1 files changed, 80 insertions, 0 deletions
diff --git a/robot/problems/introduction/wall1m/common.py~ b/robot/problems/introduction/wall1m/common.py~
new file mode 100644
index 0000000..319cea2
--- /dev/null
+++ b/robot/problems/introduction/wall1m/common.py~
@@ -0,0 +1,80 @@
+# 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 = 215
+group = 'introduction'
+number = 6
+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( 'ultrasonic' )
+robot.move_steering( 'on', power=80 )
+while robot.ultrasonic_sensor_measure( 'distance-cm' ) > 500:
+	pass
+robot.move_steering( 'on', power=20 )
+while robot.ultrasonic_sensor_measure( 'distance-cm' ) > 200:
+	pass
+robot.move_steering( 'off' )
+'''
+
+hint_type = {
+    'mW_init': Hint('mW_init'),
+    'connectMotorLeft': Hint('connectMotorLeft'),
+    'connectMotorRight': Hint('connectMotorRight'),
+    'moveSteeringOn': Hint('moveSteeringOn'),
+    'moveSteeringOff': Hint('moveSteeringOff'),
+    'connectUltrasonicSensor': Hint('connectUltrasonicSensor'),
+    'ultrasonicSensorMeasure': Hint('ultrasonicSensorMeasure'),
+    'power80': Hint('power80'),
+    'power20': Hint('power20'),
+    'while': Hint('while')
+}
+
+def hint( code ):
+    tokens = get_tokens(code)
+	lines = code.split('\n')
+
+    # 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_sensor', '(']) and 'ultrasonic' in code) :
+        return [{'id': 'connectUltrasonicSensor'}]
+
+    if not (has_token_sequence(tokens, ['move_steering', '(']) and 'on' in code):
+        return [{'id': 'moveSteeringOn'}]
+
+    if not (has_token_sequence(tokens, ['move_steering', '(']) and 'off' in code):
+        return [{'id': 'moveSteeringOff'}]
+
+    #if not (has_token_sequence(tokens, ['ultrasonic_sensor_measure', '(']) and 'distance-cm' in code):
+	if not any(('ultrasonic_sensor_measure' in s and '(' in s and 'distance-cm' in s) for s in lines)
+        return [{'id': 'ultrasonicSensorMeasure'}]
+
+    if not any(('power' in s and '80' in s and '=' in s) for s in lines):
+        return [{'id': 'power80'}]
+    
+    if not any(('power' in s and '20' in s and '=' in s) for s in lines):
+        return [{'id': 'power20'}]
+    
+    if not has_token_sequence(tokens, ['while']):
+        return [{'id': 'while'}]
+
+    return None