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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
id = 208
group = 'introduction'
number = 2
visible = True
solution = '''\
from ev3dev import *
from mindstorms_widgets import mindstorms_widgets
robot = mindstorms_widgets()
robot.connect_motor( 'left' )
robot.connect_motor( 'right' )
robot.move_steering( 'on_for_rotations', direction=0, rotations=5.71 )
'''
hint_type = {
'mW_init': Hint('mW_init'),
'connectMotorLeft': Hint('connectMotorLeft'),
'connectMotorRight': Hint('connectMotorRight'),
'moveSteering': Hint('moveSteering'),
'onForRotations': Hint('onForRotations'),
'direction': Hint('direction'),
'rotations': Hint('rotations'),
}
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, ['move_steering']):
return [{'id': 'moveSteering'}]
if not 'on_for_rotations' in code:
return [{'id': 'onForRotations'}]
if not 'direction' in code:
return [{'id': 'direction'}]
if not 'rotations' in code:
return [{'id': 'rotations'}]
return None
|
