self.current_tolerance.setText(str(self.appdata.project.cobra_py_model.tolerance))
validator = QDoubleValidator(self)
validator.setBottom(0)
self.current_tolerance.setValidator(validator)
h10.addWidget(self.current_tolerance)
self.layout.addItem(h10)
l2 = QHBoxLayout()
self.button = QPushButton("Apply Changes")
self.cancel = QPushButton("Close")
l2.addWidget(self.button)
l2.addWidget(self.cancel)
self.layout.addItem(l2)
self.setLayout(self.layout)
self.cancel.clicked.connect(self.reject)
self.button.clicked.connect(self.apply)
import pickle
import cobra
from cobra.test import create_test_model
from optlang import glpk_interface
from cameo import load_model
config = cobra.Configuration()
config.solver = "glpk"
ijo = load_model('iJO1366.xml', glpk_interface)
with open('iJO1366.pickle', 'wb') as out:
pickle.dump(ijo, out, protocol=2)
salmonella = create_test_model('salmonella')
with open('salmonella.pickle', 'wb') as out:
pickle.dump(salmonella, out, protocol=2)
from __future__ import absolute_import
from collections import namedtuple
from os import unlink
from os.path import join, split
from pickle import load
from tempfile import gettempdir
import pytest
import cobra
from cobra import Model
from cobra.io import read_sbml_model, validate_sbml_model, write_sbml_model
config = cobra.Configuration() # for default bounds
try:
import jsonschema
except ImportError:
jsonschema = None
# ----------------------------------
# Definition of SBML files to test
# ----------------------------------
IOTrial = namedtuple('IOTrial', [
'name', 'reference_file', 'test_file', 'read_function', 'write_function',
'validation_function'
])
trials = [
IOTrial('fbc2', 'mini.pickle', 'mini_fbc2.xml', read_sbml_model,
def CreateModel(FBAmodel_path, target_bofs, species, params):
"""
Load FBA models and define the medium in which these cells were grown.
"""
# Load models
models = list()
for k in range(0, len(species)):
print "Loading model..."
models.append(
cobra.io.read_sbml_model(FBAmodel_path + species[k] + '.xml'))
if 'Thaps' in species[k]:
models[k].id = 'Thalassiosira pseudonana CCMP 1335'
print models[k].id, "loaded."
print 'Configuring model...'
cobra_config = cobra.Configuration()
cobra_config.lower_bound = -10000. * params['conversion_factor']
cobra_config.upper_bound = 10000. * params['conversion_factor']
cobra_config.solver = 'glpk'
cobra_config.tolerance = params['error_tol']
print '...done!'
if 'Thalassiosira' in models[k].id:
if 'High light' in models[k].reactions.PHOA410_h.name:
D1 = 1.36247E-08 * params['I'] + 4.94719E-06
elif 'Medium light' in models[k].reactions.PHOA410_h.name:
D1 = 1.16783E-08 * params['I'] + 4.24045E-06
elif 'Low light' in models[k].reactions.PHOA410_h.name:
D1 = 6.4751E-09 * params['I'] + 2.35114E-06
else:
D1 = 5.23188E-09 * params['I'] + 1.89972E-06
models[
k].reactions.PSII_u.reaction = '2.0 h2o_u + {1} h_h + 4.0 p680_exc_u + {2} pq_u + {0} ps2d1_u --> 4.0 h_u + o2_u + 4.0 p680_u + {2} pqh2_u + {0} ps2d1_exc_u'.format(
str(D1), str((2 - D1) * 2), str(2 - D1))
models[k].reactions.PSII_u.upper_bound = 10000.
