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First Python Program. Let us execute programs in different modes of programming.

Python Identifiers. A Python identifier is a name used to identify a variable, function, class, module or other object.

Reserved Words.

Lines and Indentation.

Multi-Line Statements.

Quotation in Python.

Comments in Python.

Using Blank Lines.

Sequences

Tuples are like lists, but they are immutable - they can't be changed.

Strings are a special type of sequence that can only store characters, and they have a special notation.

Python 3.2 Documentation.

File Handling

Python too supports file handling and allows users to handle files i.e., to read and write files, along with many other file handling options, to operate on files. The concept of file handling has stretched over various other languages, but the implementation is either complicated or lengthy, but alike other concepts of Python, this concept here is also easy and short. Python treats file differently as text or binary and this is important. Each line of code includes a sequence of characters and they form text file. Each line of a file is terminated with a special character, called the EOL or End of Line characters like comma {,} or newline character. It ends the current line and tells the interpreter a new one has begun. Let’s start with Reading and Writing files.

Exception Handling

In Python, exceptions can be handled using a try statement. A critical operation which can raise exception is placed inside the try clause and the code that handles exception is written in except clause.

Object Oriented programming with Python

Object-oriented programming (OOP) is a powerful programming paradigm that reduces the complexity of systems as is employs heavy re-usability of code. OOP leverages the concept of objects and classes. Objects may contain data (known as attributes, stored as instance or class variables) as well as procedures (defined as methods). Objects are generated from blueprints known as classes, which specify the attributes and methods to be generated at the time of object instantiation. This course introduces the internals of classes and the utilization of objects, as well as important object-oriented programming fundamentals such as inheritance, polymorphism, and composition.

Modules

A module is a Python object with arbitrarily named attributes that you can bind and reference. Simply, a module is a file consisting of Python code. A module can define functions, classes and variables.

Packages

Packages are namespaces which contain multiple packages and modules themselves. They are simply directories, but with a twist. Each package in Python is a directory which MUST contain a special file called __init__.py .

Database Handling

The DBMS is a software system that enables you to create, store, modify, retrieve, and otherwise handle data from a database. Such systems also vary in size, ranging from small systems that simply run on your personal computer to larger ones running on mainframes.

GUI Programming

A graphical user interface builder (or GUI builder), also known as GUI designer, is a software development tool that simplifies the creation of GUIs by allowing the designer to arrange graphical control elements (often called widgets) using a drag-and-drop WYSIWYG editor.

Django – Web framework

Django is a Python based full stack web development framework means it is used to develop full fledged websites in Python. it encourages rapid development and advocates pragmatic and clean code.

Drawing Graphics – Turtles

“Turtle” is a python feature like a drawing board, which lets you command a turtle to draw all over it! You can use functions like turtle.forward(...) and turtle.left(...) which can move the turtle around. Before you can use turtle, you have to import it.