在Python中的两个函数之间传递字符串变量

我无法将变量从一个函数传递到另一个函数：

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姓氏（）

我总是得到一个错误，第一个_名称没有定义，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？

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()

如果查看文档中的示例，您可以看到它们是如何使用的，例如：

---

也许您应该阅读一些基础教程，您可以在python主页上找到许多教程：

您还可以使用while循环不断询问名称，直到有有效的输入

def name_find():
   while True:
       first_name=raw_input("What is your name? ")
       if len(first_name)==0:
           print("\nYou did not enter a name!")
           return name_find()
       else:
           print("\nHello %s." % first_name)
           return surname(first_name)
def surname(first_name):
   while True:
      last_name=raw_input("\nCan you tell me your last name please?")
      if len(last_name)==0:
          print("\nYou did not enter a last name!")
     else:
          print "Nice to meet you %s %s." % (first_name, last_name)
          break

---

更改

姓氏

函数为

姓氏（名字）

并使用

返回姓氏（名字）

def name_find():
   while True:
       first_name=raw_input("What is your name? ")
       if len(first_name)==0:
           print("\nYou did not enter a name!")
           return name_find()
       else:
           print("\nHello %s." % first_name)
           return surname(first_name)
def surname(first_name):
   while True:
      last_name=raw_input("\nCan you tell me your last name please?")
      if len(last_name)==0:
          print("\nYou did not enter a last name!")
     else:
          print "Nice to meet you %s %s." % (first_name, last_name)
          break