2. What about Python?
Is it Functional Programming language? (OR)
Is it Object Oriented Programming language? (OR)
Is it Scripting Language?
While developing Python, Guido Van Rossum borrowed -
Functional programming features from C Object Oriented
Programming features from C++ (Because, Java was not
developed at that time) Scripting language features from Perl,
Shell Script.
So, Python is considered as All Rounder. Python can enjoy the
benefits of all types of programming language paradigms
3. Python as All Rounder
C --> Procedural/Functional Programming Language
C++, Java --> Object Oriented Programming Languages
Perl, Shell Script ---> Scripting Languages
Every Programming language having it's own specific behaviour,
that specific pradigm benefits only they are going to get
4. Features of Python Language
Simple and easy to learn
Freeware and Open Source
High Level Programming Language
Platform Independent
Portability
Dynamically Typed
Python is both Procedure oriented and Object oriented
Interpreted
Extensible
Extensive Library
5. Features of Python Language
The code written in python is automatically compiled to byte
code and executed.
Extending python with C or C++.
Python supports lot of features such as nested code blocks,
functions, classes, modules and packages.
Python is an object-oriented programming language.
It has many built-in data types: strings, lists, tuples,
dictionaries, etc.,
It supports control statements such as if, if-else, if-eif-else,
while, iterative for, etc.,
It has functions, classes, modules and packages.
6. Features of Python Language
Simple
Easy to learn
Open source
High level language
Dynamically typed
Platform independent
Portable
Procedure and object oriented
7. Python application areas
For developing Desktop Applications
The Applications which are running on a single systems (i.e., Stand
alone applications) Eg: Simple Calculator application
For developing Web Applications
Eg: Gmail Application, Online E-commerce applications, Facebook
application, Blog applications etc.,
For Network Applications
Eg: Chatting applications, Client-Server applicataions etc.,
For Games development
For Data Analysis Applications
8. Python application areas
For Machine Learning applications
For developing Artificial Intelligence, Deep Learning,
Neural Network Applications.
For IOT
For Data Sciene
That's why Python is called as General Purpose Programming
Language.
9. GETTING STARTED WITH PYTHON
There are three ways of staring python:
Running a script written in python. -> text editor requires
Using Graphical user interface (GUI) from an Integrated
Development environment (IDE) -> GUI application
Employing an interactive approach -> command line
interpreter
10. GETTING STARTED WITH PYTHON
Once python starts, you can see the interpreter startup
message, indication version and platform.
You can also be given the python interpreter prompt,
ie., “>>>” which is also known as python chevron prompt.
The “>>>” indicates that python interpreter is waiting for
an expression or command.
The interacting environment where we are interaction
with the Python interpreter is called the console or
command shell.
11. INTERACTIVE PROMPT
The interactive prompt runs code and echoes results but it
does not save code in a file.
We cannot do the group of statements together.
The interactive prompt is perfect place to experiment with the
language
Example:
Interactive Python Console
>>> 5
5
>>> 5.5
5.5
>>> ""hello”
hello
12. IDLE USER INTERFACE
IDLE is a graphical user interface for doing Python
development, and is a standard and free part of the Python
system.
In short, IDLE is a GUI that lets you edit, run, browse, and
debug Python programs, all from a single interface.
Moreover, because IDLE is a Python program that uses the
Tkinter GUI tool kit
It runs portably on most Python platforms: MSWindows,
Xwindows (Unix, Linux), and Macs.
For many, IDLE is an easy – to – use alternative to typing
command lines, and a less problem – prone alternative to
clicking on icons.
14. Script Mode
In this mode, user types a set of statements called a program
in a file and then save the program with ‘filename.py’ as
extension.
Then the interpreter is used to execute the file contents. This
mode is convenient when the user wants to write and save
multiple lines of code, so that it can be easily modifiable and
reusable.
