This document introduces the Python programming language. It discusses that Python is an interpreted, high-level, general-purpose and dynamic programming language that is free and open-source. It requires fewer lines of code than languages like C++ and Java. Python supports features like object-oriented, functional and procedural programming. It has a large standard library and can be used across operating systems. The document also describes IDLE as an integrated development environment for Python and covers basic Python concepts like comments, identifiers and the interactive shell.

1. Welcome to the Python
Programming Course

2. Introduction to Python
• Python is a high level, interpreted, general
purpose ,dynamic programming language.
• Conceived in late 80s and its usage began in
1989.
• It is a free and open software
• Open source software: is a kind of software in
which the source code of the software is made
public. It is a community based development.

3. • Fewer lines of code when compared to C ,C++
and JAVA.
• It Supports automatic memory management
• Has large standard library
• Can be used in any OS as the interpreter is
available for many OS- platform indepedent
• Can be used in Object oriented, Functional
programming, Procedural programming
• Reusability

4. Features of Python
• The code written python is automatically
compiled to byte code and executed.
• Can be used as Scripting language
• Uses Object oriented programming approach
• Supports features like nested code blocks,
functions, classes, modules and packages
• Has built in data types like strings, lists, tuple,
dictionaries
• No type declaration
• Python program can be extended

5. IDLE
• IDLE (Integrated Development and Learning
Environment) is an integrated development
environment (IDE) for Python.
• The Python installer for Windows contains the
IDLE module by default.
• IDLE is not available by default in Python
distributions for Linux. It needs to be installed
using the respective package managers.

6. • IDLE can be used to execute a single
statement just like Python Shell and also to
create, modify and execute Python scripts.
• IDLE provides a fully-featured text editor to
create Python scripts that includes features
like syntax highlighting, autocompletion and
smart indent. It also has a debugger with
stepping and breakpoints features.
• Anoconda jupyter notebook,spyder

7. Python - Shell (Interpreter)
• Python is an interpreter language. It means it
executes the code line by line. Python
provides a Python Shell (also known as Python
Interactive Shell) which is used to execute a
single Python command and get the result.
• Python Shell waits for the input command
from the user. As soon as the user enters the
command, it executes it and displays the
result.

8. Comments
• Comments are annotatations made by the
programmer helping other programmers
understand the code
• Python uses the hash character(#) for
comments
• # is put before the text and hence will not be
parsed by the interpreter.
• No error message will be displayed
• Does not affect the programming part

9. • >>> 3+5 addition
• This shows syntax error
• >>> 3+5 #addition commands
• No error and output displayed as 8

10. Identifiers
• It is a name given to variable, function, class,
module or other object etc
• Can begin with uppercase or lowercase letters or
an Underscore with a combination of any number
of letters, digits or underscores
• No other special characters are allowed
• Spaces are not allowed
• Python is a case sensitive language
Eg: Hello and hello different variables
• Class name starts with a uppercase letter

11. • Examples
• Valid:
MyName, My_Name , _myName
• Invalid:
My Name, 3rdYear, Your#Name

12. Thank You