Python灵性动物测验程序故障求助：执行中断问题排查

我开发了一个基于两道题答案选择灵性动物的Python程序，要求main()外至少包含4个函数。目前问题环节能正常运行，但程序执行后会中断，附上代码请求排查故障原因：

def main():
    colors()    
    foods()
    results()

def colors():
    colors = float(int(input('What is your favorite color of the following choices:\n\nPress 1 for Pink\nPress 2 for Blue\nPress 3 for Green\n\n')))
    if colors != 1 and colors != 2 and colors != 3:
        colors = float(int(input('Invalid option. Try again:\n')))
                          

def foods():
    foods = float(int(input('Nice! Now what is your favorite food of the following choices:\n\nPress 1 for Steak\nPress 2 for Chicken\nPress 3 for Seafood\n\n')))
                 
    if foods != 1 and foods != 2 and foods != 3:
        foods = float(int(input('Invalid option. Try again:\n')))

def results():
    if (colors == 1) and (foods == 1):
        print('Your spirit animal is...', Eagle)
    elif (colors == 1) and (foods == 2):
        print('Your spirit animal is...', Wolf)
    elif (colors == 1) and (foods == 3):
        print('Your spirit animal is...', Horse)
    elif (colors == 2) and (foods == 1):
        print('Your spirit animal is...', Deer)
    elif (colors == 2) and (foods == 2):
        print('Your spirit animal is...', Tiger)
    elif (colors == 2) and (foods == 3):
        print('Your spirit animal is...', Lion)
    elif (colors == 3) and (foods == 1):
        print('Your spirit animal is...', Turtle)
    elif (colors == 3) and (foods == 2):
        print('Your spirit animal is...', Hawk)
    elif (colors == 3) and (foods == 3):
        print('Your spirit animal is...', Bear)

def animals():
    Eagle = print('Eagle\n\nYou are strong, brave, creative, and insightful')
    Wolf = print('Wolf\n\nYou have a high sense of loyalty and communication')
    Horse = print('Horse\n\nYou embody independence and freedom')
    Deer = print('Deer\n\nYou are gentle, strong, and love unconditionally')
    Tiger = print('Tiger\n\nYou are strong, beautiful and independent')
    Lion = print('Lion\n\nYou are a brave and outspoken leader')
    Turtle = print('Turtle\n\nYou are wise and patient')
    Hawk = print('Hawk\n\nYou are a symbol of clarity and truth')
    Bear = print('Bear\n\nYou are strong, courageous and wise')

main()

故障原因分析 #

• 变量作用域错误：colors()和foods()函数中定义的colors、foods是局部变量，results()函数无法访问这些变量，执行时会触发NameError。
• 输入验证不完整：当前只做了一次无效输入检查，如果用户再次输入错误值，程序依然会接受无效值，应该用循环持续验证直到输入合法。
• 动物描述函数未调用且逻辑错误：animals()函数从未被执行，而且里面将print()的返回值（None）赋值给变量，这些变量也从未被results()使用。
• 未定义的动物变量：results()中使用的Eagle、Wolf等变量未定义，执行时会触发NameError。

修正后的代码示例 #

def main():
    color_choice = colors()    
    food_choice = foods()
    results(color_choice, food_choice)

def colors():
    while True:
        try:
            choice = int(input('What is your favorite color of the following choices:\n\nPress 1 for Pink\nPress 2 for Blue\nPress 3 for Green\n\n'))
            if choice in (1, 2, 3):
                return choice
            else:
                print('Invalid option. Try again:')
        except ValueError:
            print('Please enter a valid number.')

def foods():
    while True:
        try:
            choice = int(input('Nice! Now what is your favorite food of the following choices:\n\nPress 1 for Steak\nPress 2 for Chicken\nPress 3 for Seafood\n\n'))
            if choice in (1, 2, 3):
                return choice
            else:
                print('Invalid option. Try again:')
        except ValueError:
            print('Please enter a valid number.')

def get_animal_description(animal_name):
    descriptions = {
        'Eagle': 'Eagle\n\nYou are strong, brave, creative, and insightful',
        'Wolf': 'Wolf\n\nYou have a high sense of loyalty and communication',
        'Horse': 'Horse\n\nYou embody independence and freedom',
        'Deer': 'Deer\n\nYou are gentle, strong, and love unconditionally',
        'Tiger': 'Tiger\n\nYou are strong, beautiful and independent',
        'Lion': 'Lion\n\nYou are a brave and outspoken leader',
        'Turtle': 'Turtle\n\nYou are wise and patient',
        'Hawk': 'Hawk\n\nYou are a symbol of clarity and truth',
        'Bear': 'Bear\n\nYou are strong, courageous and wise'
    }
    return descriptions.get(animal_name, 'Unknown animal')

def results(color, food):
    animal_map = {
        (1, 1): 'Eagle',
        (1, 2): 'Wolf',
        (1, 3): 'Horse',
        (2, 1): 'Deer',
        (2, 2): 'Tiger',
        (2, 3): 'Lion',
        (3, 1): 'Turtle',
        (3, 2): 'Hawk',
        (3, 3): 'Bear'
    }
    animal = animal_map.get((color, food))
    print(f'Your spirit animal is... {animal}')
    print(get_animal_description(animal))

main()

内容的提问来源于stack exchange，提问作者Cody Dannelly