Rock Paper Scissors game (Python)

rockpaperscissors.py

human_score = 0
computer_score = 0

def choice_to_number(x):
    return {'rock':1,'paper':2,'scissors':3}[x]
    #print(mydict[name])

def random_choice():
    import random
    return random.choice(['rock','paper','scissors'])
    
def number_to_choice(random_choice):
    return {1:'rock',2:'paper',3:'scissors'}[random_choice]

def choice_result(human_choice, computer_choice):   
    import time
    time.sleep(1)
    print('rock...')
    time.sleep(1)
    print('paper...')
    time.sleep(1)
    print('scissors...')
    print('SHOOT!')
    time.sleep(1)

    if (human_choice == 1 and computer_choice == 2) or (human_choice == 2 and computer_choice == 3) or (human_choice == 3 and computer_choice == 1):
        global computer_score
        computer_score +=1
        print('You chose {} and the computer chose {}.  You lose, good day sir!'.format(choice.upper(), computer_choice_n.upper()))
    
    elif (human_choice == 2 and computer_choice ==1) or (human_choice == 3 and computer_choice == 2) or (human_choice == 1 and computer_choice == 3):
        global human_score
        human_score +=1
        print('You chose {} and the computer chose {}.  You win!'.format(choice.upper(), computer_choice_n.upper()))
        
    else:
        print('You chose {} and the computer chose {}.  It is a tie'.format(choice.upper(), computer_choice_n.upper()))

###GAME STARTS HERE
x = True
while x == True:
    choice = input("Make your choice: rock, paper, or scissors?   ")

    if choice not in ['rock','paper','scissors']:
        print('That is not an available option.  Please try again.')
        continue

    human_choice = choice_to_number(choice)  ## Converts the user's input into a number
    computer_choice = choice_to_number(random_choice()) ##Takes a randomly generated choice, and converts it a number
    computer_choice_n = number_to_choice(computer_choice) ##This is  the randomly generated choice in name form. Used for returning text
    choice_result(human_choice, computer_choice) ##compares values, spits out result, tallies the score
    print('\n')
    print("Your wins: " + str(human_score))
    print("Computers wins: " + str(computer_score))
    print('\n')
    if input("Do you want to play again? ")[0].lower() == 'y':
        continue
    else:
        x = False