Typeerror: ‘float’ object is not subscriptable: How to fix it in Python

As you may not know, Python can appear with several both simple as well as sophisticated errors. However, almost all of its errors have effective methods to fix them. And, Typeerror: float object is not subscriptable is the same. If you are unnecessarily catching up with this error, don’t worry. This is because there are two ways to resolve that correspond to two types of its causes. Which are they? Let’s explore through this blog of ArrowHiTech below! 

Typeerror: float object is not subscriptable and the cause of it

First and foremost, individual items can be retrieved from an iterable object. Then, it allows you to obtain one item from a Python list or one item from a dictionary, for example. This is due to iterable objects including a list of items. In short, we must use indexing to access these things. 

What’s more, a float object doesn’t enable you to give a specific value from it. Besides, integers and floating-point numbers are not iterable objects.

Python programming language
Python programming language

Simply speaking, the Typeerror: float object is not subscriptable will appear if you apply these curriculums below:

  • Attempting to extract a certain value from a floating-point number
  • Replacing numerous entries in a list using incorrect syntax

Now, you should refer to both two these cases to examine exactly what causes the Typeerror: float object is not subscriptable. 

Specific instances about the causes of Typeerror: float object is not subscriptable and the way to solve it 

# Scenario 1: Attempting to extract a certain value from a floating-point number

Coming to the first case, we are working on a program that determines whether a raffle ticket holder is a winner. Following that, a user is a winner if their ticket number begins with 1 and finishes with 7.

To begin, a user must be required to enter a ticket number that has to be checked. Then, let’s explore codes below:

ticket_number = float(input(“Enter a ticket number: “))

In this case, because this is a number, we changed it to a float.

After that, the first and last numbers on a ticket are then retrieved using indexing syntax. Now, let’s take a look of the following code:

first = ticket_number[0]

last = ticket_number[-1]

The cause of Typeerror float object is not subscriptable
Typeerror float object is not subscriptable

As you can see, our ticket number’s initial item is at index position 0 and the last item is at index position -1. Then, to see if a user is a winner, we utilize a “if” statement. This can be shown in the program below:

Output – Float object

if first == “1” and last == “7”:

print(“You are a winner!”)

else:

print(“You are not a winner.”)

This program is quite easy-to-understand even if you are not developers or programmers. Specifically, our “if” statement will run if the value of “first” is equal to “1” and the value of “last” is equal to “7,” informing the user that they have won. On the other hand, in case you aren’t won, our “else” sentence will execute. 

Now, let’s follow the example below to check the output:

Enter a ticket number: 23

Traceback (most recent call last):

  File “main.py”, line 3, in <module>

first = ticket_number[0]

TypeError: float object is not subscriptable

Unfortunately, if you run according to the program above, the Typeerror: float object is not subscriptable will appear. Because ticket numbers are stored as a float, this is the case. Also, individual values from a float cannot be retrieved using indexing syntax.

How to fix Typeerror: float object is not subscriptable in the first case?

In order to achieve that goal, the first line of code should be removed the float() conversion like below:

ticket_number = input(“Enter a ticket number: “)

As you probably see from this code above, a string is returned by the input() method. Then, unlike a floating-point value, we can manipulate a string via indexing. Now, let’s follow we run our code once more time:

Enter a ticket number: 23

You are not a winner.

At this time, our code runs smoothly and returns a successful result. Then, let’s put our code to the test on a winning ticket:

Enter a ticket number: 117

You are a winner!

# Scenario 2: Replacing numerous entries in a list using incorrect syntax

Coming to the second curriculum, that is another cause of Typeerror: float object is not subscriptable. To begin, you can use list slicing to replace several items in a list. Then, when you slice an iterable, you define a list of elements you want to access or edit.

Now, imagine that you are making a program that resets the cost of all the donuts in a list. In particular, we need to develop this application since a store is running a “Doughnut Day” promotion in which each donut is priced differently. So, let’s explore the following syntax:

price = input(“Enter the price of the donuts: “)

Then, we make a list of the current donut pricing that need to be changed like code below:

donuts = [2.50, 2.75, 1.80, 1.75, 2.60]

With these values, we can easily make changes to our list. Only by applying indexing, this can be accomplished. Then, let’s refer to code of float object below:

donuts[0][1][2][3][4] = [float(price)] * 5

print(donuts)

As you probably see, this code sets the value of “price” to the index locations 0, 1, 2, 3, and 4 in the “donuts” list. Besides, the value of “price” has been transformed to a floating point number.

How to fix Typeerror float object is not subscriptable
Typeerror float object is not subscriptable

After that, as soon as you finish all the above things, we let the price be encased in square brackets and multiplied by five. This generates a list of values that we may give to our list of “donuts.”

The final stage is printing the new price’s list to the console. Then, the following program will present for you:

Enter the price of the donuts: 2.50

Traceback (most recent call last):

  File “main.py”, line 3, in <module>

donuts[0][1][2][3][4] = [float(price)] * 5

TypeError: ‘float’ object is not subscriptable

The way to solve TypeError: float object is not subscriptable in the second curriculum

In this case, you can see the Typeerror: ‘float’ object is not subscriptable display. This is due to our code trying to update the values in the “donuts” list. The object at index position [0][1][2][3][4] is the target of our code. Because we only have floats in our list, this does not exist. Now, only need to utilize the slicing syntax to update our list, then this problem will be fixed instantly. Let’s follow our instruction below: 

donuts[0:5] = [float(price)] * 5

All of the entries in our list in the 0 to 5 range (exclusive of 5) can be returned through this code above. The next step is to assign the value of “price” to each value. Now, you should run our new code to see what will happen? 

Enter the price of the donuts: 2.50

[2.5, 2.5, 2.5, 2.5, 2.5]

The final line of Typeerror Float object

All in all, ArrowHiTech hopes you will take many benefits from our article and effortlessly avoid Typeerror: float object is not subscriptable. During the working process with Python, you can face some other errors such as:

With each Python error, ArrowHiTech all gives you the best solutions to fix in the quickest time. . However, if you have any questions related to Python, you contact us for a free consultation. AHT is a leading web application development company in Viet Nam. We provide services personalized in accordance with your business needs. Check out our  web applications and mobile app development service 

Tags

Share