bof_data = target_bofs[k]['ME'].to_dict()
mgchla = bof_data['cholphya_h'] * 1e-9
gDW = sum([
val for bm, val in bof_data.items() if bm.startswith('biomass')
]) * 1e-12
models[k].reactions.ATPM_c.upper_bound = params['Ic'] * params[
'abs_coeff'] * 60 * 60 * (
mgchla / gDW) * 1e-6 * params['phi_m'] * 12. * (3. /
14) * 1e3
models[k].reactions.CEF_h.upper_bound = params['CEF_ub']
models[k].remove_reactions(['DM_eps_c'])
GAM = Reaction('GAM')
models[k].add_reactions([GAM])
models[k].reactions.GAM.build_reaction_from_string(
'GAM_const_c + {0} atp_c + {0} h2o_c --> {0} adp_c + {0} pi_c + {0} h_c'
.format(str(params['GAM_val'] * params['conversion_factor'])))
obj_rxn = models[k].reactions.query('bof')[0]
gam_met = models[k].metabolites.GAM_const_c
obj_rxn.add_metabolites({gam_met: 1})
reactions_to_convert = models[k].reactions.query('biomass')
[
reactions_to_convert.remove(r)
for r in models[k].reactions.query('DM_biomass')
]
for r in reactions_to_convert:
tmp_dict = dict()
r.lower_bound = r.lower_bound * params['conversion_factor']
r.upper_bound = r.upper_bound * params['conversion_factor']
for m, s in r.metabolites.iteritems():
stoich = s * -1
tmp_dict[m] = stoich
r.add_metabolites({m: stoich})
for bm_met, bm_s in tmp_dict.iteritems():
if not bm_met.id.startswith('biomass'):
r.add_metabolites(
{bm_met: -1 * bm_s * params['conversion_factor']})
else:
r.add_metabolites({bm_met: -1 * bm_s})
BuildBiomassReactions(models[k], params, bof_data)
# Mobilize biomass
mets = [
'polyp_c', 'chitin_c', 'chryso_c', 'gly_c', 'atp_c', 'utp_c',
'gtp_c', 'ctp_c', 'cholphya_h'
]
for m in mets:
rxn = Reaction('sink_' + m)
models[k].add_reactions([rxn])
models[k].reactions.get_by_id(
'sink_' + m).build_reaction_from_string(m + ' <=> ')
for m in bof_data.keys():
if m.endswith('trna_c'):
rxn = Reaction('sink_' + m)
models[k].add_reactions([rxn])
if m == 'glytrna_c':
models[k].reactions.get_by_id(
'sink_' + m).build_reaction_from_string(
m.replace('trna', '') + ' <=> ')
else:
models[k].reactions.get_by_id(
'sink_' + m).build_reaction_from_string(
m.replace('trna', '__L') + ' <=> ')
if m.startswith('tag') or '__L_' in m:
rxn = Reaction('sink_' + m)
models[k].add_reactions([rxn])
models[k].reactions.get_by_id(
'sink_' + m).build_reaction_from_string(m + ' <=> ')
DM_cholphya_h = Reaction('DM_cholphya_h')
models[k].add_reactions([DM_cholphya_h])
models[k].reactions.DM_cholphya_h.build_reaction_from_string(
'cholphya_h --> ')
# Add preliminary constraints
for r in models[k].reactions:
if r.id == 'EX_cncbl3_e' or r.id.startswith('EX_photon'):
models[k].reactions.get_by_id(r.id).lower_bound = 0.
models[k].reactions.get_by_id(r.id).upper_bound = 0.
elif r.id.startswith('EX_'):
models[k].reactions.get_by_id(r.id).lower_bound = 0.
models[k].reactions.get_by_id(
r.id
).upper_bound = 10000. * params['conversion_factor']
elif r.id.startswith('sink_'):
if r.id == 'sink_Asn_X_Ser_Thr_c':
models[k].reactions.get_by_id(
r.id
).lower_bound = -10000. * params['conversion_factor']
models[k].reactions.get_by_id(
r.id
).upper_bound = 10000. * params['conversion_factor']
else:
models[k].reactions.get_by_id(r.id).lower_bound = 0.
models[k].reactions.get_by_id(r.id).upper_bound = 0.
elif r.id.startswith('DM_'):
models[k].reactions.get_by_id(r.id).lower_bound = 0.
models[k].reactions.get_by_id(
r.id
).upper_bound = 10000. * params['conversion_factor']
else:
models[k].reactions.get_by_id(
r.id
).upper_bound = r.upper_bound * params['conversion_factor']
models[k].reactions.get_by_id(
r.id
).lower_bound = r.lower_bound * params['conversion_factor']
return models
def Solve(model, params, t, dark_h, mgchla, gDW):
"""
Add model-specific constraints and objectives and solve
"""
if 'Thalassiosira' in model.id:
with model:
aslice = 1. / params['slices']
PR1 = model.problem.Constraint(
model.reactions.RUBISO_h.flux_expression -
0.025 * model.reactions.RUBISC_h.flux_expression,
lb=-10000. * params['conversion_factor'] * aslice,
ub=0.,
name='photoresp_ub')
PR2 = model.problem.Constraint(
model.reactions.RUBISO_h.flux_expression -
0.001 * model.reactions.RUBISC_h.flux_expression,
lb=0.,
ub=10000. * params['conversion_factor'] * aslice,
name='photoresp_lb')
PQub = calculatePQ(model.metabolites.biomass_c, 'NO3')
PQlb = calculatePQ(model.metabolites.biomass_c, 'NH4')
Q1 = model.problem.Constraint(
model.reactions.EX_o2_e.flux_expression + params['f'] * PQlb *
(model.reactions.EX_hco3_e.flux_expression +
model.reactions.EX_co2_e.flux_expression),
lb=0.,
ub=10000. * params['conversion_factor'] * aslice)
Q2 = model.problem.Constraint(
model.reactions.EX_o2_e.flux_expression + params['f'] * PQub *
(model.reactions.EX_hco3_e.flux_expression +
model.reactions.EX_co2_e.flux_expression),
lb=-10000. * params['conversion_factor'] * aslice,
ub=0.)
