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# coding=utf-8
from python.util import has_token_sequence, string_almost_equal, \
string_contains_number, get_tokens, get_numbers, get_exception_desc
from server.hints import Hint, HintSequence
id = 210
group = 'introduction'
number = 8
visible = True
solution = '''\
from ev3dev import *
from mindstorms_widgets import mindstorms_widgets
robot = mindstorms_widgets()
robot.connect_motor( 'left' )
robot.connect_motor( 'right' )
robot.connect_sensor( 'gyro' )
robot.gyro_set_mode( 'angle' )
robot.reset_gyro()
power = 20
def forward_and_turnRight(power, angle):
robot.move_steering( 'on_for_seconds', direction=0, power=power, seconds=2 )
robot.move_tank( 'on', lr_power=[power,-power] )
while robot.gyro_sensor_measure( 'angle' ) < angle:
pass
robot.move_tank( 'off' )
forward_and_turnRight(power, 89)
forward_and_turnRight(power, 179)
forward_and_turnRight(power, 269)
forward_and_turnRight(power, 359)
'''
hint_type = {
'mW_init': Hint('mW_init'),
'connectMotorLeft': Hint('connectMotorLeft'),
'connectMotorRight': Hint('connectMotorRight'),
'moveSteering': Hint('moveSteering'),
'onForSeconds': Hint('onForSeconds'),
'direction': Hint('direction'),
'seconds': Hint('seconds'),
'connectGyro': Hint('connectGyro'),
'resetGyro': Hint('resetGyro'),
'setGyroMode': Hint('setGyroMode'),
'gyroMeasure': Hint('gyroMeasure'),
'moveTank': Hint('moveTank'),
'lrPower': Hint('lrPower'),
'while': Hint('while')
}
def hint( code):
tokens = get_tokens(code)
# if code does not include mindstorms_widgets(), a student gets a hint that the robot should be somehow represented in the program
if not has_token_sequence(tokens, ['mindstorms_widgets', '(',')']):
return [{'id': 'mW_init'}]
# if code does not include connect_motor statement, a student needs to learn about how to connect the motors
if not has_token_sequence(tokens, ['connect_motor']) and not has_token_sequence(tokens, ['left']):
return [{'id': 'connectMotorLeft'}]
# if code does not include connect_motor statement, a student needs to learn about how to connect the motors
if not has_token_sequence(tokens, ['connect_motor']) and not has_token_sequence(tokens, ['right']):
return [{'id': 'connectMotorRight'}]
if not (has_token_sequence(tokens, ['connect_gyro','(']) and 'gyro' in code):
return [{'id': 'connectGyro'}]
if not has_token_sequence(tokens, ['reset_gyro()']):
return [{'id': 'resetGyro'}]
if not has_token_sequence(tokens, ['gyro_set_mode']):
return [{'id': 'setGyroMode'}]
if not has_token_sequence(tokens, ['gyro_sensor_measure()']):
return [{'id': 'gyroMeasure'}]
if not has_token_sequence(tokens, ['move_tank']):
return [{'id': 'moveTank'}]
if not has_token_sequence(tokens, ['move_steering']):
return [{'id': 'moveSteering'}]
if not 'on_for_seconds' in code:
return [{'id': 'onForSeconds'}]
if not 'direction' in code:
return [{'id': 'direction'}]
if not 'seconds' in code:
return [{'id': 'seconds'}]
if not 'lr_power' in code:
return [{'id': 'lrPower'}]
if not has_token_sequence(tokens, ['while']):
return [{'id': 'while'}]
return None
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