def read_prm(cls, filename):
""" Reads a CPLEX PRM file.
Reads a CPLEX parameters file and returns a DOcplex parameter group
instance. This parameter object can be used in a solve().
Args:
filename: a path string
Returns:
A `RootParameterGroup object`, if the read operation succeeds, else None.
"""
# TODO: Clean up - now creating an adapter raise importError if CPLEX not found
# if not Cplex: # pragma: no cover
# raise RuntimeError("ModelReader.read_prm() requires CPLEX runtime.")
with _CplexReaderFileContext(filename,
read_method=["parameters",
"read_file"]) as adapter:
cpx = adapter.cpx
if cpx:
# raw parameters
params = get_params_from_cplex_version(cpx.get_version())
for param in params:
try:
cpx_value = cpx._env.parameters._get(param.cpx_id)
if cpx_value != param.default_value:
param.set(cpx_value)
except adapter.CplexError: # pragma: no cover
pass
return params
else: # pragma: no cover
return None
def init_cplex_parameters(self):
# we need a local import here so that docplex.mp.environment
# does not depend on context
from docplex.mp.environment import Environment
local_env = self.get('_env_at_init') or Environment.get_default_env()
cplex_version = local_env.cplex_version
local_env.check_cplex_version()
cplex_parameters = get_params_from_cplex_version(cplex_version)
return cplex_parameters
def init_cplex_parameters(self):
local_env = self.get('_env_at_init') or Environment.get_default_env()
cplex_version = local_env.cplex_version
cplex_parameters = get_params_from_cplex_version(cplex_version)
return cplex_parameters
