FDP- 102

on
Python: Essentials,
Programming and Analytics

Session-I: Introduction to Python

Taken by
Dr. Aakash,
Assistant Professor (Operation & IT),
Amity University, Noida, Uttar
Pradesh
Date: 28-Oct-2022 (Friday)
Timings: 3.00 PM to 5.00 PM
 • Python: Dynamic programming

What is language which supports

several different programing
paradigms:

Python? o Procedural Programming

o Object Oriented
Programming (OOP)
o Functional Programming

• Standard: Python byte code is

executed in the Python
interpreter (similar to Java)

• → platform independent code

 • Extremely versatile language
o Website development, data

Why analysis,
maintenance,
analysis, etc.
server
numerical

•
Python? •
Syntax is clear, easy to read and
learn (almost pseudo code)
Common language
• Intuitive object oriented
programming
• Full modularity, hierarchical
packages
• Comprehensive standard library
for many tasks
• Big community
• Simply extendable via C/C++,
wrapping of C/C++ libraries
• Focus: Programming speed
 •
Who uses •
On-line games
Web services
• Applications
Python? • Science
• Instrument control
• Embedded systems

Link:
en.wikipedia.org/wiki/Lis
t_of_Python_software
 Python is used for everything!
So who uses For example:
• “massively multiplayer
Python and online role-playing games”
like Eve Online, science
fiction’s answer to World of
what for? Warcraft,
• web applications written in
a framework built on
Python called “Django”,
• desktop applications like
Blender, the 3-d animation
suite which makes
considerable use of Python
scripts,
• the Scientific Python
libraries (“NumPy”),
instrument control and
embedded systems
What sort of
language is
Python?
 • Python does not have to be
explicitly compiled but
behind the scenes there is a
Continued… system that compiles
Python into an intermediate
code which is stashed away
to make things faster in
future.
• But it does this without you
having to do anything
explicit yourself.
• So from the point of view of
how you use it you can treat
it as a purely interpreted
language like the shell or
Perl.
 • Start implementation in December
1989 by Guido van Rossum (CWI)
• 16.10.2000: Python 2.0
o Unicode support
o Garbage collector
o Development process more
community oriented
• 3.12.2008: Python 3.0
o Not 100% backwards compatible
•
History 2007 & 2010 most popular
programming language (TIOBE Index: is
an indicator of the popularity of
programming languages.)
• Recommendation for scientific
programming (Nature News, NPG,
2015)
• Current version (October 24, 2022):
Python 3.11 (Link:
https://www.python.org/ftp/python/3.
11.0/python-3.11.0-amd64.exe)
• Python 2 is out of support! (Link:
https://python3statement.org/)
 11 software principles that
influence the design of Python:
1) Beautiful is better than ugly.
Zen of 2) Explicit is better than implicit.
3) Simple is better than complex.
4) Complex is better than
Python complicated.
5) Flat is better than nested.
6) Sparse is better than dense.
7) Readability counts.
8) Special cases aren’t special
enough to break the rules.
9) Although practicality beats
purity.
10)Errors should never pass
silently.
11)Unless explicitly silenced.
Is Python • For user programs: Python is
fast enough!

fast • Most parts of Python are

written in C
•
enough? For compute intensive
algorithms: Fortran, C, C++
might be better
• Performance-critical parts can
be re-implemented in C/C++ if
necessary
• First analyze, then optimize!
Technical • Downloads Link:
http://www.python.org
Issues: • Documentation Link:
http://www.python.org/doc/

Installing & • Free book Link:

http://www.diveintopython.org

Running • Python comes pre-

installed with Mac OS X
Python •
and Linux.
Windows binaries from
• Link: http://python.org/
• You might not have to do
anything!
 • Go to www.python.org and
download the latest version
of Python (version 3.11 or
3.7 as of this writing).
Installing • It should be painless to
install.

Python • If you have a Mac or Linux,

you may already have
Python on your computer,
though it may be an older
version.
• If it is version 2.7 or earlier,
then you should install the
latest version, as many of
the programs in this book
will not work correctly on
older versions.
 METHODS
How to 1) Installing Python 3
2) Installing Python 2
Install 3) Adding the Python Path
Python on to Windows

Windows • Link for Guiding

Python Installation
in Windows:
https://www.wikihow.c
om/Install-Python-on-
Windows
The interpreter can be started in interactive mode
 • IDLE is a simple integrated
development environment
(IDE) that comes with Python.
Integrated
Development • It’s a program that allows you
to type in your programs and
Environment ( run them.

IDLE) • There are other IDEs for

Python, but for now I would
suggest sticking with IDLE as it
is simple to use.

• You can find IDLE in the

Python 3.4 folder on your
computer.
 • When you first start IDLE, it
starts up in the shell, which
is an interactive window
where you can type in
Python code and see the
CONTINUED… output in the same window.

• I often use the shell in place

of my calculator or to try
out small pieces of code.

• But most of the time you

will want to open up a new
window and type the
program in there.