import random  

#
#  readInteger: reads an integer value from the user within a confined range
#
#  Parameters:
#    low: the lowest value that is accepted
#    high: the largest value that is accepted
#
#  Returns:
#    The first value entered by the user between low and high
#
def readInteger (low, high):
   retval = input ("Enter a number between " + str (low) + " and " + str (high) + ": ")
   while (retval < low) or (retval > high):
      print "That wasn't in the range!"
      retval = input ("Enter a number between " + str (low) + " and " + str (high) + ": ")
   return retval  


#
# constants, specifying the range in which the random number is picked
#
LOW = 1
HIGH = 100  


#
# play the game until the user says to stop
#
play = "yes"
while (play == "yes") :
   #
   #  Pick a random target value that the user is trying to guess
   #
   target = random.randrange (LOW, HIGH + 1)
  
   guess = target + 1 
   num_guesses = 0
   min_accepted = LOW
   max_accepted = HIGH  

   #
   #  Loop until the user has guessed the correct number
   #
   while (guess != target):
      #
      #  Read the guess from the user
      #
      guess = readInteger (min_accepted, max_accepted) 
      num_guesses = num_guesses + 1  

      #
      #  Advise the user if the guess was too high, too low, or just right
      #
      if (guess < target):
         print "That was too low!" 
         min_accepted = guess + 1

      if (guess > target):
         print "That was too high!" 
         max_accepted = guess - 1 

   print "It took you", num_guesses, "guesses!"  

   #
   # Ask the user whether he/she wants to play again
   #
   play = raw_input ("Do you want to play again (yes or no)? ")