typeerror 'method' object does not support item assignment

TypeError: builtin_function_or_method object is not subscriptable Python Error [SOLVED]

As the name suggests, the error TypeError: builtin_function_or_method object is not subscriptable is a “typeerror” that occurs when you try to call a built-in function the wrong way.

When a "typeerror" occurs, the program is telling you that you’re mixing up types. That means, for example, you might be concatenating a string with an integer.

In this article, I will show you why the TypeError: builtin_function_or_method object is not subscriptable occurs and how you can fix it.

Why The TypeError: builtin_function_or_method object is not subscriptable Occurs

Every built-in function of Python such as print() , append() , sorted() , max() , and others must be called with parenthesis or round brackets ( () ).

If you try to use square brackets, Python won't treat it as a function call. Instead, Python will think you’re trying to access something from a list or string and then throw the error.

For example, the code below throws the error because I was trying to print the value of the variable with square braces in front of the print() function:

And if you surround what you want to print with square brackets even if the item is iterable, you still get the error:

This issue is not particular to the print() function. If you try to call any other built-in function with square brackets, you also get the error.

In the example below, I tried to call max() with square brackets and I got the error:

How to Fix the TypeError: builtin_function_or_method object is not subscriptable Error

To fix this error, all you need to do is make sure you use parenthesis to call the function.

You only have to use square brackets if you want to access an item from iterable data such as string, list, or tuple:

Wrapping Up

This article showed you why the TypeError: builtin_function_or_method object is not subscriptable occurs and how to fix it.

Remember that you only need to use square brackets ( [] ) to access an item from iterable data and you shouldn't use it to call a function.

If you’re getting this error, you should look in your code for any point at which you are calling a built-in function with square brackets and replace it with parenthesis.

Thanks for reading.

Web developer and technical writer focusing on frontend technologies. I also dabble in a lot of other technologies.

If you read this far, thank the author to show them you care. Say Thanks

Learn to code for free. freeCodeCamp's open source curriculum has helped more than 40,000 people get jobs as developers. Get started

Explore your training options in 10 minutes Get Started

• Graduate Stories
• Partner Spotlights
• Bootcamp Prep
• Bootcamp Admissions
• University Bootcamps
• Coding Tools
• Software Engineering
• Web Development
• Data Science
• Tech Guides
• Tech Resources
• Career Advice
• Online Learning
• Internships
• Apprenticeships
• Tech Salaries
• Associate Degree
• Bachelor's Degree
• Master's Degree
• University Admissions
• Best Schools
• Certifications
• Bootcamp Financing
• Higher Ed Financing
• Scholarships
• Financial Aid
• Best Coding Bootcamps
• Best Online Bootcamps
• Best Web Design Bootcamps
• Best Data Science Bootcamps
• Best Technology Sales Bootcamps
• Best Data Analytics Bootcamps
• Best Cybersecurity Bootcamps
• Best Digital Marketing Bootcamps
• Los Angeles
• San Francisco
• Browse All Locations
• Digital Marketing
• Machine Learning
• See All Subjects
• Bootcamps 101
• Full-Stack Development
• Career Changes
• View all Career Discussions
• Mobile App Development
• Cybersecurity
• Product Management
• UX/UI Design
• What is a Coding Bootcamp?
• Are Coding Bootcamps Worth It?
• How to Choose a Coding Bootcamp
• Best Online Coding Bootcamps and Courses
• Best Free Bootcamps and Coding Training
• Coding Bootcamp vs. Community College
• Coding Bootcamp vs. Self-Learning
• Bootcamps vs. Certifications: Compared
• What Is a Coding Bootcamp Job Guarantee?
• How to Pay for Coding Bootcamp
• Ultimate Guide to Coding Bootcamp Loans
• Best Coding Bootcamp Scholarships and Grants
• Education Stipends for Coding Bootcamps
• Get Your Coding Bootcamp Sponsored by Your Employer
• GI Bill and Coding Bootcamps
• Tech Intevriews
• Our Enterprise Solution
• Connect With Us
• Publication
• Reskill America
• Partner With Us

• Resource Center
• Bachelor’s Degree
• Master’s Degree

Python TypeError: ‘builtin_function_or_method’ object is not subscriptable Solution

To call a built-in function, you need to use parentheses. Parentheses distinguish function calls from other operations that can be performed on some objects, like indexing.

If you try to use square brackets to call a built-in function, you’ll encounter the “TypeError: ‘builtin_function_or_method’ object is not subscriptable” error. 

Find your bootcamp match

In this guide, we talk about what this error means and why you may encounter it. We’ll walk through an example so that you can figure out how to solve the error.

