def read(self):
'''returns velocity vector object'''
try:
return Velocity(x=self._get_x(), y=self._get_y())
except TypeError as e:
raise CorruptedSaveError(e)
except FasterThanLightError as e:
raise CorruptedSaveError(e)
def _velocity_input():
print(4 * ' ' + 'Type in values of the velocity vector: ')
try:
x = _number_input(8 * ' ' + 'x value: ')
y = _number_input(8 * ' ' + 'y value: ')
return Velocity(x, y)
except (ValueError, TypeError, FasterThanLightError, InputError) as e:
print(e)
return _velocity_input()
def __init__(self,
mass=Mass(earth_mass),
radius=Radius(earth_radius),
position=Position(0, 0)):
super().__init__(position, Velocity(0, 0), mass, radius)
if self.schwarzschild_radius() > self._radius:
raise TooSmallRadiusError(
f'Miniman radius can be {self.schwarzschild_radius()}')
def test_update_position():
p_obj_1 = PointObject(Position(0, 0), Velocity(0, 0))
p_obj_2 = PointObject(Position(0, 0), Velocity(10, 10))
p_obj_3 = PointObject(Position(0, 0), Velocity(-10, -10))
p_obj_1.update_position(0)
assert p_obj_1._position == Position(0, 0)
p_obj_1.update_position(5)
assert p_obj_1._position == Position(0, 0)
p_obj_2.update_position(1)
assert p_obj_2._position == Position(10, 10)
p_obj_2.update_position(5)
assert p_obj_2._position == Position(60, 60)
p_obj_3.update_position(2)
assert p_obj_3._position == Position(-20, -20)
def __init__(self, position=Position(0, 0), velocity=Velocity(0, 0)):
super().__init__(position, velocity, 0, 0)
PointObject.num_pointobjects += 1
def test_velocity_reader():
velocity_0 = VelocityReader(json.loads(save), 0).read()
velocity_1 = VelocityReader(json.loads(save), 1).read()
assert velocity_0 == Velocity(7540, 0)
assert velocity_1 == Velocity(-4540, 0)
def test_type_error():
with pytest.raises(TypeError):
Velocity('a', 1)
Position('b', 'da')
def test_faster_than_light_error():
with pytest.raises(FasterThanLightError):
Velocity(3 * 10**8, 0)
from physic_vectors import Velocity, Position, FasterThanLightError
import pytest
v2 = Velocity(12, 16)
v3 = Velocity(0, 0)
v4 = Velocity(-3, -4)
def test_type_error():
with pytest.raises(TypeError):
Velocity('a', 1)
Position('b', 'da')
def test_faster_than_light_error():
with pytest.raises(FasterThanLightError):
Velocity(3 * 10**8, 0)