def test_stays_at_low_point(self):
gen = hill_climb.seek(0, 0.1, lambda x: math.fabs(x))
count = 0
for x, y in gen:
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertEqual(count, 0)
def cosine_slope():
turtle.setworldcoordinates(-6.2, -12, 6.2, 12)
f = lambda x: -x + 5 * math.cos(x)
demo = Demo(f)
demo.start(-6)
demo.bag([x * 0.1 for x in range(-62, 62)])
gen = hill_climb.seek(-6, 0.1, f)
for x, y in gen:
demo.move(x, y, False)
def quadratic():
turtle.setworldcoordinates(-12, -2, 12, 102)
f = lambda x: x**2
demo = Demo(f)
demo.start(-10)
demo.bag([x * 0.5 for x in range(-20, 21)])
gen = hill_climb.seek(-10, 0.5, f)
for x, y in gen:
demo.move(x, y, False)
def slanty_bag():
turtle.setworldcoordinates(-2.2, -2, 12.2, 22)
demo = Demo(slanty_bag_curve)
demo.bag([x * 0.5 for x in range(-1, 22)])
x = -0.5
step = 0.1
demo.start(x)
gen = hill_climb.seek(x, step, slanty_bag_curve)
for x, y in gen:
demo.move(x, y, False)
def stuck():
turtle.setworldcoordinates(-12, -1, 12, 15)
f = lambda x: math.fabs(x)
demo = Demo(f)
start = -10
step = 3
demo.start(start)
demo.bag(range(-10, 11))
gen = hill_climb.seek(start, step, f)
for x, y in gen:
demo.move(x, y, False)
def test_goes_right_if_right_lower(self):
gen = hill_climb.seek(0, 0.1, lambda x: -x)
for x, y in gen:
self.assertEqual(x, 0.1)
break
def test_flatline_goes_right(self):
gen = hill_climb.seek(0, 0.1, lambda x: 1)
for x, y in gen:
self.assertEqual(x, 0.1)
break # will keep going right