def run_cobra_model(self):
cobra_model = load_json_model(data_dir_tests + '/mini.json')
convert_to_irreversible(cobra_model)
solution = cobra_model.optimize()
assert(solution.objective_value == 30.0)
assert(solution.fluxes['ENO'] == 20.0)
self.cobra_model = cobra_model
def load_json_me(file_name):
"""
Load ME model from json
file_name : str or file-like object
"""
me = load_json_model(file_name)
# Re-convert stoichiometries back to sympy
for rxn in me.reactions:
for met in rxn.metabolites:
s =rxn._metabolites[met]
try:
rxn._metabolites[met] = float(s)
except ValueError:
rxn._metabolites[met] = get_sympy_expression(s)
try:
rxn.lower_bound = float(rxn.lower_bound)
except ValueError:
rxn.lower_bound = get_sympy_expression(rxn.lower_bound)
try:
rxn.upper_bound = float(rxn.upper_bound)
except ValueError:
rxn.upper_bound = get_sympy_expression(rxn.upper_bound)
for met in me.metabolites:
b = met._bound
try:
met._bound = float(b)
except ValueError:
met._bound = get_sympy_expression(b)
return me
def make_Model(self,model_id_I=None,model_id_O=None,date_O=None,model_file_name_I=None,ko_list=[],flux_dict={},description=None):
'''make a new model'''
if model_id_I and model_id_O and date_O: #make a new model based off of a modification of an existing model in the database
cobra_model_sbml = None;
cobra_model_sbml = self.get_row_modelID_dataStage02IsotopomerModels(model_id_I);
# write the model to a temporary file
cobra_model = self.writeAndLoad_modelTable(cobra_model_sbml);
# Constrain the model
self.constrain_modelModelVariables(cobra_model=cobra_model,ko_list=ko_list,flux_dict=flux_dict);
# Change description, if any:
if description:
cobra_model.description = description;
# test the model
if self.test_model(cobra_model):
# write the model to a temporary file
with open('cobra_model_tmp.xml','w') as file:
file.write(cobra_model);
# upload the model to the database
self.import_dataStage02Model_sbml(model_id_O, date_O, 'cobra_model_tmp.xml');
elif model_file_name_I and model_id_O and date_O: #modify an existing model in not in the database
# check for the file type
if '.json' in model_file_name_I:
# Read in the sbml file and define the model conditions
cobra_model = load_json_model(model_file_name_I, print_time=True);
elif '.xml' in model_file_name_I:
# Read in the sbml file and define the model conditions
cobra_model = create_cobra_model_from_sbml_file(model_file_name_I, print_time=True);
else: print('file type not supported')
# Constrain the model
self.constrain_modelModelVariables(cobra_model=cobra_model,ko_list=ko_list,flux_dict=flux_dict);
# Change description, if any:
if description:
cobra_model.description = description;
# test the model
if self.test_model(cobra_model):
# write the model to a temporary file
filename = '';
if '.xml' in model_file_name_I:
filename = 'cobra_model_tmp.xml'
with open(filename,'w') as file:
file.write(cobra_model);
file.close()
elif '.json' in model_file_name_I:
filename = 'cobra_model_tmp.json';
with open(filename,'w') as file:
file.write(cobra_model);
file.close()
else: print('file type not supported')
# upload the model to the database
self.import_dataStage02Model_sbml(model_id_O, date_O, filename);
else:
print('need to specify either an existing model_id or model_file_name!')
def load_model(self,model_file_name_I):
'''load a cobra model from json or sbml
INPUT:
model_file_name_I = name of file
OUTPUT:
cobra_model
'''
cobra_model=None;
# check for the file type
if '.json' in model_file_name_I:
# Read in the sbml file and define the model conditions
cobra_model = load_json_model(model_file_name_I, print_time=True);
elif '.xml' in model_file_name_I:
# Read in the sbml file and define the model conditions
cobra_model = create_cobra_model_from_sbml_file(model_file_name_I, print_time=True);
else:
print('file type not supported');
return cobra_model;
def writeAndLoad_modelTable(self,cobra_model_table_I):
'''Load a cobra model from models table'''
# write the model to a temporary file
if cobra_model_table_I['file_type'] == 'sbml':
with open('cobra_model_tmp.xml','w') as file:
file.write(cobra_model_table_I['model_file']);
file.close()
cobra_model = None;
cobra_model = create_cobra_model_from_sbml_file('cobra_model_tmp.xml', print_time=True);
elif cobra_model_table_I['file_type'] == 'json':
with open('cobra_model_tmp.json','w') as file:
file.write(cobra_model_table_I['model_file']);
file.close()
cobra_model = None;
cobra_model = load_json_model('cobra_model_tmp.json');
else:
print('file_type not supported')
return None;
return cobra_model;
@author: noore
"""
from cobra.io.json import load_json_model
from cobra import Metabolite, Reaction
from stfba.find_energy_generating_cycle import stFBA
from cobra.flux_analysis.loopless import construct_loopless_model
