Introduction to the Python

PYTHON APPLICATION PROGRAMMING
17CS664
IA MARKS: 40
EXAM MARKS : 60
CREDITS: 03
By.
Ravi Kumar B N
Assistant Professor, Dept. of CSE

EASY TO READ AND SIMPLE TO IMPLEMENT.

WHAT IS PYTHON…?
• Python is an interpreted, high-level, general-purpose(designed to be
used for writing software in the widest variety of application domains)
programming language.

High level language
Expressive – More readable
Interpreted Language
Cross-platform/ Portable
Large Standard Library
Everything is object in python
open source
FEATURES

COMPILER V/S INTERPRETER
 Interpreted code istranslated to machine instructions step by step while the program is
being executed.
 Compiled code has been translated before program execution.

- Python runs virtually every major platform used today.
- As long as you have a compatible python interpreter installed, python programs will
run in exactly the same manner, irrespective of platform.
PORTABLE

- Dynamic typing –type of a variable isinterpreted at run time.
- Built-in types and tools
- Library utilities
- Third party utilities (e.g. NumPy, SciPy)
- Automatic memory management
IT'S POWERFUL

Numpy- library, support for large, multidimensional arrays and matrices,
along with a large collection of high level mathematical functions to
operate on the arrays.
Scipy- Contains modules for optimization, linear algebra signals, image
processing.

Python is an object-oriented programming language. It allows us to develop applications
using an object oriented approach. Inpython, we can easily create and use classes and
objects.
Everything is object inpython.
structure supports such concepts - polymorphism, operation overloading, and inheritance.
PYTHON IS OBJECT-ORIENTED

Downloading and installing python is free and easy.
source code is easily accessible.
OPEN SOURCE (IT'S FREE )

IDLE
IDLE (Integrated Development and Learning Environment) is an integrated development
environment (IDE) forPython.
The Python installer for Windows contains the IDLE module by default.
IDLE can be used to execute a single statement just like Python Shell and also to create,
modify and execute Python scripts.

DIFFERENT IDE AVAILABLE
 PyCharm
 Spyder
 Pydev
 IDLE
 Wing
 EricPython
 Rodeo
 Thonny
 Jupyter Notebook
 Visual Studio

WHY DO PEOPLE USE PYTHON…?
• Interms of number of developers using, number of libraries we
have, number of companies using and number of areas we can
implement it.
Fastest growing Language
• Python's syntax is easy to learn, so both non-programmers and
programmers can start programming right away.
• Python looks more like a readable

WHAT CAN I DO WITH PYTHON…?
• System programming
• Graphical User Interface Programming
• Internet Scripting
• Component Integration
• Database Programming
• Gaming, Images, XML , Robot and more

WHY OTHER BRANCHES HAS
TO STUDY?
ECE- Python can be used for signal processing tasks using NumPy andSciPy. Toimplement
digital signal processing algorithms
EEE- controlling and automating test equipment. Python was originally created fortext parsing
so it’s amazingly useful to sift through huge amounts of text data to extract useful information -
digital oscilloscope-It can output waveforms as raw CSV data.
ME- Mechanical and automobile industries use python to automate tasks. To write scripts and
then import them to a CFD software to test numerous designs. Toperform numerical analysis.
CIV- the applications of data science in civil engineering: Population forecasting for urban
planning, water supply & sewerage system. Risk assessment andmitigation such as prediction
of floods, earthquakes, cyclones.

WHO USES PYTHON TODAY…
Python is being applied in real revenue-generating products by real companies.
For instance:
• Google makes extensive use of Python in its web search system.
• Intel, Cisco, Hewlett-Packard, Seagate, Qualcomm, and IBM use Python for
hardware testing.
• ESRI uses Python as an end-user customization tool for its popular GIS
mapping products.
• The YouTube video sharing service is largely written in Python
10

HISTORY
 Invented in the Netherlands, early 90s by Guido van Rossum
 Python was conceived in the late 1980s and its implementation
was started in December 1989
 Guido Van Rossum is fan of ‘Monty Python’s FlyingCircus’, this
is a famous TV show in Netherlands
 Named after Monty Python
 Open sourced from the beginning

TEXT BOOKS
1.“Python for Everybody: Exploring Data Using Python 3” Charles R. Severance
2.“Think Python: How to Think Like a Computer Scientist” Allen B. Downey

Introduction to the Python

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