Typeerror: set object is not subscriptable

Are you trying to access a specific element in a set using indexing or slicing, only to be met with a “TypeError: ‘set’ object is not subscriptable”?

Don’t worry, you’re not alone.

This error is a common issue encountered by Python programmers who are new to working with sets.

In this guide, we will explore the causes of this error and provide you with practical solutions to help you fix it.

So, let’s dive in and learn how to handle this error like a pro!

What does Typeerror set object is not subscriptable mean?

The Typeerror: set object is not subscriptable is a Python error that indicates an attempt to access a specific element in a set using indexing or slicing, which is not supported in sets.

Also, it occurs when you try to use square brackets to access an element of a set object.

In Python, sets are unordered collections of unique elements.

Unlike lists or tuples, you cannot use an index to access an element of a set.

Here is an example of how this error occurs:

my_set = {'it', 'source', 'code', 'Howdy'}
print(my_set[0])  # ❌

If we run this code it will output the following:

Traceback (most recent call last):
  File "C:\Users\Windows\PycharmProjects\pythonProject1\main.py", line 2, in <module>
    print(my_set[0])
TypeError: 'set' object is not subscriptable

Common causes of set object is not subscriptable error

Here are some common causes of the “TypeError: ‘set’ object is not subscriptable” error in Python:

• Trying to access an element of a set using square brackets
• Using a set as an index to access an element of another collection
• Attempting to concatenate a set with another collection using the + operator
• Using a set in a context where a subscriptable object is expected

How to solve Typeerror: ‘set’ object is not subscriptable

Here are some ways to fix the “TypeError: ‘set’ object is not subscriptable” error in Python.

1. Use a loop to iterate over the elements of the set

Since sets in Python are unordered collections of unique elements, they do not support indexing or slicing.

Therefore, you can use a loop to iterate over the elements one by one and access them without using indexing.

For example:

my_set = {'it', 'source', 'code', 'Howdy'}
for element in my_set:
    print(element)

Expected result:

code
it
Howdy
source

2. Convert the set to a list and use indexing or slicing

If you need to access elements of a set by index, you can convert the set to a list using the list() function, and then use indexing or slicing on the resulting list.

However, be aware that this will change the order of the elements in the set, and duplicates will be removed.

For example:

my_set = {'it', 'source', 'code', 'Howdy'}
my_list = list(my_set)
print(my_list[0])

Output:

source

3. Use the in keyword to check if an element is in the set

To check if a particular element is in a set, you can use the in keyword. This approach avoids using indexing altogether.

For example:

my_set = {'it', 'source', 'code', 'Howdy'}
if 'Howdy' in my_set:
    print("Howdy is in the set")

Output:

Howdy is in the set

4. Use square brackets to declare a list instead of a set

Alternatively, we can declare a list instead of a set object when using square brackets instead of curly braces.

my_list = ['it', 'source', 'code', 'Howdy']
print(my_list[0]) 
print(my_list[1]) 

Output:

it
source

5. Use parentheses to declare a tuple instead of a set

Here we declared tuples using parentheses.

my_tuple = ('it', 'source', 'code', 'Howdy')
print(my_tuple[0])
print(my_tuple[1])

Output:

it
source

Note: Tuples are immutable. Use list if you need a mutable data structure where the order is preserved.

Anyhow, if you are finding solutions to some errors you might encounter we also have TypeError can’t concat str to bytes.

Conclusion

In conclusion, the “TypeError: ‘set’ object is not subscriptable” error occurs when we try to access a specific element in a set using indexing or slicing, which is not supported in sets because they are unordered collections of unique elements.

If you want to get the element from the set using the index then you have to first convert the set into the list.

By trying the outlined solutions above, you can possibly fix the error.

Thank you for reading!

Glay Eliver

Programmer & Technical Writer at PIES IT Solution

Glay Eliver is a programmer and writer at PIES IT Solution, author of over 600 tutorials at itsourcecode.com. Specializes in JavaScript tutorials, Microsoft Office how-tos (Excel, Word, PowerPoint), and Python error debugging covering ImportError, TypeError, AttributeError, ModuleNotFoundError, and JavaScript ReferenceError. Authored several of the site’s highest-traffic Excel and MS Office reference articles.

Expertise: JavaScript · MS Excel · MS Word · MS PowerPoint · Python · Python ImportError · Python TypeError · Python AttributeError · ModuleNotFoundError · JavaScript ReferenceError · Pygame  · View all posts by Glay Eliver →