如何从函数外部访问函数内定义的变量

问题描述：

我坚持使用另一个函数中前一个函数中定义的变量。例如，我有这样的代码：

I am stuck on using variables defined in a previous function in another function. For example, I have this code:

def get_two_nums():
    ...
    ...
    op = ...
    num1 = ...
    num2 = ...
    answer = ...

def question():
    response = int(input("What is {} {} {}? ".format(num1, op, num2)))
    if response == answer:
        .....

如何使用第二个函数中第一个函数定义的变量？预先感谢您

How will I use the variables defined in the first function in the second function? Thank you in advance

答

变量是函数的局部变量，你需要 return 你想要分享给调用者的相关值，并将它们传递给使用它们的下一个函数。像这样：

Variables are local to the functions; you need to return the relevant values you want to share to the caller and pass them to the next function that uses them. Like this:

def get_two_nums():
    ...
    # define the relevant variables
    return op, n1, n2, ans

def question(op, num1, num2, answer):
    ...
    # do something with the variables

现在您可以拨打电话

Now you can call

question(*get_two_nums()) # unpack the tuple into the function parameters

或

op, n1, n2, ans = get_two_nums()
question(op, n1, n2, ans)

如何从函数外部访问函数内定义的变量

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