structopt.common.population.Population

class structopt.common.population.Population(parameters, individuals=None)

Bases: structopt.tools.sorted_dict.SortedDict

A list-like class that contains the Individuals and the operations to be run on them.

add(individual)

Adds an Individual to the population.

allgather(individuals_per_core)

Performs an MPI.allgather on self (the population) and updates the

correct individuals that have been modified based on the inputs from individuals_per_core.

See stuctopt.tools.parallel.allgather for a similar function.

(@parallel) Designed to run code that runs differently on different cores. The MPI functionality should be implemented inside these functions.

apply_fingerprinters()

Apply fingerprinters on the entire population.

(@parallel) Designed to run code that runs differently on different cores. The MPI functionality should be implemented inside these functions.

bcast()

Performs and MPI.bcast on self.

(@parallel) Designed to run code that runs differently on different cores. The MPI functionality should be implemented inside these functions.

calculate_fitnesses()

Perform the fitness evaluations on the entire population.

(@parallel) Designed to run code that runs differently on different cores. The MPI functionality should be implemented inside these functions.

clear() → None. Remove all items from od.

copy() → a shallow copy of od

crossover(pairs)

Perform crossovers on the population.

(@parallel) Designed to run code that runs differently on different cores. The MPI functionality should be implemented inside these functions.

extend(individuals)

Overwrites and adds to the population using the id attribute of the individuals as a keyword. Assigns an id to an individual if it doesn’t already have one.

fromkeys(S[, v]) → New ordered dictionary with keys from S.

If not specified, the value defaults to None.

get(k[, d]) → D[k] if k in D, else d. d defaults to None.

get_by_position(position)

Returns the individual at position position.

get_new_id()

items() → a set-like object providing a view on D's items

keys() → a set-like object providing a view on D's keys

kill()

Remove individuals from the population based on a predator scheme.

(@parallel) Designed to run code that runs differently on different cores. The MPI functionality should be implemented inside these functions.

load_modules()

mutate()

Perform mutations on the population.

(@root) Designed to run on the root node only.

pop(k[, d]) → v, remove specified key and return the corresponding

value. If key is not found, d is returned if given, otherwise KeyError is raised.

popitem() → (k, v), return and remove a (key, value) pair.

Pairs are returned in LIFO order if last is true or FIFO order if false.

position(individual)

Returns the position of the individual in the population.

relax()

Relax the entire population.

(@parallel) Designed to run code that runs differently on different cores. The MPI functionality should be implemented inside these functions.

remove(individual)

Removes individual form the population.

replace(a_list)

Deletes the current list of individuals and replaces them with the ones in a_list.

run_pso_moves(best_swarm, best_particles)

Perform PSO moves on the population.

(@root) Designed to run on the root node only.

select()

Select the individuals in the population to perform crossovers on.

(@root) Designed to run on the root node only.

setdefault(k[, d]) → od.get(k,d), also set od[k]=d if k not in od

update(individuals)

Overwrites and adds to the population using the id attribute of the individuals as a keyword. Assigns an id to an individual if it doesn’t already have one.

values() → an object providing a view on D's values