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Docstrings = If we write string inside triple single quote (‘’’----‘’’) or triple double quote (“””----“””) and if these strings are written as first statements in a module, function, class or a method. Then these strings are called Documentation strings or simply Docstrings. These strings are useful to create an A.P.I documentation file from python program, An A.P.I (Application Programming Interface) documentation file is a text file or HTML file that contains the description of all features of software or product. When software is created it is the duty of programmer to create docstrings file in which they explain each and every class, Module, function etc. properly. It helps the user of the product (software) to use this smoothly. Representing Binary, Octal and Hexadecimal number. ➠In python, Binary number are represented by adding 0 (zero) B or 0 (zero) b as prefix to each binary number. Example: - 0B11001, 0b00101 etc.       ...

GARBAGE COLLECTOR  (GC) Module  =  A module is a code that can perform an specific task. >>> In Python GC (Garbage Collector) is a module that helps to remove the unwanted objects during the execution. When a program execution takes place GC generate reference count to each object. Reference count means how many times the object execute. when an object has reference count of at least 1 then GC do not removes them but when an object has reference count of 0 then GC understands that object has not any use in program and GC removes them. In the given figure A, B and C are three object. when we execute this program then Python interpreter interperate from A object to B object and then execute C after that it passed to A object. Thus, A, B and C have reference count of 1. So, GC not removes them. COMMENT Observe the given program :- The First line of the given program starts with   ‘#’. This symbol represents  comment line ...