Dealing with Typeerror: Not Supported Between Instances Of Str and Int

The Typeerror: not supported between instances of str and int in Python, is a standard error that arises when a comparison operator is used between values of the “Str” type and “int” type. This type of comparison between two incompatible types always raises the TypeError.

This guide will help you find the causes and solutions for the Typeerror not supported between instances of str and int.

Difference between Str and Int

The “Str” and “Int” define two data types in Python. The “Str” represents the data type that can store characters. Whereas the “Int” data type stores the integers.

Usually, the “Str” data type contains non-numeric characters like alphabets, words, etc. It has more storage than the data storage for integers. Example: “Afgkj”

But in “Int” data type contains numerical data. The “Int” is always used for mathematical values. Generally, Integers are always positive whole numbers, and they are used in mathematical operations.

Since the “Int” and “Str” are two data types, they can not be used together, and if they are used, they will show the Typeerror: not supported between instances of “str” and “int”.

Solutions for Typeerror: not supported between instances of str and int

As mentioned above, the Typeerror: not supported between instances of str and int arises when the comparison operators differ. To resolve this error, the comparison operators must be the same type. So to do that, below is a list of ways you follow to convert the comparison operator into the same type and resolve the Typeerror: not supported between instances of “str” and “int”.

Converting String to an Integer

One way to resolve the Typeerror: not supported between instances of str and int is to convert the “Str” operator into the “Int” operator to make the data compatible. This can be done in two ways.

By using the “Int” class.

Syntax: –

my_str = '7'

my_int = 3

print(int(my_str) < my_int) 

if int(my_str) < my_int:

    print('my_str < my_int')

else:

    print('my_str >= my_int')

The above example will show the result as false. Since the two can be compared now.

Another way to convert “Str” into “int” is to use “float()”. This can convert the Strings to floating point numbers. The floating numbers are easier to compare with the integer as they are more compatible with the integers than the strings.

Syntax: –

my_str = '6.8'

my_int = 4

print(float(my_str) < my_int)  

The above example will show the result as false. Since the two can be compared now.

Converting Integer into a String

Similar to the conversion of strings into integers, Another way to resolve the Typeerror: not supported between instances of str and int is that integers can also be converted into Strings using the “input()” function, which can convert the integers into even numeric values.

Syntax:

from_input = input('2')

print(from_input)

print(type(from_input))  

my_int = 6

print(int(from_input) <= my_int) 

if int(from_input) <= my_int:

    print('True')

The built-in input() function will convert the strings into valid integers to help compare. But if the integer used in the program is invalid, it may raise an error. You can handle the error using the ‘try’ and ‘except’ statements.

Try:

from_input = input('2')

print(from_input)

print(type(from_input))  

my_int = 6

print(int(from_input) <= my_int)

except ValueError:

    print('Invalid integer supplied')

Using a list Comprehension

Another solution for the Typeerror: not supported between instances of str and int, is using the List Comprehension. The List comprehensions are used if a list of strings needs to be converted into integers. List Comprehension is used by performing some operation for every element and converting the current item into integers.

For example, we try to find the highest and lowest number in a list.

Syntax: –

a_list = ['11', '12', 13, '30']

new_list = [int(x) for x in a_list]

print(new_list)

print(min(new_list))

print(max(new_list))

The above code will return the list’s highest and lowest values.

FAQ

Conclusion

This guide can help you find the causes for Typeerror: not supported between instances of str and int and the probable solutions that can help you compatibly compare the “Str” and “Int” without any issues.

Reference

1. Integer
2. List Comprehension

To learn more about some common errors follow Python Clear’s errors section.