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The error “TypeError: ‘function’ object is not subscriptable” occurs when you try to access an item from a function. Functions cannot be indexed using square brackets. To solve this error, ensure functions have different names to variables. Always call a function before attempting to access the functions.Python throws the TypeError object is not subscriptable if you use indexing with the square bracket notation on an object that is not indexable. This is the case if the object doesn’t define the __getitem__() method.TypeError: ‘NoneType’ object is not subscriptable Solution

The best way to resolve this issue is by not assigning the sort() method to any variable and leaving the numbers. sort() as is.

Table of Contents

What does it mean when an object is not Subscriptable?

Python throws the TypeError object is not subscriptable if you use indexing with the square bracket notation on an object that is not indexable. This is the case if the object doesn’t define the __getitem__() method.

How do I fix NoneType object is not Subscriptable in Python?

TypeError: ‘NoneType’ object is not subscriptable Solution

The best way to resolve this issue is by not assigning the sort() method to any variable and leaving the numbers. sort() as is.

How do you fix float objects are not Subscriptable?

The error “TypeError: ‘float’ object is not subscriptable” occurs when you try to access a floating-point number like a list. To solve this error, ensure you only use indexing or slicing syntax on a subscriptable object, like a list or a string.

What does Builtin_function_or_method object is not Subscriptable mean in Python?

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.

What objects are Subscriptable?

In simple words, objects which can be subscripted are called sub scriptable objects. In Python, strings, lists, tuples, and dictionaries fall in subscriptable category.

What is meant by Subscriptable in Python?

Some objects in Python are subscriptable. This means that they contain, or can contain, other objects. Integers are not a subscriptable object. They are used to store whole numbers. If you treat an integer like a subscriptable object, an error will be raised.

How do I fix NoneType errors in Python?

The error “TypeError: ‘NoneType’ object is not iterable” occurs when you try to iterate over a NoneType object. Objects like list, tuple, and string are iterables, but not None. To solve this error, ensure you assign any values you want to iterate over to an iterable object.

What is a NoneType object?

NoneType is the type for the None object, which is an object that indicates no value. None is the return value of functions that “don’t return anything”.

How do you test for NoneType?

To check whether a variable is None or not, use the is operator in Python. With the is operator, use the syntax object is None to return True if the object has the type NoneType and False otherwise.

How do you make an int object Subscriptable?

The TypeError: ‘int’ object is not subscriptable error occurs if we try to index or slice the integer as if it is a subscriptable object like list, dict, or string objects. The issue can be resolved by removing any indexing or slicing to access the values of the integer object.

How do you fix TypeError list indices must be integers or slices not float?

The Python “TypeError: list indices must be integers or slices, not float” occurs when we use a floating-point number to access a list at a specific index. To solve the error, convert the float to an integer, e.g. my_list[int(my_float)] .

What does type object is not Subscriptable mean in Python?

The “TypeError: ‘type’ object is not subscriptable” error is raised when you try to access an object using indexing whose data type is “type”. To solve this error, ensure you only try to access iterable objects, like tuples and strings, using indexing.

What is a builtin_function_or_method?

This usually happens when a function or any operation is applied against an incorrect object. In such a situation, you are likely to encounter an error called typeerror ‘builtin_function_or_method’ object is not subscriptable.

What is type builtin_function_or_method?

The python error TypeError: object of type ‘builtin_function_or_method’ has no len() occurs while attempting to find the length of an object that returns a build in function or a method. The python variables can have a reference of a build in function or a method.

What is NoneType object is not Subscriptable?

The error, NoneType object is not subscriptable, means that you were trying to subscript a NoneType object. This resulted in a type error. ‘NoneType’ object is not subscriptable is the one thrown by python when you use the square bracket notation object[key] where an object doesn’t define the __getitem__ method.

What does type object is not Subscriptable mean in Python?

The “TypeError: ‘type’ object is not subscriptable” error is raised when you try to access an object using indexing whose data type is “type”. To solve this error, ensure you only try to access iterable objects, like tuples and strings, using indexing.

