Question

SoftwareLab 2:
I got some guidance from https://tetriminos.wordpress.com/category/education/mit-ocw/6-01-introduction-to-eecs-i/

Answer 1

##################################
# Double Delay SM
##################################

class Delay2Machine(sm.SM):
def __init__(self, val0, val1):
self.startState = (val0,val1)
def getNextValues(self, state, inp):
return ((state[1],inp),state[0])

Answer 2

class CommentsSM(sm.SM):
startState = 'Silent'
def getNextValues(self, state, inp):
if state == 'Silent':
if inp == '#':
return ('Echoing',inp)
else:
return ('Silent',None)
else:
if inp == '\n':
return ('Silent', None)
else:
return ('Echoing', inp)

Answer 3

class FirstWordSM(sm.SM):
startState = 'Start_of_Line'
def getNextValues(self, state, inp):
if state == 'Start_of_Line':
if inp!= '\n' and inp !=' ':
return ('Echoing',inp)
else:
return ('Start_of_Line',None)
elif state == 'Echoing':
if inp == '\n':
return ('Start_of_Line', None)
elif inp ==' ':
return('Silent',None)
else:
return ('Echoing', inp)
else:
if inp == '\n':
return ('Start_of_Line', None)
else:
return ('Silent',None)