TypeError: ‘builtin_function_or_method’ object is not subscriptable

Only iterable objects are subscriptable. Examples of iterable objects include lists , strings , and dictionaries. Individual values in these objects can be accessed using indexing. This is because items within an iterable object have index values .

Consider the following code:

Our code returns “English”. Our code retrieves the first item in our list, which is the item at index position 0. Our list is subscriptable so we can access it using square brackets.

Built-in functions are not subscriptable. This is because they do not return a list of objects that can be accessed using indexing.

The “TypeError: ‘builtin_function_or_method’ object is not subscriptable” error occurs when you try to access a built-in function using square brackets. This is because when the Python interpreter sees square brackets it tries to access items from a value as if that value is iterable.

An Example Scenario

We’re going to build a program that appends all of the records from a list of homeware goods to another list. An item should only be added to the next list if that item is in stock.

Start by defining a list of homeware goods and a list to store those that are in stock:

The “in_stock” list is presently empty. This is because we have not yet calculated which items in stock should be added to the list.

Next, we use a for loop to find items in the “homewares” list that are in stock. We’ll add those items to the “in_stock” list:

We use the append() method to add a record to the “in_stock” list if that item is in stock. Otherwise, our program does not add a record to the “in_stock” list. Our program then prints out all of the objects in the “in_stock” list.

Let’s run our code and see what happens:

Our code returns an error.

The Solution

Take a look at the line of code that Python points to in the error:

We’ve tried to use indexing syntax to add an item to our “in_stock” list variable . This is incorrect because functions are not iterable objects. To call a function, we need to use parenthesis.

We fix this problem by replacing the square brackets with parentheses:

Let’s run our code:

Our code successfully calculates the items in stock. Those items are added to the “in_stock” list which is printed to the console.

The “TypeError: ‘builtin_function_or_method’ object is not subscriptable” error is raised when you try to use square brackets to call a function.

This error is raised because Python interprets square brackets as a way of accessing items from an iterable object. Functions must be called using parenthesis. To fix this problem, make sure you call a function using parenthesis.

Now you’re ready to solve this common Python error like an expert!

About us: Career Karma is a platform designed to help job seekers find, research, and connect with job training programs to advance their careers. Learn about the CK publication .

What's Next?

Get matched with top bootcamps

Ask a question to our community, take our careers quiz.

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

'Proxy' object does not support item assignment

when using fx to tracing tsm, i get this error:

out[:, :-1, :fold] = x[:, 1:, :fold] TypeError: ‘Proxy’ object does not support item assignment

Hi @keyky , this is a limitation of symbolic tracing with FX. Here is a workaround using torch.fx.wrap:

How To Solve TypeError: ‘type’ object does not support item assignment in Python

Some situations in the working process make you forced to assign the data type to a variable. Sometimes there will be a TypeError: ‘type’ object does not support item assignment error . This article will show the cause of the error and some ways to fix it. Let’s start.

Table of Contents

What causes the error TypeError: ‘type’ object does not support item assignment

An error occurs when you change the value at an index of a variable assigned by the data type. The variable is only accessible when using the index of a mutable collection of objects. If you try to add the value at that index, the TypeError: ‘type’ object does not support item assignment will appear.

Error example:

Variables in Python can be used to store the data type. The value at the index position of this variable cannot be assigned data using the “ = ” operator.

Solutions for TypeError: ‘type’ object does not support item assignment.

Pass in a collection.

The cause of the error is missing a value while assigning to the variable. So you pass in a collection, and the error is resolved.

Use the insert() function

Create an empty List, then use the insert() function to add data to the List.

Parameters:

index: is the index position where the value will be added value: this is the value that will be added to the index position

Return Value:

This function does not return anything.

Store variable data types in a list

Create a list containing the data types, and assign the data type to the List index position.

You can learn more about some other common errors in this article .

So the TypeError: ‘type’ object does not support item assignment has been fixed quickly by using some alternative ways. Hope the article is helpful to you. Good luck.

Carolyn Hise has three years of software development expertise. Strong familiarity with the following languages is required: Python, Typescript/Nodejs, .Net, Java, C++, and a strong foundation in Object-oriented programming (OOP).

Related Posts

List.append() not working in python.

• Thomas Valen
• January 18, 2023

The list.append() function is used to add an element to the current list. Sometimes, list.append() […]

How To Print A List In Tabular Format In Python

To print a list in Tabular format in Python, you can use the format(), PrettyTable.add_rows(), […]

How To Solve The Error: “ModuleNotFoundError: No module named ‘google.protobuf'” in Python

The Error: “ModuleNotFoundError: No module named ‘google.protobuf’” in Python occurs because you have not installed […]

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Save my name, email, and website in this browser for the next time I comment.

