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################################################################################
#
# Copyright (c) 2009 The MadGraph5_aMC@NLO Development team and Contributors
#
# This file is a part of the MadGraph5_aMC@NLO project, an application which
# automatically generates Feynman diagrams and matrix elements for arbitrary
# high-energy processes in the Standard Model and beyond.
#
# It is subject to the MadGraph5_aMC@NLO license which should accompany this
# distribution.
#
# For more information, visit madgraph.phys.ucl.ac.be and amcatnlo.web.cern.ch
#
################################################################################
"""All models for MG5, in particular UFO models (by FeynRules)"""
import os
import sys
import madgraph.various.misc as misc
def load_model(name, decay=False):
# avoid final '/' in the path
if name.endswith('/'):
name = name[:-1]
path_split = name.split(os.sep)
if len(path_split) == 1:
try:
model_pos = 'models.%s' % name
__import__(model_pos)
return sys.modules[model_pos]
except Exception:
pass
for p in os.environ['PYTHONPATH']:
new_name = os.path.join(p, name)
try:
return load_model(new_name, decay)
except Exception:
pass
elif path_split[-1] in sys.modules:
model_path = os.path.realpath(os.sep.join(path_split))
sys_path = os.path.realpath(os.path.dirname(sys.modules[path_split[-1]].__file__))
if sys_path != model_path:
raise Exception, 'name %s already consider as a python library cann\'t be reassigned(%s!=%s)' % \
(path_split[-1], model_path, sys_path)
with misc.TMP_variable(sys, 'path', [os.sep.join(path_split[:-1])]):
__import__(path_split[-1])
output = sys.modules[path_split[-1]]
if decay:
dec_name = '%s.decays' % path_split[-1]
try:
__import__(dec_name)
except ImportError:
pass
else:
output.all_decays = sys.modules[dec_name].all_decays
return sys.modules[path_split[-1]]
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