Beginning python programming

Beginning Python
Programming
Kantesh Raj
(@kanteshraj)

Quick Question

Name major programming
languages taught at school or
colleges ?

According to my knowledge
● C

● C++

● Java

● PHP / ASP.NET (Few Places)

Then....

Why we need python?

Lets do a simple activity for this

Activity

Write a code for “Hello World”
in any language you like, other
than python

Hello World Program in C

#include <stdio.h>
main()
{
printf(“Hello World”);
}

// No. Of Lines Of Code: 5

How many lines of code
you wrote
?

Now,

Hello World program in Python

What is Python?

● Python is dynamic, open source
programming language with a focus
on simplicity and productivity.
● It was developed in 1991

Who is he?

Guido van Rossum
Creator of Python

Python
● Interpreter Based language
● Designed to be easy to learn and master
-> clear syntax
-> Very few keyword
● Highly portable
-> Run on all platform(OS)
● Large set of library
-> libraries for huge number of software

Can Do
● System Administration
● GUI programming
● Web Application
● Database Apps
● Scientific Application
● Games
● Android App development

Getting Familiar with python
● Extension for python file : .py

● For example
Hello.py
ALiAS.py

No Semicolons

print “Hello Everyone”
print 2+2

Indentation
● File: HelloWrong.py
print “Hello”
print “World”
● File: HelloCorrect.py
print “Hello”
print “World”

No variable data type declaration
x=5
print x
print x*9

● Python will do it for you :)

Input from keyboard
● Function for that: raw_input()
● It always return string type
● Example:
x=raw_input(“Enter number”)
print x
y=int(x)+2
print y
print “the final value is ”+str(y)

It will make your work easy

● bpython

● ipython

Demo 1

Program to take input from user
and print “python is awesome”, if
user enter number less than 5
otherwise print “Hello ALiAS”.

Demo 2
● Write a function for printing value
from array using for loop.
● Use above function in other program

by help of import.

Demo 3
● Program to create a file in python
and write “this is python basic
session.”

Demo 4
● Python program for listing file in
home directory

Where to refer ?
● Python Website: documentation
http://www.python.org/

● Dive into python:ebook
http://www.diveintopython.net

● How to think like a computer scientish:
ebook
http://www.greenteapress.com/

PyCon

http://in.pycon.org/2012/

About Me
● Name: Kantesh Raj
● Twitter: @kanteshraj
● Blog: kanteshraj.blogspot.in

Thank You

Beginning python programming

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