UP & RUNNING WITH PYTHON

SESSION 1
07 . 08 . 2016

USICT

Hello Everyone!

  • Welcome to USICT - Python Code Sprint
  • We are Hemang & Neelansh
  • Let's do some MAGIC.

THE SINGLE MOST IMPORTANT SKILL FOR A COMPUTER SCIENTIST IS

PROBLEM SOLVING



PROBLEM SOLVING MEANS

  • The ability to formulate problems, "Oh Man! Forgot my fork today!"
  • Think creatively about solutions, "Hey there! Do you have a bunch of toothpicks and a rubber band?"
  • And express a solution clearly and accurately!

ON THE MENU

  • Once upon a time there was no Python.
  • Syntax
  • Conditionals
  • Functions
  • Assembling Everything
  • Git & GitHub

BEFORE 2000

  • Python was not so popular even though work started on it in late 1980s.
  • C, C++, Java, C# and blah blah blah.
  • A thousand different programming languages taking minutes to write and execute any kind of useable program.
  • Seriously, minutes? Are you f*** kidding me?

C++ Hello World

				

#include < iostream.h >

using namespace std;

void main(){
	cout<<"Hello World";
}

Java Hello World

				
public class HelloWorld{

	public static void main(String[] args){
		System.out.println("Hello World!");
	}

}

Assembler 8051 Hello World 


	Org 0

		 mov dptr,#msg
		 mov R0,#30h
	loop:
		 clr a
		 movc a,@a+dptr
		 jz end
		 mov @R0,a
		 inc R0
		 inc dptr
		 sjmp  loop

	end:
			jmp $

	msg:
			db 'Hello World",0

All this for printing "Hello World!" on screen !

Hello World in Python

				
					print "Hello World!"

1 Second

TWO THINGS BEFORE WE
START PYTHONING

  • How computer interacts with Python?
  • DEBUGGING

COMPUTER AND PYTHON

TWO TYPES OF LANGUAGES

  • HIGH LEVEL, LOW LEVEL
  • LOW - Machine , Assembly
  • Computers Understand Only Machine language (0s and 1s)
  • So all the high level languages and also even Assembly language is converted to Machine.

COMPUTER AND PYTHON

TWO WAYS HOW EVERYTHING IS
CONVERTED TO MACHINE LANGUAGE

  • Source Code -> Interpreter -> Output
  • Source Code -> Compiler -> Object Code -> Executer -> Output
  • What on earth is Object code?

OKAY! LOT OF TWOs

THREE KINDS OF ERROR TO WATCH OUT

  • Syntax Error
  • Logical Error (also called Semantics Error)
  • Runtime Error (called Exceptions)

LET'S BEGIN PYTHON

INSIDE THE PYTHON FOLDER

  • Python 3
  • Text Editor or Code Editor
  • Codelens

SETTING UP

PYTHON SYNTAX

  • Variables, Expressions and Statements
  • Values and Data Types
  • Type conversion functions
  • Variables
  • Variable Names and Keywords
  • Statements and Expressions
  • Operators and Operands
  • Input
  • Order of Operations

HOMEWORK, EH?

RESOURCES

  • How to think like a Computer Scientist
  • Codelens
  • Learn Python the Hard Way
  • Python Tutorial by Guido Van Rossum

    That is all.

    Questions?