def test_multiscan(self):
"""A 2D scan."""
other = LinearMotor()
values_0 = np.linspace(0, 10, 2) * q.mm
values_1 = np.linspace(5, 10, 3) * q.mm
range_0 = Region(self.motor['position'], values_0)
range_1 = Region(other['position'], values_1)
def feedback():
return self.motor.position, other.position
gen = resolve(scan(feedback, [range_0, range_1]))
p_0, p_1, result = zip(*gen)
result_x, result_y = zip(*result)
first_expected = [0 * q.mm, 10 * q.mm]
second_expected = [5 * q.mm, 7.5 * q.mm, 10 * q.mm]
combined = list(product(first_expected, second_expected))
p_0_exp, p_1_exp = zip(*combined)
# test parameter values
compare_sequences(p_0, p_0_exp, assert_almost_equal)
compare_sequences(p_1, p_1_exp, assert_almost_equal)
# feedback result is a tuple in this case, test both parts
compare_sequences(result_x, p_0_exp, assert_almost_equal)
compare_sequences(result_y, p_1_exp, assert_almost_equal)
def make_images(self, x_angle, z_angle, intervals=10):
self.x_motor.position = z_angle
self.z_motor.position = x_angle
values = np.linspace(0, 2 * np.pi, intervals) * q.rad
prange = Region(self.y_motor["position"], values)
result = [f.result()[1] for f in scan(self.image_source.grab, prange)]
return result
async def run():
other = LinearMotor()
scanned = []
async for pair in scan((self.motor['position'], other['position']),
(values_0, values_1),
self.feedback):
vec, res = pair
scanned.append((vec[0], vec[1], res))
return scanned
def test_process(self):
def feedback():
return self.motor.position
values = np.linspace(1, 10, 12) * q.mm
param_range = Region(self.motor['position'], values)
x, y = zip(*list(resolve(scan(feedback, param_range))))
compare_sequences(x, y, self.assertEqual)
def test_callback(self):
called = []
motor = LinearMotor()
values = np.linspace(0, 2, 3) * q.mm
qrange = Region(motor['position'], values)
def callback():
called.append(motor.position.to(q.mm).magnitude)
list(resolve(scan(lambda: None, qrange, callbacks={qrange: callback})))
np.testing.assert_almost_equal(called, range(3))
async def run():
scanned = []
async for pair in scan(self.motor['position'], np.arange(0, 10, 5) * q.mm,
self.feedback):
scanned.append(pair)
return scanned
async def make_images(self, x_angle, z_angle, intervals=10):
await self.x_motor.set_position(z_angle)
await self.z_motor.set_position(x_angle)
values = np.linspace(0, 2 * np.pi, intervals) * q.rad
async for pair in scan(self.y_motor["position"], values, self.image_source.grab):
yield pair[1]
def get_exposure_result(region):
def get_mean_frame_value():
return np.mean(camera.grab())
return scan(get_mean_frame_value, region)