AttributeError: 'tuple' object has no attribute

Question

I’m a beginner in python. I’m not able to understand what the problem is?

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:

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'

Asked By: Alok

||

Source

Answer 1

You’re returning a tuple. Index it.

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!"

Answered By: Ignacio Vazquez-Abrams

Answer 2

Variables names are only locally meaningful.

Once you hit

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.

If you want the variable names to be meaningful after you hit return in the method, you must create an object or dictionary.

Answered By: Patashu

Answer 3

You return four variables s1,s2,s3,s4 and receive them using a single variable obj. This is what is called a tuple, obj is 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.

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!"

Answered By: Aswin Murugesh

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()

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

Answered By: Enis Bilgin

Answer 5

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

Answered By: nanakweku

Answer 6

You are returning four values from a function and storing them in a variable obj, it does not mean obj is an object. So you can’t access the values as obj.s1, obj.s2… instead, use obj[index] to access values.

print(obj[0])

Answered By: Sriram

Answer 7

When multiple values are returned from a function as comma-separated, they will be returned as a tuple. So obj here will be a tuple with values (s1, s2, s3, s4).

>>>print(type())
<class 'tuple'>

>>>print(obj[0]) # will print value of s1
"More organized code"

Answered By: Manu mathew

AttributeError: 'tuple' object has no attribute

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