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TOKENS AND DATA                                                                        CHAPTER


            TYPES IN PYTHON                                                                        10                                             PYTHON CHARACTER SET

                                                                                                                                      A set of valid characters recognised by a language is called a character set. The characters used
                                                                                                                                      in the Python source program belong to the Unicode standard. The characters in Python are
                                                                                                                                      grouped into the following categories:

                                                                                                                                         Alphabet:  A to Z(uppercase), a to z (lowercase)
                                                                                                                                         Digits: 0 to 9

                                                                                                                                         Special characters (:) colon ( ) + _- * / /\ ^ & % # $ {} []! _(underscore) >< ?@ , ; etc. (white space,
                                                                                                                                         blank space, horizontal tab ( ), carriage return, New line, form feed)

                          Welcome  again,  young  girl. In                                                                            Python can process any of the ASCII and Unicode characters as data or as literals.
                          today’s  session,  you  will learn           Topics Covered                      95%
                          about  various  data  types  used  in           Python Character Set
                          Python.                                         Python Tokens                                                           PYTHON TOKENS

                                                                          Data Types                                                  A token is the smallest element of a Python program that is meaningful to the interpreter. You
                                                                          Find Data Type
                                                                          Errors in Python Programs                                   have learned about some tokens in the previous class. Now learn more about them in detail.
                                                                          Some more Programs
            Thank you,  Techie.  Will  I be                                                                                                                                    PYTHON TOKENS
            able to develop programs after
            that?



                                                                                                                                         IDENTIFIERS         KEYWORDS            CONSTANTS           OPERATORS           PUNCTUATORS
                              Yes, you will be able to create simple programs but you need regular practice

                              and more knowledge to be able to do more than that.                                                     IDENTIFIERS
                                                                                                                                      An identifier is a sequence of characters taken from the Python character set. It refers to variables,

                                                                                                                                      functions and arrays. The rules for identifiers are:
                                                                                                                                         Only letters, digits and an underscore are permitted.
                                 Techie, can you tell me what all we can do using Python?
                                                                                                                                         Must start with a letter between A to Z or between a to z or an underscore (_).

                                                                                                                                         Uppercase and lowercase are distinct because Python is a case sensitive language.
                                                                                                                                         Special characters are not allowed.
                         Python is a multi-purpose programming language. We can use it for a variety of
                         tasks. We can learn Python for machine learning and AI. In fact, Python is the best                          Some examples of valid identifiers are Myvar, myvar_1, Sum_of_the_numbers, PASS and _Sum.
                         language for machine learning and data science projects. Python is also popular for                          Some examples of invalid identifiers are False, Var^2, Var 1 and 1var.
                         website development. Let us take the next step in learning the Python programming
                         language.                                                                                                    KEYWORDS
                                                                                                                                      Keywords are the reserved words. They are predefined words. Keywords cannot be used as an
                                                                                                                                      identifier.





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