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Check whether the given string is a keyword or not using keyword module

Python keyword module example: Here, we are going to learn how to check whether the given string is a keyword or not using keyword module in Python?
Submitted by Bipin Kumar, on November 01, 2019

In this program, a string will be given by the user and we have to check whether it is a keyword in Python or not. To do this task in Python we will use a module which name is the keyword. Before going to do this task we will see a program that will return all keywords of Python programming language.

Python program to print all keyword

# importing the module
import keyword

# getting the list of all keywords
List_of_key=keyword.kwlist

# printing the number of keywords
print("No of keyword in Python: ",len(List_of_key))

#To print lists of all keyword present in Python.
print("List of keyword:",List_of_key)

Output

No of keyword in Python:  33
List of keyword: ['False', 'None', 'True', 'and', 'as', 'assert', 'break', 
'class', 'continue', 'def', 'del', 'elif', 'else','except', 'finally', 'for', 
'from', 'global', 'if', 'import', 'in', 'is', 'lambda', 'nonlocal', 'not', 'or', 
'pass', 'raise','return', 'try', 'while', 'with', 'yield']

Note:

• Here, we have seen that the total keyword in Python language is 33.
• Python does not allow us to use the keyword as a variable in the program.

Algorithm to check given string is a keyword or not?

1. Initially, we will include the keyword module in Python by using the import function.
2. Take the input string from the user.
3. Take a list of all keyword in a variable by using kwlist() function from the module keyword.
4. Check the given string is lies in the above-created list or not by using the keyword of Python.
   1. If it lies in the list then print the given string is a keyword in the Python programming language.
   2. If it does not lie in the list then print the given string is not a keyword in the Python programming language.

So, let's start writing the python program by the implementation of the above algorithm,

Python program to check whether given string is a keyword or not

# importing the module
import keyword

# input a string
str=input("Enter a string: ")

# getting a list of all keywords
List_of_key=keyword.kwlist

# checking whether given string is a keyword or not
if str in List_of_key:
    print("String {} is a keyword.".format(str))
else:
    print("String {} is not a keyword.".format(str))

Output

RUN 1:
Enter a string: includehelp
String includehelp is not a keyword.

RUN 2:
Enter a string: try
String try is a keyword.

RUN 3:
Enter a string: nonlocal
String nonlocal is a keyword.