python - determinating if the input is even or odd numbers -

hello trying write program in python asks user input set of numbers of 1's , 0's , want program tell me if have , number of zeros or odd number of zeros or no zero's @ all. help!!

forstate = "start" curstate = "start" trans = "none" value = 0   print "former state....:", forstate print "transition....:", trans print "current state....", curstate     while curstate != "you hav , number of zeros":         trans = raw_input("input 1 or 0: ")         if trans == "0" , value <2:             value = value + 1             forstate = curstate         elif trans == "1" , value < 2:             value = value + 0             forstate = curstate         curstate = str(value) + "  zeros"         if value >= 2:             curstate = "you have , number of zeros"         print "former state ...:", forstate         print "transition .....:", trans         print "current state....", curstate 

looks you're trying finite state machine?

try:     inp = raw_input except nameerror:     inp = input  def getint(msg):     while true:         try:             return int(inp(msg))         except valueerror:             pass  start, odd, = range(3) state_next = [odd, even, odd] state_str  = ['no zeros yet', 'an odd number of zeros', 'an number of zeros']  state = start while true:     num = getint('enter number (-1 exit)')      if num==-1:         break     elif num==0:         state = state_next[state]      print 'i have seen {0}.'.format(state_str[state]) 

edit:

try:     inp = raw_input except nameerror:     inp = input  start, odd, = range(3) state_next = [odd, even, odd] state_str  = ['no zeros yet', 'an odd number of zeros', 'an number of zeros']  def reduce_fn(state, ch):     return state_next[state] if ch=='0' else state  state = reduce(reduce_fn, inp('enter @ own risk: '), start) print "i have seen " + state_str[state]