Typeerror: ‘<' not supported between instances of 'str' and 'int' with solutions in Python

When working with Python, the Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’ will appear easily if you don’t work carefully. Luckily, however, this error can be avoided quickly with several simple methods. Which are they? Then, ArrowHiTech will suggest them for you through this article below.

What is Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’? 

First of all, you should know about the strings and integers. In fact, comparison operators cannot be used to compare them. This is due to strings and integers being two distinct data types. 

What’s more, as you probably know, the Python programming language is a great example for statically typed language. As a result, if you need to compare a value of one type to another, you must manually modify the type of the data.

Typeerror < not supported between instances of str and int
Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’

Now, let’s consider the case that you need to convert a string to an integer. Specifically, in order that the comparison can work, you must manually convert the string to an integer.

In terms of Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’, this error will appear as soon as you attempt to do a “greater than” comparison on a string and an integer. 

Unfortunately, you must be careful with Python because the Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’ will appear extremely easily. Then, take note that any comparison operation, such as less than (), less than or equal to (=), or greater than or equal to (>=), can be the cause of this error.

Now, let’s take a look at the illustrated examples to know exactly when this Typeerror shows. 

Illustrated examples of the Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’

Now, we create a program that calculates a student’s letter grade on a test to give you an instance:

To begin, request that a user enter a numerical grade, which we will later convert to a letter grade using an input() statement like below:

numerical_grade = input(“What grade did the student earn? “)

Then, in order to determine the numerical grade of students, you need to take advantage of an “if” statement. So, let’s refer to following codes:

Examples of the Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’

if numerical_grade > 80:

letter = “A”

elif numerical_grade > 70:

letter = “B”

elif numerical_grade > 60:

letter = “C”

elif numerical_grade > 50:

letter = “D”

else:

letter = “F”

print(letter)

In this case, the numerical grade variable is compared to a set of numbers in this code. First of all, our code first will calculate whether the numerical grade is more than 80. If that’s the case, the value of “letter” becomes “A”. However, if not, our code will check the next “elif” statement.

Python programming language
Python programming language

In addition, our code sets the value of “letter” to “F” if all of the “if” and “elif” lines evaluate to False. After that, we publish the letter grade a pupil has achieved to the console at the end of our program.

Now, you should apply the codes below and will surprise with its output:

What grade did the student earn? 64

Traceback (most recent call last):

  File “main.py”, line 3, in <module>

if numerical_grade > 80:

Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’

As you can see, in this case, the code doesn’t execute properly. Our program requires us to enter a student’s grade. When our code attempts to perform its initial comparison, it will surely encounter an error.

How to solve Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’ quickly? 

In reality, the string is returned by the input() method. Then, this suggests that our code is attempting to convert a string (the value in “numerical grade”) to an integer. 

Then, before we perform any comparisons in our code, we change “numerical grade” to an integer to solve this problem. To dig down further information, let’s explore the code below:

numerical_grade = int(input(“What grade did the student earn? “))

Moreover, the int() method turns the value entered by the user into an integer. Then, why don’t you exploring our following codes:

What grade did the student earn? 64

C

The method to fix Typeerror < not supported between instances of str and int
Method to fix Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’

As you can see through the code above, the Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’ is fixed perfectly. This is due to the fact that we are now comparing two integer values rather than an integer and a string.

In conclusion of Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’

In brief, whether Python or any other programming language, in case you don’t work carefully, you will easily encounter unnecessary errors. Through this article, ArrowHiTech believes when accidentally facing Typeerror: ‘<‘ not supported between instances of ‘str’ and ‘int’, you can solve it simply if you follow our instructions. 

Is this article useful for you or not? Also, if you have any better solution to fix this Typeerror, let’s ArrowHiTech know, and we will improve our blog to become more and more beneficial for everyone. All in all, if you consider the area of technology, you can refer to our services here.  

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