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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 = 214
group = 'introduction'
number = 3
visible = True
solution = '''\
import time
from ev3dev import *
from mindstorms_widgets import mindstorms_widgets
robot = mindstorms_widgets()
robot.connect_motor( 'left' )
robot.connect_motor( 'right' )
robot.move_tank( 'on_for_seconds', lr_power=[20,-20], seconds=.9 )
'''
hint_type = {
'mW_init': Hint('mW_init'),
'connectMotorLeft': Hint('connectMotorLeft'),
'connectMotorRight': Hint('connectMotorRight'),
'moveTank': Hint('moveTank'),
'onForSeconds': Hint('onForSeconds'),
'lrPower': Hint('lrPower'),
'seconds': Hint('seconds'),
}
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_tank']):
return [{'id': 'moveTank'}]
if not has_token_sequence(tokens, ['on_for_seconds']):
return [{'id': 'onForSeconds'}]
if not has_token_sequence(tokens, ['lr_power']):
return [{'id': 'lrPower'}]
if not has_token_sequence(tokens, ['seconds']):
return [{'id': 'seconds'}]
return None
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