python - 属性错误 : 'tuple' object has no attribute

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

您返回四个变量 s1,s2,s3,s4 并使用单个变量 obj 接收它们。这就是所谓的tuple，obj关联了4个值，s1,s2,s3,s4的值。因此，使用您在列表中使用的索引来按顺序获取您想要的值。

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!"