What is NoneType object is not Subscriptable?

The error, NoneType object is not subscriptable, means that you were trying to subscript a NoneType object. This resulted in a type error. ‘NoneType’ object is not subscriptable is the one thrown by python when you use the square bracket notation object[key] where an object doesn’t define the __getitem__ method.

Are sets Subscriptable Python?

In Python, you cannot access values inside a set using indexing syntax. A set is an unordered collection of unique elements. Because a set is unordered, they do not record element position or insertion order.


How To Fix Type Error: Type Object is not Subscriptable
How To Fix Type Error: Type Object is not Subscriptable


How to Solve Python TypeError: ‘function’ object is not subscriptable – The Research Scientist Pod

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Table of contents

TypeError ‘function’ object is not subscriptable

Example #1 Calling a Function Using Square Brackets

Example #2 Function has the Same Name as a Subscriptable object

Summary

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TypeError ‘function’ object is not subscriptable

Scenario #1 Function with Same Name as an Iterable

Scenario #2 Accessing a Function Using Indexing

Conclusion

Python TypeError: ‘function’ object is not subscriptable | Career Karma
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TypeError: ‘function’ object is not subscriptable – Python – Stack Overflow

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Python TypeError: ‘NoneType’ object is not subscriptable – ItsMyCode

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What is TypeError ‘NoneType’ object is not subscriptable

TypeError ‘NoneType’ object is not subscriptable Solution

Conclusion

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How to Solve Python TypeError: ‘float’ object is not subscriptable – The Research Scientist Pod

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TypeError ‘float’ object is not subscriptable

Example #1 Accessing an Item from a Float

Example #2 Replacing Multiple Items in a List

Summary

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How to Solve Python TypeError: ‘float’ object is not subscriptable – The Research Scientist Pod

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Python TypeError: ‘builtin_function_or_method’ object is not subscriptable

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TypeError ‘builtin_function_or_method’ object is not subscriptable

An Example Scenario

The Solution

Conclusion

Python TypeError: ‘builtin_function_or_method’ object is not subscriptable
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Python TypeError: ‘function’ object is not subscriptable Solution

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typeerror: function object is not subscriptable ( Easy ways to Fix )

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How to Solve Python TypeError: ‘function’ object is not subscriptable

In Python, a function is a block of code that only runs when called. You can pass data, known as parameters or arguments, to a function, and a function can return data as a result. To call a function, you must use the function name followed by parentheses () and pass the arguments inside the parentheses separated by commas. If you try to call a function using square brackets [] instead of parentheses, you will raise the error: “TypeError: ‘function’ object is not subscriptable”.

This tutorial will go through the error in detail. We will go through two example scenarios of this error and learn to solve it.

TypeError: ‘function’ object is not subscriptable

What is a TypeError?

A TypeError occurs when you perform an illegal operation for a specific data type.

What Does Subscriptable Mean?

The subscript operator, which is square brackets [] , retrieves items from subscriptable objects like lists or tuples. The operator in fact calls the __getitem__ method, for example, a[i] is equivalent to a.__getitem__(i) .

All subscriptable objects have a __getitem__ method. Functions do not contain items and do not have a __getitem__ method. We can verify that functions objects do not have the __getitem__ method by defining a function and passing it to the dir() method:

def add(a, b): result = a + b return result print(type(add)) print(dir(add))

[‘__annotations__’, ‘__call__’, ‘__class__’, ‘__closure__’, ‘__code__’, ‘__defaults__’, ‘__delattr__’, ‘__dict__’, ‘__dir__’, ‘__doc__’, ‘__eq__’, ‘__format__’, ‘__ge__’, ‘__get__’, ‘__getattribute__’, ‘__globals__’, ‘__gt__’, ‘__hash__’, ‘__init__’, ‘__init_subclass__’, ‘__kwdefaults__’, ‘__le__’, ‘__lt__’, ‘__module__’, ‘__name__’, ‘__ne__’, ‘__new__’, ‘__qualname__’, ‘__reduce__’, ‘__reduce_ex__’, ‘__repr__’, ‘__setattr__’, ‘__sizeof__’, ‘__str__’, ‘__subclasshook__’]

Let’s look at an example of accessing an item from a list:

numbers = [0, 1, 2, 3, 4] print(numbers[2])

2

The value at the index position 2 is 2. Therefore, the code returns 2.

