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obj接收它们。这就是所谓的tuple，obj与4个值相关联，s1,s2,s3,s4的值。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

您将返回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

变量名称仅在本地有意义。

一旦你点击

return s1,s2,s3,s4

在方法结束时，Python构造一个元组，其值为s1，s2，s3和s4作为其在索引0,1,2和3处的四个成员 - 不是变量名称到值的字典，而不是具有变量名称及其值等的对象

如果您希望在方法中点击return后变量名称有意义，则必须创建对象或字典。

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如果您仍想通过＆＃34;属性＆＃34;进行调用，则可以使用带默认构造函数的类，并创建其他答案中提到的类的实例

Answer 5

我在python烧瓶中工作：我遇到了同样的问题……在声明我的表单变量后出现了一个“，”；我正在使用wtforms。那就是造成所有混乱的原因

AttributeError：'tuple'对象没有属性

5 个答案: