Not supported between instances of str and int in python
In this article, you are going to learn why the type error occurs between instances of string and integer datatypes. Also, you will know what kind of error is the type error and what the methods are to resolve it.
What is a TypeError in Python
A type error, as its name suggests, is an exception that occurs in the python programming language. This error occurs in specific situations where the data type of objects in operation is inappropriate. To consider an example, when an integer is divided with a string, then an exception comes into sight. This error is caused as the data types of both the integer and string are not compatible with each other. Therefore, the interpreter of the python programming language raises a type error exception in the program. Type errors also occur while using built-in functions of python when used incorrectly.
TypeError not supported for instances of str and int
The “TypeError: not supported between instances of ‘str’ and ‘int’” will appear as output in python programming language when a comparison operator is used in between a string and an integer to compare the values of both data types. This happens due to the compatibility issue between both data types. There are several kinds of type errors between the instances of a string and integer due to the usage of different comparison operators in the python programming language. Let us see the explanation of different types of errors in detail.
TypeError: ‘<’ not supported between instances of ‘ str ’ and ‘ int ’
The type error “ TypeError: ‘ < ’ not supported between instances of ‘ str ’ and ‘ int ’ ” occurs when the comparison operator “ < ” is used in between the instances of a string and an integer for comparing them to each other.
Program to show to TypeError: ‘<’ exception
# This is program to show the " TypeError: ' < ' exception in python programming language"
# declaring a string in the python programming language.
ex_str = '55'
# declaring a variable as an integer datatype.
ex_int = 9
print(ex_str < ex_int)
Output
As shown in the above output, the program throws an exception of " TypeError " for comparing different data types, such as strings and an integer. To resolve this exception, we make sure the string is converted into integer type before printing or while printing the statement. To resolve the “ TypeError: ‘ < ’ not supported between instances of ‘ str ’ and ‘ int ’ ” exception, a program is shown in the example given below.
Program to resolve the TypeError: ‘<’ exception
# This is a program to resolve the " TypeError: ' < ' exception in the python programming language."
# we are declaring a string of value “ 55 ” in the python programming language.
ex_str = '55'
# declaring a variable as an integer datatype.
ex_int = 9
# changing the string data type to integer data type in the print statement.
print("The Output is: ")
print(int(ex_str) < ex_int)
Output
Here, we can see that the “ TypeError: ‘ < ’ not supported between instances of ‘ str ’ and ‘ int ’ ” exception is resolved by converting the string data type to integer data type while printing the comparison statement. So, when the string data type is converted to integer datatype, the comparison operator " < " works perfectly fine while comparing the given string and integer as there is no compatibility issue between the datatypes and the exception " TypeError: ' < ' not supported between instances of ' str ' and ' int ' " is resolved.
TypeError: ‘<=’ not supported between instances of ‘ str ’ and ‘ int ’
The type error “ TypeError: ‘ <= ’ not supported between instances of ‘ str ’ and ‘ int ’ ” also occurs when the comparison operator “ <= ” is used in between the instances of a string and an integer for comparing them to each other.
Program to show to TypeError: ‘<=’ exception:
# this is program to show the " TypeError: ' <= ' exception in python programming language"
# declaring a string in the python programming language.
ex_str = '55'
# declaring a variable as an integer datatype.
ex_int = 9
print(ex_str <= ex_int)
Output
As shown in the above output, the program throws an exception of " TypeError " for comparing different data types, such as strings and an integer. To resolve this exception, we make sure the string is converted into integer type before printing or while printing the statement. To resolve the " TypeError: ' <= ’ not supported between instances of ‘ str ’ and ‘ int ’ ” exception, a program is shown in the example given below.