Functions are not subscriptable. Therefore, you cannot use square syntax to access the items in a function or to call a function, and functions can only return a subscriptable object if we call them.

The error “TypeError: ‘function’ object is not subscriptable” occurs when you try to access a function as if it were a subscriptable object. There are two common mistakes made in code that can raise this error.

Calling a function using square brackets

Assigning a function the same name as a subscriptable object

Example #1: Calling a Function Using Square Brackets

You can call a function using parentheses after the function name, and indexing uses square brackets after the list, tuple, or string name. If we put the indexing syntax after a function name, the Python interpreter will try to perform the indexing operation on the function. Function objects do not support the indexing operation, and therefore the interpreter will throw the error.

Let’s look at an example of creating a function that takes two integers as arguments and raises the first integer to the power of the second integer using the exponentiation operator ** . First, you define the exponent function, then define two integer values to pass to the function. Then you will print the result of the exponent function.

# Exponent function def exponent(a, b): return a ** b a = 4 b = 3 print(f'{a} raised to the power of {b} is: {exponent[a, b]}’)

————————————————————————— TypeError Traceback (most recent call last) Input In [2], in () 7 a = 4 9 b = 3 —> 11 print(f'{a} raised to the power of {b} is: {exponent[a, b]}’) TypeError: ‘function’ object is not subscriptable

The code did not run because you tried to call the exponent function using square brackets.

Solution

You need to replace the square brackets after the exponent name with parentheses to solve the problem.

# Exponent function def exponent(a, b): return a ** b a = 4 b = 3 print(f'{a} raised to the power of {b} is: {exponent(a, b)}’)

4 raised to the power of 3 is: 64

The code runs successfully with the correct syntax to call a function in place.

Example #2: Function has the Same Name as a Subscriptable object

You may encounter this TypeError if you define a subscriptable object with the same name as a function. Let’s look at an example where we define a dictionary containing information about the fundamental physical particle, the muon.

particle = { “name”:”Muon”, “charge”:-1, “spin”:1/2, “mass”:105.7 }

Next, we are going to define a function that prints out the values of the dictionary to the console:

def particle(p): print(f’Particle Name: {p[“name”]}’) print(f’Particle Charge: {p[“charge”]}’) print(f’Particle Spin: {p[“spin”]}’) print(f’Particle Mass: {p[“mass”]}’)

Next, we will call the particle function and pass the particle dictionary as a parameter:

particle(particle)

————————————————————————— TypeError Traceback (most recent call last) Input In [5], in () —-> 1 particle(particle) Input In [4], in particle(p) 1 def particle(p): —-> 3 print(f’Particle Name: {p[“name”]}’) 5 print(f’Particle Charge: {p[“charge”]}’) 7 print(f’Particle Spin: {p[“spin”]}’) TypeError: ‘function’ object is not subscriptable

We raise this error because we have a function and a subscriptable object with the same name. We first declare “ particle ” as a dictionary, and then we define a function with the same name, which makes “ particle ” a function rather than a dictionary. Therefore, when we pass “ particle ” as a parameter to the particle() function, we are passing the function with the name “ particle “. Square brackets are used within the code block to access items in the dictionary, but this is done on the function instead.

Solution

To solve this problem, we can change the name of the function. It is good to change the function name to describe what the function does. In this case, we will rename the function to show_particle_details() .

particle = { “name”:”Muon”, “charge”:-1, “spin”:1/2, “mass”:105.7 }

def show_particle_details(p): print(f’Particle Name: {p[“name”]}’) print(f’Particle Charge: {p[“charge”]}’) print(f’Particle Spin: {p[“spin”]}’) print(f’Particle Mass: {p[“mass”]}’)

Let’s see what happens when we try to run the code:

show_particle_details(particle)

Particle Name: Muon Particle Charge: -1 Particle Spin: 0.5 Particle Mass: 105.7

The code runs successfully and prints out the particle information to the console.