resp_day = model.problem.Constraint(
(model.reactions.PSII_u.flux_expression -
model.reactions.EX_o2_e.flux_expression) -
(model.reactions.RUBISO_h.flux_expression +
model.reactions.PTOX_h.flux_expression +
model.reactions.MEHLER_h.flux_expression +
model.reactions.GOX_m.flux_expression +
model.reactions.GOX_x.flux_expression +
model.reactions.AOX_m.flux_expression +
model.reactions.CYOO_m.flux_expression),
lb=0.,
ub=0.)
resp_night = model.problem.Constraint(
model.reactions.EX_o2_e.flux_expression +
(model.reactions.RUBISO_h.flux_expression +
model.reactions.PTOX_h.flux_expression +
model.reactions.MEHLER_h.flux_expression +
model.reactions.GOX_m.flux_expression +
model.reactions.GOX_x.flux_expression +
model.reactions.AOX_m.flux_expression +
model.reactions.CYOO_m.flux_expression),
lb=0.,
ub=0.)
if t not in dark_h:
if model.reactions.DM_biomass_c.objective_coefficient == 1:
model.add_cons_vars([PR1, PR2, resp_day, Q1, Q2])
print 'Photosynthetic Quotient (Q):', PQlb, '-', PQub
else:
model.add_cons_vars([PR1, PR2, resp_day])
else:
model.add_cons_vars([resp_night])
if model.reactions.ATPM_c.objective_coefficient != 1.:
model.reactions.DM_biomass_c.upper_bound = 10000. * params[
'conversion_factor'] * aslice
else:
model.reactions.DM_biomass_c.upper_bound = 0.
model.reactions.H2Ot_m.lower_bound = 0.
model.reactions.ITPA_c.upper_bound = 0.
try:
pfba = cobra.flux_analysis.parsimonious.pfba(
model, fraction_of_optimum=1.)
# pfba = model.optimize()
fluxes = pfba.fluxes
status = pfba.status
print status, pfba.objective_value
except Infeasible:
try:
cobra_config = cobra.Configuration()
cobra_config.tolerance = params['error_tol'] * 10.
pfba = cobra.flux_analysis.parsimonious.pfba(
model, fraction_of_optimum=1.)
fluxes = pfba.fluxes
status = pfba.status
print status, pfba.objective_value
except Infeasible:
if params['verbose'] == 1:
print 'Infeasible'
fluxes = pd.Series(data=[0.] * len(model.reactions),
index=[r.id for r in model.reactions])
status = 'infeasible'
if params['verbose'] == 1:
for r in fluxes.index:
if r.startswith('EX_') and abs(
fluxes.loc[r]) >= params['error_tol']:
print r, fluxes.loc[r]
if fluxes.loc[r] == model.reactions.get_by_id(
r
).lower_bound and not r.startswith('EX_photon'):
print r, 'is limiting'
elif r.startswith('sink_') and abs(
fluxes.loc[r]) > params['error_tol']:
print r, fluxes.loc[r]
if fluxes.loc[r] == model.reactions.get_by_id(
r).lower_bound:
print r, 'is limiting'
elif r.startswith('DM_') and abs(
fluxes.loc[r]) >= params['error_tol']:
print(r, fluxes.loc[r])
return fluxes, status
###
if __name__ == '__main__':
printt('WELCOME')
###
### 0. user defined variables
###
flux_weights_file = '/home/hpce17/hpce17000/projects/hpc/data/expression/formatted_flux_change_results_file.csv'
model_file = '/home/hpce17/hpce17000/projects/hpc/data/Recon3DModel_301.mat'
threads = 48
cobra_config = cobra.Configuration()
cobra_config.processes = threads
print(cobra.Configuration())
###
### 1. read information
###
printt('read information')
### 1.1. read boundary weights
printt('read boundary expression weights')
weights = pandas.read_csv(flux_weights_file, index_col=0)
print(weights.shape)
print(weights.head())
