Python program to check if a given string is Keyword or not

Difficulty Level : Easy
Last Updated : 07 Feb, 2019

Given a string, write a Python program that checks if the given string is keyword or not.

Keywords are reserved words which cannot be used as variable names.
There are 33 keywords in Python programming language.(in python 3.6.2 version)

Examples:

Input: str = "geeks"
Output: geeks is not a keyword

Input: str = "for"
Output: for is a keyword

We can always get the list of keywords in the current Python version using kwlist method in keyword module.

# import keyword library
import keyword
  
keyword_list = keyword.kwlist
print("No. of keywords present in current version :",
                                   len(keyword_list))
  
print(keyword_list)

Output:

No. of keywords present in current version : 33
[‘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’]

Below is the Python code to check if a given string is Keyword or not:

# include keyword library in this program
import keyword
  
# Function to check whether the given 
# string is a keyword or not 
def isKeyword(word) :
  
    # kwlist attribute of keyword
    # library return list of keywords
    # present in current version of
    # python language.
    keyword_list = keyword.kwlist
  
    # check word in present in
    # keyword_list or not.
    if word in keyword_list :
        return "Yes"
    else :
        return "No"
  
  
# Driver Code
if __name__ == "__main__" :
  
    print(isKeyword("geeks"))
    print(isKeyword("for"))

Output:

No
Yes

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Python program to check if a given string is Keyword or not