Summary

Congratulations on reading to the end of this tutorial. The error “TypeError: ‘function’ object is not subscriptable” occurs when you try to access an item from a function. Functions cannot be indexed using square brackets.

To solve this error, ensure functions have different names to variables. Always call a function before attempting to access the functions. When you call a function using parentheses and not square brackets, the function returns.

For further reading on TypeErrors, go to the articles:

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Python TypeError: ‘function’ object is not subscriptable Solution

Unlike iterable objects, you cannot access a value from a function using indexing syntax.

Even if a function returns an iterable, you must assign the response from a function to a variable before accessing its values. Otherwise, you encounter an “TypeError: ‘function’ object is not subscriptable” error.

In this guide, we talk about what this error means. We walk through two examples of this error so you can figure out how to solve it in your code.

TypeError: ‘function’ object is not subscriptable

Iterable objects such as lists and strings can be accessed using indexing notation. This lets you access an individual item, or range of items, from an iterable.

Consider the following code:

grades = [“A”, “A”, “B”] print(grades[0])

The value at the index position 0 is A. Thus, our code returns “A”. This syntax does not work on a function. This is because a function is not an iterable object. Functions are only capable of returning an iterable object if they are called.

The “TypeError: ‘function’ object is not subscriptable” error occurs when you try to access a function as if it were an iterable object.

This error is common in two scenarios:

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When you assign a function the same name as an iterable

When you try to access the values from a function as if the function were iterable

Let’s analyze both of these scenarios.

Scenario #1: Function with Same Name as an Iterable

Create a program that prints out information about a student at a school. We start by defining a dictionary with information on a student and their latest test score:

student = { “name”: “Holly”, “latest_test_score”: “B”, “class”: “Sixth Grade” }

Our dictionary contains three keys and three values. One key represents the name of a student; one key represents the score a student earned on their latest test; one key represents the class a student is in.

Next, we’re going to define a function that prints out these values to the console:

def student(pupil): print(“Name: ” + pupil[“name”]) print(“Latest Test Score: ” + pupil[“latest_test_score”]) print(“Class: ” + pupil[“class”])

Our code prints out the three values in the “pupil” dictionary to the console. The “pupil” dictionary is passed as an argument into the student() function.

Let’s call our function and pass the “student” dictionary as a parameter:

student(student)

Our Python code throws an error:

[fasttrack_express_form]

Traceback (most recent call last): File “main.py”, line 8, in student(student) File “main.py”, line 4, in student print(“Name: ” + pupil[“name”]) TypeError: ‘function’ object is not subscriptable

This error is caused because we have a function and an iterable with the same name. “student” is first declared as a dictionary. We then define a function with the same name. This makes “student” a function rather than a dictionary.

When we pass “student” as a parameter into the student() function, we are passing the function with the name “student”.

We solve this problem by renaming our student function:

def show_student_details(pupil): print(“Name: ” + pupil[“name”]) print(“Latest Test Score: ” + pupil[“latest_test_score”]) print(“Class: ” + pupil[“class”]) show_student_details(student)

We have renamed our function to “show_student_details”. Let’s run our code and see what happens:

Name: Holly Latest Test Score: B Class: Sixth Grade

Our code successfully prints out information about our student to the console.

Scenario #2: Accessing a Function Using Indexing

Write a program that filters a list of student records and only shows the ones where a student has earned an A grade on their latest test.

We’ll start by defining an array of students:

students = [ { “name”: “Holly”, “grade”: “B” }, { “name”: “Samantha”, “grade”: “A” }, { “name”: “Ian”, “grade”: “A” } ]

Our list of students contains three dictionaries. Each dictionary contains the name of a student and the grade they earned on their most recent test.

