Python for Machine Learning - CST 283 KTU Minor- Dr Binu V P

 I dentifiers Identifiers are names used to identify variables, functions, classes, modules, and other objects in Python. Rules for framing identifiers 1.Identifiers can be a combination of letters in lowercase (a to z) or uppercase (A to Z) or digits (0 to 9) or an underscore _.  Names like myClass, var_1 and print_this_to_screen , all are valid example. 2.An identifier cannot start with a digit.  1variable is invalid, but variable1 is a valid name. 3.Keywords cannot be used as identifiers. Eg: global = 1 is invalid 4.We cannot use special symbols like !, @, #, $, % etc. in our identifier. a@=0 is invalid 5.An identifier can be of any length. Things to Remember Python is a case-sensitive language. This means, variable X and x are not the same. Always give the identifiers a name that makes sense. While c = 10 is a valid name, writing count=10 would make more sense, and it would be easier to figure out what it represents when you look at your code after a long gap. Multiple words can