Question

def main():
    name = raw_input("What is your name?")
    age = raw_input("How old are you?")
    color = raw_input("What is your favorite color?")

print "Ah, so your name is %s, your quest is %s, " \
"and your favorite color is %s." % (name, age, color)
if __name__ == '__main__':
    main()

我正在尝试从Codeacademy复制以下代码：

name = raw_input("What is your name?")
quest = raw_input("What is your quest?")
color = raw_input("What is your favorite color?")

print "Ah, so your name is %s, your quest is %s, " \
"and your favorite color is %s." % (name, quest, color)

Answer 1

打印应该在main函数的范围内，以便访问其变量：

def main():
    name = raw_input("What is your name?")
    age = raw_input("How old are you?")
    color = raw_input("What is your favorite color?")

    print "Ah, so your name is %s, your quest is %s, " \
    "and your favorite color is %s." % (name, age, color)

if __name__ == '__main__':
    main()

应该这样做。

Answer 2

name，age和color都是main的本地人。因此，您无法在函数外部访问它们。

我认为这里最好的解决方案是缩进print第一行：

def main():
    name = raw_input("What is your name?")
    age = raw_input("How old are you?")
    color = raw_input("What is your favorite color?")

    print "Ah, so your name is %s, your quest is %s, " \
        "and your favorite color is %s." % (name, age, color)
if __name__ == '__main__':
    main()

现在，它与name，age和color的范围相同，可以很好地访问它们。

Answer 3

您设置name的唯一时间是您调用main功能时。在之后调用main函数的唯一时间是，因为print语句不是print的一部分。因此，名称未定义。

如果您打算复制codeacademy代码，则需要调整print语句的缩进，使其与main语句处于同一级别。这是因为python使用缩进量来知道一行代码所属的块。您希望print语句与输入语句位于同一个块中。

例如：

raw_input

Python一直在说NameError：名称'name'未定义

3 个答案: