{
 "metadata": {
  "name": "00_intro"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Python for beginners"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "Everything in python is an object."
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "An object contains attributes, some of this attributes are callable and are called method.\n",
      "Are called function the callable attributes of the \"module\" objects."
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "Today I will present:\n",
      "\n",
      "* data types;\n",
      "* syntax;\n",
      "* some useful library\n",
      "\n",
      "Before to start you need to open a terminal, moving inside the directory with\n",
      "\n",
      "    $ cd doc/python/\n",
      "\n",
      "and type:\n",
      "    \n",
      "    $ ipython notebook --pylab inline\n",
      "\n",
      "You can modify the code inside the cell and execute with: \"Shift + Enter\" or with \"Ctrl + Enter\" or using the \"play\" icon above"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "2 + 2"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "Python have a huge library, therefore before to start to implement something you should check that it is not already implemented, moroever a lot of software is available outside the standard library have a look to the: [Python Package Index](http://pypi.python.org/pypi)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "After you have insalled python before use function and object of a library you need to load the library inside your program:"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import this"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "Then you can start using variables that are defined inside, like:"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "this.c"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print this.s"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "Other ways to import things in python are:"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import os, sys, time, math    # import more than one library at the same time"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import numpy as np  # import a library changing its name"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "from timer import Timer  # import only one thing from a library"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "from math import *   # import all function and variables from the math library..."
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
 ]
}