Python 2.7 （Python）if语句的返回值未分配给if语句外部的变量

控制台上打印的内容是：（假设

选项
=“A”）

食肉动物

食肉动物

没有

这是否意味着饮食风格是不变的？如果是这样，我应该如何更改函数以将不同的值指定给
饮食风格
？
您的参数作为值传递。分配新值不会对其产生任何影响。您可以像这样返回一个新字符串

def my_diet(event, style):
    if event == 1:
        choice = raw_input("""What type of animal are you?
        A) Carnivore
        B) Herbivore
        C) Omnivore
        """)
        if choice == "A":
            style = "Carnivore"
            print style
        elif choice == "B":
            style = "Herbivore"
        elif choice == "C":
            style = "Omnivore"
        else:
            style = "not-sure-yet"
        print style
    else:
        pass
    return style
    print style

eating_style = None
my_diet(1, eating_style)
print eating_style

查看此链接以了解更多信息。

def my_diet(event):
    if event == 1:
        choice = raw_input("""What type of animal are you?
        A) Carnivore
        B) Herbivore
        C) Omnivore
        """)
        style = ""
        if choice == "A":
            style = "Carnivore"
        elif choice == "B":
            style = "Herbivore"
        elif choice == "C":
            style = "Omnivore"
        else:
            style = "not-sure-yet"
    else:
        pass
    return style

eating_style = my_diet(1)
print eating_style