Program to resolve the TypeError: ‘<=’ exception
# This is program to resolve the " TypeError: ' <= ' exception in python programming language"
# declaring a string in the python programming language.
ex_str = '55'
# declaring a variable as an integer datatype.
ex_int = 9
# changing the string data type to integer data type in the print statement.
print("The Output is: ")
print(int(ex_str) <= ex_int)
Output
Here, we can see that the “ TypeError: ‘ < = ' not supported between instances of ' str ' and ' int ' " exception is resolved by converting the string data type to integer data type while printing the comparison statement. So, when the string data type is converted to integer datatype, the comparison operator " <= ” works perfectly fine while comparing the given string and integer as there is no compatibility issue between the datatypes and the exception “ TypeError: ‘ <= ’ not supported between instances of ‘ str ’ and ‘ int ’ ” is resolved.
Note : The “ Type Error ” for the exception ‘ > ’ not supported between instances of ‘ str ’ and ‘ int ’ is similar to the exception ‘ < ’ not supported between instances of ‘ str ’ and ‘ int ’ and “ Type Error ” for the exception ‘ >= ’ not supported between instances of ‘ str ’ and ‘ int ’ is similar to the exception ‘ <= ’ not supported between instances of ‘ str ’ and ‘ int ’.
The remaining two comparison operators in the python programming language, i.e., equals to ( == ) and not equals to ( != ), do not generate the " not supported between instances of ‘ str ’ and ‘ int ’ ” exception as they have a direct approach of comparison.
Comparing string and integer using “ == ”
The type error “ TypeError: ‘ == ’ not supported between instances of ‘ str ’ and ‘ int ’ ” does not occur as the “ equals to ” comparison operator has a different approach when compared to the other four operators that are mentioned above. The " equals to " operator directly compares if the elements of a string equal the elements of an integer in this case. So, there is no reason to generate an exception of type " TypeError: ' == ' not supported between instances of ' str ' and ' int ' ".
Program to compare string and integer data types using “ == ”:
# This is a program to determine
# “ TypeError: ‘ == ’ not supported between instances of ‘ str ’ and ‘ int ’ ”
# exception does not occur in the python programming language."
# we are declaring a string of value “ 55 ” in the python programming language.
ex_str = '55'
# declaring a variable as an integer datatype.
ex_int = 9
# comparing the string data type and integer data type in the print statement using " == " comparison operator.
print("The Output is: ")
print(ex_str == ex_int)
Output
Here, we can see that the " equals to " comparison operator successfully compared different datatypes, i.e., string and integer, without generating any errors. Similarly, the " not equals " operator also compares the " int " and " Str " datatypes successfully without generating any errors such as " TypeError: ‘ != ’ not supported between instances of ‘ str ’ and ‘ int ’ ”. Let us see the comparison of " int " and " str " datatypes using the " not equals " comparison operator below.
Comparing string and integer using “ != ”
The type error “ TypeError: ‘ != ’ not supported between instances of ‘ str ’ and ‘ int ’ ” does not occur as the “ not equals” comparison operator has a different approach when compared to the other four operators that are mentioned above. The “ not equals " operator directly compares if the elements of a string equal the elements of an integer in this case. So, there is no possibility to generate an exception of type " TypeError: ' != ’ not supported between instances of ‘ str ’ and ‘ int ’ ”.
Program to compare string and integer data types using “ != ”
# This is a program to determine
# “ TypeError: ‘ != ’ not supported between instances of ‘ str ’ and ‘ int ’ ”
# exception does not occur in the python programming language."
# we are declaring a string of value “ 55 ” in the python programming language.
ex_str = '55'
# we are declaring a variable as an integer datatype.
ex_int = 9
# comparing the string data type and integer data type in the print statement using " != " comparison operator.
print("The Output is: ")
print(ex_str != ex_int)Output
Here, we can see that the “ not equals " comparison operator successfully compared different datatypes, i.e., string and integer, without generating any errors.
Conclusion
In this article, we have shown you the different kinds of " TypeError " and methods to resolve the " TypeError: ‘ ’ not supported between instances of ‘ str ’ and ‘ int ’ ” for four different comparison operators out of the six comparison operators in python. You have also learnt that the “ equals to ” and “ not equals ” comparison operators do not generate this kind of TypeError.