Defining a Keyword
In programming, a keyword is a “reserved word” by the language which conveys special meaning to the interpreter. It may be a command or a parameter. Keywords cannot be used as a variable name in the program snippet.
Keywords in Python: Python language also reserves some keywords that convey special meaning. Knowledge of these is a necessary part of learning this language. Below is a list of keywords registered by python.
False, elif, lambda,
None, else, nonlocal,
True, except, not,
and, finally, or,
as, for, pass,
assert, from, raise,
break, global, return,
class, if, try,
continue, import, while
def, in, with,
del is, yield,
Python in its language defines an inbuilt module “keyword” which handles certain operations related to keywords. A function “iskeyword()” checks if a string is a keyword or not. Returns true if a string is a keyword, else returns false.
Python
# Instead of writing this massive Python code# we can also code this in a different way # Python code to demonstrate working of iskeyword() # importing "keyword" for keyword operationsimport keyword# initializing strings for testing while putting them in an arraykeys = ["for", "neveropen", "elif", "elseif", "nikhil", "assert", "shambhavi", "True", "False", "akshat", "akash", "break", "ashty", "lambda", "suman", "try", "vaishnavi"] for i in range(len(keys)): # checking which are keywords if keyword.iskeyword(keys[i]): print(keys[i] + " is python keyword") else: print(keys[i] + " is not a python keyword") |
for is python keyword neveropen is not a python keyword elif is python keyword elseif is not a python keyword nikhil is not a python keyword assert is python keyword shambhavi is not a python keyword True is not a python keyword False is not a python keyword akshat is not a python keyword akash is not a python keyword break is python keyword ashty is not a python keyword lambda is python keyword suman is not a python keyword try is python keyword vaishnavi is not a python keyword
Output:
for is a python keyword neveropen is not a python keyword elif is a python keyword elseif is not a python keyword nikhil is not a python keyword assert is a python keyword shambhavi is not a python keyword True is a python keyword False is a python keyword akshat is not a python keyword akash is not a python keyword break is a python keyword ashty is not a python keyword lambda is a python keyword suman is not a python keyword try is a python keyword vaishnavi is not a python keyword
How to print a list of all keywords
Sometimes, remembering all the keywords can be a difficult task while assigning variable names. Hence a function “kwlist()” is provided in the “keyword” module which prints all the 33 python keywords.
Python
#Python code to demonstrate working of iskeyword() # importing "keyword" for keyword operationsimport keyword # printing all keywords at once using "kwlist()"print ("The list of keywords is : ")print (keyword.kwlist) |
Output:
The list of keywords is : ['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']
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