def test_hillclimb_and_restart_getting_worse():
# see whether we restart on each number correctly
def move_operator(i):
# even numbers only go up to 50
if i % 2 == 0 and i < 50:
yield i + 2
elif i % 2 != 0 and i < 100: # odd numbers go higher
yield i + 2
def init_function_gen():
yield 3 # start off on the odd numbers then restart on evens
while True:
yield 2
init_gen = init_function_gen()
init_function = lambda: init_gen.next()
num_evaluations, best_score, best = hillclimb.hillclimb_and_restart(init_function, move_operator,
objective_function, max_evaluations)
# should have used all iterations
assert num_evaluations == max_evaluations
# should have retained score from odd numbers
assert best == 101
assert best_score == 101
def test_hillclimb_and_restart_getting_worse():
'''
see whether we restart on each number correctly
'''
def move_operator(i):
# even numbers only go up to 50
if i % 2 == 0 and i < 50:
yield i + 2
elif i % 2 != 0 and i < 100: # odd numbers go higher
yield i + 2
def init_function_gen():
yield 3 # start off on the odd numbers then restart on evens
while True:
yield 2
init_gen = init_function_gen()
init_function = lambda: init_gen.next()
num_evaluations, best_score, best = hillclimb.hillclimb_and_restart(
init_function, move_operator, objective_function, max_evaluations)
# should have used all iterations
assert num_evaluations == max_evaluations
# should have retained score from odd numbers
assert best == 101
assert best_score == 101
def run_hillclimb(init_function, move_operator, objective_function,
max_iterations):
from hillclimb import hillclimb_and_restart
iterations, score, best = hillclimb_and_restart(init_function,
move_operator,
objective_function,
max_iterations)
return iterations, score, best
def run_hillclimb(init_function,move_operator,objective_function,max_iterations):
from hillclimb import hillclimb_and_restart
iterations,score,best=hillclimb_and_restart(init_function,move_operator,objective_function,max_iterations)
return iterations,score,best
