Number Guessing Game Mark Crabtree

import random
import os
import time

'''
Number Guessing Game - Mark Crabtree
This game will allow the user to think of a number and the computer will attempt to guess it or vice versa
Release 1.0 - 10/11/2018
'''
def compThink():
    #set primary variables, and clear the screen
    guessedCorrectly = False
    userInput = 0
    os.system('cls')
    #generate random number for target
    targetNum = random.randint(1, 1000)
    print("Ok I am thinking of a number between 1 and 1000")

    #Main guessing Loop, Check users guess and advise them of their status.
    while guessedCorrectly == False:
        print("Please Enter a Guess: ")
        userInput = int((input()))
        if userInput < targetNum:
            print("Nope thats not it. The number is higher.")
        if userInput > targetNum:
            print("Nope thats not it. The number is lower.")
        if userInput == targetNum:
            print("Congratulations! You guessed it!")
            guessedCorrectly = True

        #Wait for user, then activate Main Menu
    input()
    main_menu()



def userThink():
    #set primary variables, and clear the screen
    guessedCorrectly = False
    userInput = ""
    lowerBound = 1
    upperBound = 1000
    #set computers initial guess with a pre set upper and lower bounds
    currentGuess = random.randint(lowerBound, upperBound)
    os.system('cls')
    print("Ok, Please Think of a NUmber between 1 and 1000")
    print("I will attempt to guess the number, you can respond with h for higher, l for lower, or c for correct!")
    print()
    time.sleep(1.5)

    #begin guess loop - adjust lower and upper bounds as guess is narrowed down by the user.
    while guessedCorrectly == False:
        userInput = input("Is your number " + str(currentGuess)  + "?")

        if userInput == "h":
            lowerBound = currentGuess + 1;
            currentGuess = random.randint(lowerBound, upperBound)
            time.sleep(1)
        elif userInput == "l":
            upperBound = currentGuess - 1;
            currentGuess = random.randint(lowerBound, upperBound)
            time.sleep(1)
        elif userInput == "c":
            print("Congratulations to me! I guessed it!")
            guessedCorrectly = True
        else:
            #Input Validation
            print("Please enter an h for higher, l for lower, or c for correct")

    #Wait for user, then activate Main Menu
    input()
    main_menu()





def main_menu():
    #Main Menu loop
    #clear the console screen
    os.system('cls')

    #Present Menu Options and check for input validation
    print("Welcome to the Number Guessing Game 1.0")
    print("---------------------------------------")
    print("Please choose from one of the options below:")
    print()
    print("1. The computer will think of a number")
    print("2. The user will think of a number")
    print("3. Exit the Game")
    print()

    #store Users Response and Validate
    userInput = (input())

    if userInput == "1":
        compThink()
    elif userInput == "2":
        userThink()
    elif userInput == "3":
        exit()
    else:
        main_menu()

#Main Menu Loop call
main_menu()