from stfba import settings
model_name_to_obj = {'e_coli_core': 'BIOMASS_Ecoli_core_w_GAM',
'iAF1260': 'BIOMASS_Ec_iAF1260_core_59p81M',
'iJO1366': 'BIOMASS_Ec_iJO1366_core_53p95M'}
model_name = 'e_coli_core'
model = load_json_model('model/%s.json' % model_name)
model.objective = model_name_to_obj[model_name]
model.reactions.EX_glc__D_e.lower_bound = -10
model.reactions.EX_o2_e.lower_bound = 0
model.reactions.EX_o2_e.upper_bound = 0
if model_name == 'iJO1366':
#model.reactions.SPODM.lower_bound = 0
#model.reactions.SPODM.upper_bound = 0
model.reactions.MOX.lower_bound = 0
print("Calculating anaerobic yield with original %s model" % model_name)
fba_sol = model.optimize(solver=settings.LP_SOLVER)
print("FBA max yield: %.3f" % fba_sol.f)
def _parse_model_json(self,model_id_I,date_I,filename_I):
# Read in the sbml file and define the model conditions
cobra_model = load_json_model(filename_I);
model_data = [];
model_data_tmp = {};
# parse out model metadata
model_data_tmp['model_id'] = model_id_I;
model_data_tmp['model_name'] = None;
model_data_tmp['date'] = date_I;
model_data_tmp['model_description'] = cobra_model.description;
with open(filename_I, 'r') as f:
model_data_tmp['model_file'] = f.read();
model_data_tmp['file_type'] = 'json'
model_data.append(model_data_tmp)
reaction_data = [];
# parse out reaction data
for r in cobra_model.reactions:
reaction_data_dict = {};
reaction_data_dict['model_id'] = model_id_I
reaction_data_dict['rxn_id'] = r.id
reaction_data_dict['rxn_name'] = r.name
reaction_data_dict['equation'] = r.build_reaction_string()
reaction_data_dict['subsystem'] = r.subsystem
reaction_data_dict['gpr'] = r.gene_reaction_rule
reaction_data_dict['genes'] = []
genes = r.genes;
for g in genes:
reaction_data_dict['genes'].append(g.id);
reaction_data_dict['reactants_stoichiometry'] = [];
reaction_data_dict['reactants_ids'] = [];
reactants = r.reactants;
for react in reactants:
reaction_data_dict['reactants_stoichiometry'].append(r.get_coefficient(react.id));
reaction_data_dict['reactants_ids'].append(react.id);
reaction_data_dict['products_stoichiometry'] = [];
reaction_data_dict['products_ids'] = [];
products = r.products;
for prod in products:
reaction_data_dict['products_stoichiometry'].append(r.get_coefficient(prod.id));
reaction_data_dict['products_ids'].append(prod.id);
reaction_data_dict['lower_bound'] = r.lower_bound
reaction_data_dict['upper_bound'] = r.upper_bound
reaction_data_dict['objective_coefficient'] = r.objective_coefficient
reaction_data_dict['flux_units'] = 'mmol*gDW-1*hr-1'
reaction_data_dict['reversibility'] = r.reversibility
#reaction_data_dict['reactants_stoichiometry_tracked'] = None;
#reaction_data_dict['products_stoichiometry_tracked'] = None;
#reaction_data_dict['reactants_ids_tracked'] = None;
#reaction_data_dict['products_ids_tracked'] = None;
#reaction_data_dict['reactants_mapping'] = None;
#reaction_data_dict['products_mapping'] = None;
#reaction_data_dict['rxn_equation'] = None;
reaction_data_dict['fixed'] = None;
reaction_data_dict['free'] = None;
reaction_data_dict['weight'] = None;
reaction_data_dict['used_'] = True
reaction_data_dict['comment_'] = None;
reaction_data.append(reaction_data_dict);
metabolite_data = [];
# parse out metabolite data
for met in cobra_model.metabolites:
metabolite_data_tmp = {};
metabolite_data_tmp['model_id'] = model_id_I
metabolite_data_tmp['met_name'] = met.name;
metabolite_data_tmp['met_id'] = met.id;
if met.formula:
if met.formula != 'None' and met.formula.formula != 'None' and not 'X' in met.formula.formula:
try:
tmp = Formula(met.formula.formula);
metabolite_data_tmp['formula'] = tmp.formula;
except Exception as e:
print(e);
print(met.id)
metabolite_data_tmp['formula']= met.formula.formula;
else:
metabolite_data_tmp['formula'] = met.formula.formula;
else:
metabolite_data_tmp['formula'] = None;
metabolite_data_tmp['charge'] = met.charge
metabolite_data_tmp['compartment'] = met.compartment
metabolite_data_tmp['bound'] = met._bound
metabolite_data_tmp['constraint_sense'] = met._constraint_sense
#metabolite_data_tmp['met_elements'] = None;
#metabolite_data_tmp['met_atompositions'] = None;
metabolite_data_tmp['balanced'] = None;
metabolite_data_tmp['fixed'] = None;
#metabolite_data_tmp['met_symmetry'] = None;
#metabolite_data_tmp['met_symmetry_atompositions'] = None;
metabolite_data_tmp['used_'] = True
metabolite_data_tmp['comment_'] = None;
metabolite_data_tmp['lower_bound'] = None;
metabolite_data_tmp['upper_bound'] = None;
metabolite_data.append(metabolite_data_tmp);
return model_data,reaction_data,metabolite_data
def init_model(self):
cobra_model = load_json_model(data_dir_tests + '/mini.json')
convert_to_irreversible(cobra_model)
solution = cobra_model.optimize()
self.cobra_model = cobra_model