[Solved] TypeError: ‘str’ Object Does Not Support Item Assignment

In this article, we will be discussing the TypeError:’str’ Object Does Not Support Item Assignment exception . We will also be going through solutions to this problem with example programs.

Why is This Error Raised?

When you attempt to change a character within a string using the assignment operator, you will receive the Python error TypeError: ‘str’ object does not support item assignment.

As we know, strings are immutable. If you attempt to change the content of a string, you will receive the error TypeError: ‘str’ object does not support item assignment .

There are four other similar variations based on immutable data types :

• TypeError: 'tuple' object does not support item assignment
• TypeError: 'int' object does not support item assignment
• TypeError: 'float' object does not support item assignment
• TypeError: 'bool' object does not support item assignment

Replacing String Characters using Assignment Operators

Replicate these errors yourself online to get a better idea here .

In this code, we will attempt to replace characters in a string.

Strings are an immutable data type. However, we can change the memory to a different set of characters like so:

TypeError: ‘str’ Object Does Not Support Item Assignment in JSON

Let’s review the following code, which retrieves data from a JSON file.

In line 5, we are assigning data['sample'] to a string instead of an actual dictionary. This causes the interpreter to believe we are reassigning the value for an immutable string type.

TypeError: ‘str’ Object Does Not Support Item Assignment in PySpark

The following program reads files from a folder in a loop and creates data frames.

This occurs when a PySpark function is overwritten with a string. You can try directly importing the functions like so:

TypeError: ‘str’ Object Does Not Support Item Assignment in PyMongo

The following program writes decoded messages in a MongoDB collection. The decoded message is in a Python Dictionary.

At the 10th visible line, the variable x is converted as a string.

It’s better to use:

Please note that msg are a dictionary and NOT an object of context.

TypeError: ‘str’ Object Does Not Support Item Assignment in Random Shuffle

The below implementation takes an input main and the value is shuffled. The shuffled value is placed into Second .

random.shuffle is being called on a string, which is not supported. Convert the string type into a list and back to a string as an output in Second

TypeError: ‘str’ Object Does Not Support Item Assignment in Pandas Data Frame

The following program attempts to add a new column into the data frame

The iteration statement for dataset in df: loops through all the column names of “sample.csv”. To add an extra column, remove the iteration and simply pass dataset['Column'] = 1 .

These are the causes for TypeErrors : – Incompatible operations between 2 operands: – Passing a non-callable identifier – Incorrect list index type – Iterating a non-iterable identifier.

The data types that support item assignment are: – Lists – Dictionaries – and Sets These data types are mutable and support item assignment

As we know, TypeErrors occur due to unsupported operations between operands. To avoid facing such errors, we must: – Learn Proper Python syntax for all Data Types. – Establish the mutable and immutable Data Types. – Figure how list indexing works and other data types that support indexing. – Explore how function calls work in Python and various ways to call a function. – Establish the difference between an iterable and non-iterable identifier. – Learn the properties of Python Data Types.

We have looked at various error cases in TypeError:’str’ Object Does Not Support Item Assignment. Solutions for these cases have been provided. We have also mentioned similar variations of this exception.

Trending Python Articles

Solve Python TypeError: 'tuple' object does not support item assignment

by Nathan Sebhastian

Posted on Dec 26, 2022

Reading time: 2 minutes

In Python, tuples are immutable sequences that cannot be modified once they are created. This means that you cannot change, add, or delete elements from a tuple.

When you try to modify a tuple using the square brackets and the assignment operator, you will get the “TypeError: ’tuple’ object does not support item assignment” error.

Consider the example below:

The above code tries to change the first element of the tuple from “Orange” to “Mango”.

But since a tuple is immutable, Python will respond with the following error:

There are two solutions you can use to edit a tuple in Python.

Solution #1: Change the tuple to list first

When you need to modify the elements of a tuple, you can convert the tuple to a list first using the list() function.

Lists are mutable sequences that allow you to change, add, and delete elements.

Once you have made the changes to the list, you can convert it back to a tuple using the tuple() function:

By converting a tuple into a list, you can modify its elements. Once done, convert it back to a tuple.

Solution #2: Create a new tuple

When you only need to modify a single element of a tuple, you can create a new tuple with the modified element.

To access a range of elements from a tuple, you can use the slice operator.

