Python AttributeError: 'tuple' 对象没有属性
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AttributeError: 'tuple' object has no attribute
提问by Alok
I'm a beginner in python. I'm not able to understand what the problem is?
我是python的初学者。我无法理解问题是什么？
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()
The error I'm getting is:
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'
采纳答案by Aswin Murugesh
You return four variables s1,s2,s3,s4 and receive them using a single variable obj. This is what is called a tuple, objis associated with 4 values, the values of s1,s2,s3,s4. So, use index as you use in a list to get the value you want, in order.
您返回四个变量 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，即 的值s1,s2,s3,s4。因此，在列表中使用 index 来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!"
回答by Ignacio Vazquez-Abrams
回答by Patashu
Variables names are only locally meaningful.
变量名称仅在局部有意义。
Once you hit
一旦你打
return s1,s2,s3,s4
return s1,s2,s3,s4
at the end of the method, Python constructs a tuple with the values of s1, s2, s3 and s4 as its four members at index 0, 1, 2 and 3 - NOT a dictionary of variable names to values, NOT an object with variable names and their values, etc.
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。
If you want the variable names to be meaningful after you hit returnin the method, you must create an object or dictionary.
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。
回答by Enis Bilgin
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()
I know it is late answer, maybe some other folk can benefit If you still want to call by "attributes", you could use class with default constructor, and create an instance of the class as mentioned in other answers
我知道这是迟到的答案，也许其他一些人可以受益
回答by nanakweku
I am working in python flask: I had the same problem... There was a "," after I declared my my form variables; I am working with wtforms. That is what caused all the confusion
我在 python flask 中工作：我遇到了同样的问题......在我声明我的表单变量之后有一个“，”；我正在使用 wtforms。这就是造成所有混乱的原因
