Class 11:Python Fundamentals Tokens Keywords

Tokens

A token is the smallest element of a Python script that is meaningful to the interpreter.
The following categories of tokens exist:
keywords, identifiers/variables, operators, and delimiters.

Python Keywords

Keywords are special words that are reserved and have a specific meaning. Python has a set of keywords that cannot be used as variables in programs.

All keywords in Python are case sensitive. So, we must be careful while using them in our code.

 

Note: Number of keywords may change from version to version as python is constantly improving so with the new version we may have new keywords

To know the list of keywords in your current version

>>>import keyword
>>>print(keyword.kwlist)
['False', 'None', 'True', 'and', 'as', 'assert', 'async', 'await', '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']         

It’s a long list to remember all at once. Our purpose of mentioning it here is only to give you an initial idea of the available keywords. However, we’ll cover each of them later.
we don’t need to memorize them instead we will learn to use them step by step.

One very important point to remember is that the above list may change. The language could get away with some of the old keywords and bring in new ones in future releases.

Another method know the list of keywords in your current version

>>>help()         
>>>help> keywords
 Here is a list of the Python keywords.  Enter any keyword to get more help.
 False               class               from                or
 None                continue            global              pass
 True                def                 if                  raise
 and                 del                 import              return
 as                  elif                in                  try
 assert              else                is                  while
 async               except              lambda              with
 await               finally             nonlocal            yield
 break               for                 not                 
 help> 

Note:
Only the following keywords have the first character as capital rest all the keywords are written in small case.

None
True
False

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