Defining a Keyword
In programming, keywords are the "reserved words" of the language, which convey special meaning to the interpreter. It can be a command or a parameter. Keywords cannot be used as variable names in program fragments. Keywords in Python: The Python language also reserves some keywords that convey special meaning. This knowledge is a necessary part of learning this language. The following is a list of keywords registered by python.
In Python, keywords are predefined reserved words that have specific meanings and cannot be used as variable names or identifiers. Python has a total of 35 keywords, and it is essential to know if a given string is a valid keyword or not.
Here's a Python program to check if a string is a valid keyword or not:
import keyword def is_valid_keyword(string): if keyword.iskeyword(string): print(f"{string} is a valid keyword") else: print(f"{string} is not a valid keyword") # example usage is_valid_keyword("if") # output: if is a valid keyword is_valid_keyword("hello") # output: hello is not a valid keyword
The program uses the keyword
module in Python, which provides a function iskeyword()
to check if a given string is a valid keyword or not.
The is_valid_keyword()
function takes a string as input and checks if it is a valid keyword or not using the iskeyword()
function. If the string is a valid keyword, it prints a message saying so, and if not, it prints a message saying that the string is not a valid keyword.
In the example usage, we pass two strings "if" and "hello" to the is_valid_keyword()
function. The first string "if" is a valid keyword, so the function outputs "if is a valid keyword". The second string "hello" is not a valid keyword, so the function outputs "hello is not a valid keyword".