def solve(self,
n_threads: int,
n_individuals: int,
topol=topology.unconnected()) -> SortedList:
solutions = SortedListWithKey(key=Solution.get_cost)
try:
iteration = 1
solution = self._generate_solution(self._start_problem,
n_individuals, n_threads, topol)
solutions.add(solution)
self._logger.info("({}) - New solution found.".format(iteration))
problem, do_iteration = self._iterate(self._probl_factory,
solution)
while do_iteration:
solution = self._generate_solution(problem, n_individuals,
n_threads, topol)
solutions.add(solution)
iteration += 1
self._logger.info(
"({}) - New solution found.".format(iteration))
problem, do_iteration = self._iterate(self._probl_factory,
solution)
self._logger.info("Differential evolution completed.")
# FIXME - is horrible to have to catch all possible exceptions but
# requires a bit of time to understand all the possible exceptions
# that can be thrown.
except:
self._logger.exception("Exception occurred during solution...")
self._logger.error("Returning solutions found so far")
return solutions
def _generic_archi_ctor(self, *args, **kwargs):
"""
Unnamed arguments (optional):
#. algorithm
#. problem
#. number of islands
#. number individual in the population
Keyword arguments:
* *topology* -- migration topology (defaults to unconnected)
* *distribution_type* -- distribution_type (defaults to distribution_type.point_to_point)
* *migration_direction* -- migration_direction (defaults to migration_direction.destination)
"""
from PyGMO import topology, algorithm, problem
if not ((len(args) == 4) or (len(args) == 0)):
raise ValueError(
"Unnamed arguments list, when present, must be of length 4, but %d elements were found instead"
% (len(args), ))
#Append everything in the same list of constructor arguments
ctor_args = []
for i in args:
ctor_args.append(i)
ctor_args.append(kwargs.pop(
'topology', topology.unconnected())) #unconnected is default
ctor_args.append(
kwargs.pop(
'distribution_type',
distribution_type.point_to_point)) #point-to-point is default
ctor_args.append(
kwargs.pop('migration_direction',
migration_direction.destination)) #destination is default
#Constructs an empty archipelago with no islands using the C++ constructor
self.__original_init__(*ctor_args[-3:])
#We now push back the correct island type if required
if (len(args)) == 4:
if not isinstance(args[0], algorithm._base):
raise TypeError("The first unnamed argument must be an algorithm")
if not isinstance(args[1], problem._base):
raise TypeError("The second unnamed argument must be a problem")
if not isinstance(args[2], int):
raise TypeError(
"The third unnamed argument must be an integer (i.e. number of islands)"
)
if not isinstance(args[3], int):
raise TypeError(
"The fourth unnamed argument must be an integer (i.e. population size)"
)
for n in range(args[2]):
self.push_back(island(args[0], args[1], args[3]))
def _generic_archi_ctor(self,*args,**kwargs):
"""
Unnamed arguments (optional):
#. algorithm
#. problem
#. number of islands
#. number individual in the population
Keyword arguments:
* *topology* -- migration topology (defaults to unconnected)
* *distribution_type* -- distribution_type (defaults to distribution_type.point_to_point)
* *migration_direction* -- migration_direction (defaults to migration_direction.destination)
"""
from PyGMO import topology, algorithm,problem
if not((len(args)==4) or (len(args)==0)):
raise ValueError("Unnamed arguments list, when present, must be of length 4, but %d elements were found instead" % (len(args),))
#Append everything in the same list of constructor arguments
ctor_args = []
for i in args:
ctor_args.append(i)
ctor_args.append(kwargs.pop('topology', topology.unconnected())) #unconnected is default
ctor_args.append(kwargs.pop('distribution_type', distribution_type.point_to_point)) #point-to-point is default
ctor_args.append(kwargs.pop('migration_direction', migration_direction.destination)) #destination is default
#Constructs an empty archipelago with no islands using the C++ constructor
self.__original_init__(*ctor_args[-3:])
#We now push back the correct island type if required
if (len(args))==4:
if not isinstance(args[0],algorithm._base):
raise TypeError("The first unnamed argument must be an algorithm")
if not isinstance(args[1],problem._base):
raise TypeError("The second unnamed argument must be a problem")
if not isinstance(args[2],int):
raise TypeError("The third unnamed argument must be an integer (i.e. number of islands)")
if not isinstance(args[3],int):
raise TypeError("The fourth unnamed argument must be an integer (i.e. population size)")
for n in range(args[2]):
self.push_back(island(args[0],args[1],args[3]))
def _generic_archi_ctor(self, *args, **kwargs):
"""
Unnamed arguments (optional):
#. algorithm
#. problem
#. number of islands
#. number individual in the population
Keyword arguments:
* *topology* -- migration topology (defaults to unconnected)
* *distribution_type* -- distribution_type (defaults to distribution_type.point_to_point)
* *migration_direction* -- migration_direction (defaults to migration_direction.destination)
"""
from PyGMO import topology, algorithm, problem
from difflib import get_close_matches
if not((len(args) == 4) or (len(args) == 0)):
raise ValueError(
"Unnamed arguments list, when present, must be of length 4, but %d elements were found instead" %
(len(args),))
# Append everything in the same list of constructor arguments
ctor_args = []
for i in args:
ctor_args.append(i)
# Pop all known keywords out of kwargs and add a default value if not
# provided
# unconnected is default
ctor_args.append(kwargs.pop('topology', topology.unconnected()))
# point-to-point is default
ctor_args.append(
kwargs.pop('distribution_type', distribution_type.point_to_point))
# destination is default
ctor_args.append(
kwargs.pop('migration_direction', migration_direction.destination))
# Check for unknown keywords
kwlist = ['topology', 'distribution_type', 'migration_direction']
if kwargs:
s = "The following unknown keyworded argument was passed to the construtor: "
for kw in kwargs:
s += kw
spam = get_close_matches(kw, kwlist)
if spam:
s += " (Did you mean %s?), " % spam[0]
else:
s += ", "
raise ValueError(s[:-2])
# Constructs an empty archipelago with no islands using the C++ constructor
self.__original_init__(*ctor_args[-3:])
# We now push back the correct island type if required
if (len(args)) == 4:
if not isinstance(args[0], algorithm._base):
raise TypeError("The first unnamed argument must be an algorithm")
if not (isinstance(args[1], problem._base) or isinstance(args[1], problem._base_stochastic)):
raise TypeError("The second unnamed argument must be a problem")
if not isinstance(args[2], int):
raise TypeError(
"The third unnamed argument must be an integer (i.e. number of islands)")
if not isinstance(args[3], int):
raise TypeError(
"The fourth unnamed argument must be an integer (i.e. population size)")
for n in range(args[2]):
self.push_back(island(args[0], args[1], args[3]))