python - 在Python中的两个函数之间传递字符串变量

Question

我在将变量从一个函数传递到另一个函数时遇到问题:

def name():

    first_name=input("What is your name? ")

    if len(first_name)==0:
            print("\nYou did not enter a name!")
            return name()

    else:
            print("\nHello %s." % first_name)
            return surname()


def surname():

    last_name=input("\nCan you tell my your last name please?")

    if len(last_name)==0:
            print("\nYou did not enter a last name!")
            return surname()
    else:

            print("Nice to meet you %s %s." % (first_name,last_name))

我希望最后一个命令打印 def name() 中输入的名字和 def surname() 中输入的姓氏

我总是收到first_name未定义的错误，并且我不知道如何从第一个函数导入它。我得到的错误是:

    print("Nice to meet you %s %s." % (first_name,last_name))
NameError: name 'first_name' is not defined

我做错了什么？

Answer 1

您需要在函数调用中传递信息:

def name():

    first_name = input("What is your name? ")

    if len(first_name) == 0:
        print("\nYou did not enter a name!")
        return name()

    else:
        print("\nHello %s." % first_name)
        surname(first_name)  # pass first_name on to the surname function


def surname(first_name): #first_name arrives here ready to be used in this function

    last_name = input("\nCan you tell my your last name please?")

    if len(last_name) == 0:
        print("\nYou did not enter a last name!")
        surname(first_name)
    else:
        print("Nice to meet you %s %s." % (first_name,last_name))

name()