Basic overview of python for newbie

1. Beginning Python
Programming
Kantesh Raj
(@kanteshraj)

2. Quick Question
Name major programming
languages taught at school or
colleges ?

3. According to my knowledge
● C
● C++
● Java
● PHP / ASP.NET (Few Places)

4. Then....
Why we need python?
Lets do a simple activity for this

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

6. Hello World Program in C
#include <stdio.h>
main()
{
printf(“Hello World”);
}
// No. Of Lines Of Code: 5

7. How many lines of code
you wrote
?

8. Now,
Hello World program in Python

9. print “Hello World”

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

11. Who is he?

12. Who is he?
Guido van Rossum
Creator of Python

13. 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

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

15. Getting Familiar with python
● Extension for python file : .py
● For example
Hello.py
ALiAS.py

16. No Semicolons
print “Hello Everyone”
print 2+2

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

18. No variable data type declaration
x=5
print x
print x*9
● Python will do it for you :)

19. 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)

20. It will make your work easy
● bpython
● ipython

21. Demo 1
Program to take input from user
and print “python is awesome”, if
user enter number less than 5
otherwise print “Hello ALiAS”.

22. Demo 2
● Write a function for printing value
from array using for loop.
● Use above function in other program
by help of import.

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

24. Demo 4
● Python program for listing file in
home directory

25. 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/

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

27. Any Question ?

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