AttributeError:'tuple'对象没有属性

Question

我是python的初学者.我无法理解问题所在？

def list_benefits():

        s1 = "More organized code"
        s2 = "More readable code"
        s3 = "Easier code reuse"
        s4 = "Allowing programmers to share and connect code together"
        return s1,s2,s3,s4

def build_sentence():

        obj=list_benefits()
        print obj.s1 + " is a benefit of functions!"
        print obj.s2 + " is a benefit of functions!"
        print obj.s3 + " is a benefit of functions!"

print build_sentence()

我得到的错误是:

Traceback (most recent call last):
   Line 15, in <module>
   print build_sentence()
   Line 11, in build_sentence
   print obj.s1 + " is a benefit of functions!"
AttributeError: 'tuple' object has no attribute 's1'

Answer 1

返回四个变量s1,s2,s3,s4并使用单个变量接收它们obj.这就是所谓的a tuple,obj与4个值相关联,值为s1,s2,s3,s4.因此,在列表中使用索引按顺序获取所需的值.

obj=list_benefits()
print obj[0] + " is a benefit of functions!"
print obj[1] + " is a benefit of functions!"
print obj[2] + " is a benefit of functions!"
print obj[3] + " is a benefit of functions!"

Answer 2

你回来了tuple.索引它.

obj=list_benefits()
print obj[0] + " is a benefit of functions!"
print obj[1] + " is a benefit of functions!"
print obj[2] + " is a benefit of functions!"

Answer 3

变量名称仅在局部有意义。

一旦你打

return s1,s2,s3,s4

在该方法的末尾，Python 构造了一个元组，其中 s1、s2、s3 和 s4 的值作为它在索引 0、1、2 和 3 处的四个成员 - 不是变量名称到值的字典，不是具有变量的对象名称及其值等。

如果您希望在您点击return方法后变量名称有意义，您必须创建一个对象或字典。

Answer 4

class list_benefits(object):
    def __init__(self):
        self.s1 = "More organized code"
        self.s2 = "More readable code"
        self.s3 = "Easier code reuse"

def build_sentence():
        obj=list_benefits()
        print obj.s1 + " is a benefit of functions!"
        print obj.s2 + " is a benefit of functions!"
        print obj.s3 + " is a benefit of functions!"

print build_sentence()

我知道这是迟到的答案，也许其他一些人可以受益