Next, define a function that returns a list of students who earned an A grade:

def get_a_grade_students(pupils): a_grade_students = [] for p in pupils: if p[“grade”] == “A”: a_grade_students.append(p) print(a_grade_students) return a_grade_students

The function accepts a list of students called “pupils”. Our function iterates over that list using a for loop. If a particular student has earned an “A” grade, their record is added to the “a_grade_students” list. Otherwise, nothing happens.

Once all students have been searched, our code prints a list of the students who earned an “A” grade and returns that list to the main program.

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We want to retrieve the first student who earned an “A” grade. To do this, we call our function and use indexing syntax to retrieve the first student’s record:

first = get_a_grade_students[0] print(first)

Run our code:

Traceback (most recent call last): File “main.py”, line 16, in first = get_a_grade_students[0] TypeError: ‘function’ object is not subscriptable

Our code returns an error. We’re trying to access a value from the “get_a_grade_students” function without first calling the function.

To solve this problem, we should call our function before we try to retrieve values from it:

a_grades = get_a_grade_students(students) first = a_grades[0] print(first)

First, we call our get_a_grade_students() function and specify our list of students as a parameter. Next, we use indexing to retrieve the record at the index position 0 from the list that the get_a_grade_students() function returns. Finally, we print that record to the console.

Let’s execute our code:

[{‘name’: ‘Samantha’, ‘grade’: ‘A’}, {‘name’: ‘Ian’, ‘grade’: ‘A’}] {‘name’: ‘Samantha’, ‘grade’: ‘A’}

Our code first prints out a list of all students who earned an “A” grade. Next, our code prints out the first student in the list who earned an “A” grade. That student was Samantha in this case.

Conclusion

The “TypeError: ‘function’ object is not subscriptable” error is raised when you try to access an item from a function as if the function were an iterable object, like a string or a list.

To solve this error, first make sure that you do not override any variables that store values by declaring a function after you declare the variable. Next, make sure that you call a function first before you try to access the values it returns.

Now you’re ready to solve this common Python error like a professional coder!

Python TypeError: Object is Not Subscriptable (How to Fix This Stupid Bug) – Finxter

4.2/5 – (5 votes)

Do you encounter this stupid error?

You’re not alone—thousands of coders like you generate this error in thousands of projects every single month. This short tutorial will show you exactly why this error occurs, how to fix it, and how to never make the same mistake again. So, let’s get started!

Python throws the TypeError object is not subscriptable if you use indexing with the square bracket notation on an object that is not indexable. This is the case if the object doesn’t define the __getitem__() method. You can fix it by removing the indexing call or defining the __getitem__ method.

The following code snippet shows the minimal example that leads to the error:

variable = None print(variable[0]) # TypeError: ‘NoneType’ object is not subscriptable

You set the variable to the value None . The value None is not a container object, it doesn’t contain other objects. So, the code really doesn’t make any sense—which result do you expect from the indexing operation?

Exercise: Before I show you how to fix it, try to resolve the error yourself in the following interactive shell:

If you struggle with indexing in Python, have a look at the following articles on the Finxter blog—especially the third!

Related Articles:

Note that a similar problem arises if you set the variable to the integer value 42 instead of the None value. The only difference is that the error message now is “TypeError: ‘int’ object is not subscriptable” .

You can fix the non-subscriptable TypeError by wrapping the non-indexable values into a container data type such as a list in Python:

variable = [None] print(variable[0]) # None

The output now is the value None and the script doesn’t throw an error anymore.

An alternative is to define the __getitem__ method in your code:

class X: def __getitem__(self, i): return f”Value {i}” variable = X() print(variable[0]) # Value 0

You overwrite the __getitem__ method that takes one (index) argument i (in addition to the obligatory self argument) and returns the i -th value of the “container”. In our case, we just return a string “Value 0” for the element variable[0] and “Value 10” for the element variable[10] . It doesn’t make a lot of sense here but is the minimal example that shows how it works.

I hope you’d be able to fix the bug in your code! Before you go, check out our free Python cheat sheets that’ll teach you the basics in Python in minimal time:

Programming Humor – Python

“I wrote 20 short programs in Python yesterday. It was wonderful. Perl, I’m leaving you.” — xkcd

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