For example, the following code creates a new tuple by adding a slice of elements from an existing tuple:

The code fruits[1:] means you are slicing the fruits tuple to return the second element to the last.

Creating a new tuple is more efficient than converting the entire tuple to a list and back as it requires only one line of code.

But this solution doesn’t work when you need a complex modification.

The Python TypeError: tuple object does not support item assignment issue occurs when you try to modify a tuple using the square brackets (i.e., [] ) and the assignment operator (i.e., = ).

A tuple is immutable, so you need a creative way to change, add, or remove its elements.

This tutorial shows you two easy solutions on how to change the tuple object element(s) and avoid the TypeError.

Thanks for reading. I hope this helps! 🙏

Take your skills to the next level ⚡️

I'm sending out an occasional email with the latest tutorials on programming, web development, and statistics. Drop your email in the box below and I'll send new stuff straight into your inbox!

Hello! This website is dedicated to help you learn tech and data science skills with its step-by-step, beginner-friendly tutorials. Learn statistics, JavaScript and other programming languages using clear examples written for people.

Learn more about this website

Connect with me on Twitter

Or LinkedIn

Type the keyword below and hit enter

Click to see all tutorials tagged with:

TypeError: 'tuple' object does not support item assignment

Last updated: Apr 8, 2024 Reading time · 4 min

# TypeError: 'tuple' object does not support item assignment

The Python "TypeError: 'tuple' object does not support item assignment" occurs when we try to change the value of an item in a tuple.

To solve the error, convert the tuple to a list, change the item at the specific index and convert the list back to a tuple.

Here is an example of how the error occurs.

We tried to update an element in a tuple, but tuple objects are immutable which caused the error.

# Convert the tuple to a list to solve the error

We cannot assign a value to an individual item of a tuple.

Instead, we have to convert the tuple to a list.

This is a three-step process:

• Use the list() class to convert the tuple to a list.
• Update the item at the specified index.
• Use the tuple() class to convert the list back to a tuple.

Once we have a list, we can update the item at the specified index and optionally convert the result back to a tuple.

Python indexes are zero-based, so the first item in a tuple has an index of 0 , and the last item has an index of -1 or len(my_tuple) - 1 .

# Constructing a new tuple with the updated element

Alternatively, you can construct a new tuple that contains the updated element at the specified index.

The get_updated_tuple function takes a tuple, an index and a new value and returns a new tuple with the updated value at the specified index.

The original tuple remains unchanged because tuples are immutable.

We updated the tuple element at index 1 , setting it to Z .

If you only have to do this once, you don't have to define a function.

The code sample achieves the same result without using a reusable function.

The values on the left and right-hand sides of the addition (+) operator have to all be tuples.

The syntax for tuple slicing is my_tuple[start:stop:step] .

The start index is inclusive and the stop index is exclusive (up to, but not including).

If the start index is omitted, it is considered to be 0 , if the stop index is omitted, the slice goes to the end of the tuple.

# Using a list instead of a tuple

Alternatively, you can declare a list from the beginning by wrapping the elements in square brackets (not parentheses).

Declaring a list from the beginning is much more efficient if you have to change the values in the collection often.

Tuples are intended to store values that never change.

# How tuples are constructed in Python

In case you declared a tuple by mistake, tuples are constructed in multiple ways:

• Using a pair of parentheses () creates an empty tuple
• Using a trailing comma - a, or (a,)
• Separating items with commas - a, b or (a, b)
• Using the tuple() constructor

# Checking if the value is a tuple

You can also handle the error by checking if the value is a tuple before the assignment.

If the variable stores a tuple, we set it to a list to be able to update the value at the specified index.

The isinstance() function returns True if the passed-in object is an instance or a subclass of the passed-in class.

If you aren't sure what type a variable stores, use the built-in type() class.

The type class returns the type of an object.

# Additional Resources

You can learn more about the related topics by checking out the following tutorials:

• How to convert a Tuple to an Integer in Python
• How to convert a Tuple to JSON in Python
• Find Min and Max values in Tuple or List of Tuples in Python
• Get the Nth element of a Tuple or List of Tuples in Python
• Creating a Tuple or a Set from user Input in Python
• How to Iterate through a List of Tuples in Python
• Write a List of Tuples to a File in Python
• AttributeError: 'tuple' object has no attribute X in Python
• TypeError: 'tuple' object is not callable in Python [Fixed]

Borislav Hadzhiev

Web Developer

Copyright © 2024 Borislav Hadzhiev

How to Solve Python TypeError: ‘set’ object does not support item assignment

by Suf | Programming , Python , Tips

In Python, you cannot access the elements of sets using indexing. If you try to change a set in place using the indexing operator [], you will raise the TypeError: ‘set’ object does not support item assignment.

This error can occur when incorrectly defining a dictionary without colons separating the keys and values.

If you intend to use a set, you can convert the set to a list, perform an index assignment then convert the list back to a tuple.

This tutorial will go through how to solve this error and solve it with the help of code examples.

Table of contents

Typeerror: ‘set’ object does not support item assignment.

Let’s break up the error message to understand what the error means. TypeError occurs whenever you attempt to use an illegal operation for a specific data type.

The part 'set' object tells us that the error concerns an illegal operation for sets.

The part does not support item assignment tells us that item assignment is the illegal operation we are attempting.

Sets are unordered objects which do not support indexing. You must use indexable container objects like lists to perform item assignment

Example #1: Assigning Items to Set

Let’s look at an example where we have a set of numbers and we want to replace the number 10 with the number 6 in the set using indexing.

Let’s run the code to see the result:

We throw the TypeError because the set object is indexable.

To solve this error, we need to convert the set to a list then perform the item assignment. We will then convert the list back to a set. However, you can leave the object as a list if you do not need a set. Let’s convert the list using the list() method:

The number 10 is the last element in the list. We can access this element using the indexing operator with the index -1 . Let’s look at the item assignment and the conversion back to a set:

Let’s run the code to get the result:

We successfully replaced the number 10 using item assignment.

Example #2: Incorrectly Defining a Dictionary

The error can also occur when we try to create a dictionary but fail to use colons between the keys and the values. Let’s look at the difference between a set and a dictionary creation. In this example, want to create a dictionary where the keys are countries and the values are the capital city of each country:

We see that we set the capital of Switzerland set incorrectly to Zurich instead of Geneva . Let’s try to change the value of Switzerland using indexing:

We throw the error because we defined a set and not a dictionary. Let’s print the type of the capitals object:

We cannot index sets and therefore cannot perform item assignments.

To solve this error, we need to define a dictionary instead. The correct way to define a dictionary is to use curly brackets {} with each key-value pair having a colon between them. We will also verify the type of the object using a print statement:

Now we have a dictionary we can perform the item assignment to correct the capital city of Switzerland. Let’s look at the code:

Let’s run the code to see what happens:

We correctly updated the dictionary.

Congratulations on reading to the end of this tutorial. The TypeError: ‘set’ object does not support item assignment occurs when you try to change the elements of a set using indexing. The set data type is not indexable. To perform item assignment you should convert the set to a list, perform the item assignment then convert the list back to a set.

However, if you want to create a dictionary ensure that a colon is between every key and value and that a comma is separating each key-value pair.

For further reading on TypeErrors, go to the articles:

• How to Solve Python TypeError: ‘str’ object does not support item assignment
• How to Solve Python TypeError: ‘tuple’ object does not support item assignment
• How to Solve Python TypeError: ‘int’ object does not support item assignment

To learn more about Python for data science and machine learning, go to the  online courses page on Python  for the most comprehensive courses available.

Have fun and happy researching!

Share this:

• Click to share on Facebook (Opens in new window)
• Click to share on LinkedIn (Opens in new window)
• Click to share on Reddit (Opens in new window)
• Click to share on Pinterest (Opens in new window)
• Click to share on Telegram (Opens in new window)
• Click to share on WhatsApp (Opens in new window)
• Click to share on Twitter (Opens in new window)
• Click to share on Tumblr (Opens in new window)

TypeError: 'src' object does not support item assignment

The assignment str[i] = str[j] is working inconsistently. Please refer to the screenshots and let me know if I am missing something.

We are receiving TypeError: ‘src’ object does not support item assignment

Regards, Praveen. Thank you!

Please don’t use screenshots. Show the code and the traceback as text.

Strings are immutable. You can’t modify a string by trying to change a character within.

You can create a new string with the bits before, the bits after, and whatever you want in between.

Yeah, you cannot assign a string to a variable, and then modify the string, but you can use the string to create a new one and assign that result to the same variable. Borrowing some code from @BowlOfRed above, you can do this:

Related Topics

Navigation Menu

Search code, repositories, users, issues, pull requests..., provide feedback.

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly.

To see all available qualifiers, see our documentation .

• Notifications

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement . We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

TypeError: 'Request' object does not support item assignment #37

alexjolig commented Nov 4, 2021

Sorry, something went wrong.

JonasKs commented Nov 4, 2021 • edited

• 👍 1 reaction

alexjolig commented Nov 5, 2021

Jonasks commented nov 5, 2021.

No branches or pull requests