diff -r 88a01948450d -r d33698326409 getting-started-with-for/slides.org --- a/getting-started-with-for/slides.org Wed Nov 17 23:24:57 2010 +0530 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,146 +0,0 @@ -#+LaTeX_CLASS: beamer -#+LaTeX_CLASS_OPTIONS: [presentation] -#+BEAMER_FRAME_LEVEL: 1 - -#+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent} -#+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra) -#+PROPERTY: BEAMER_col_ALL 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 :ETC - -#+LaTeX_CLASS: beamer -#+LaTeX_CLASS_OPTIONS: [presentation] - -#+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl} -#+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet} - -#+LaTeX_HEADER: \usepackage{listings} - -#+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries, -#+LaTeX_HEADER: commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen}, -#+LaTeX_HEADER: showstringspaces=false, keywordstyle=\color{blue}\bfseries} - -#+TITLE: Getting started with for -#+AUTHOR: FOSSEE -#+EMAIL: -#+DATE: - -#+DESCRIPTION: -#+KEYWORDS: -#+LANGUAGE: en -#+OPTIONS: H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t -#+OPTIONS: TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc - -* Outline - - ~for~ loop in Python. - - Blocks of code in Python. - - Indentation -* Whitespace in Python - - Whitespace is significant - - blocks are visually separated - - Blocks are indented using 4 spaces - : Block A - : Block A - : Block B - : Block B - : Block A - ~Block B~ is an inner block and is indented using 4 spaces -* Exercise 1 - Write a ~for~ loop which iterates through a list of numbers and find - the square root of each number. - : - The numbers are, - : 1369, 7225, 3364, 7056, 5625, 729, 7056, - : 576, 2916 -* Solution 1 - - Open text editor and type the following code - #+begin_src python - numbers = [1369, 7225, 3364, 7056, 5625, 729, 7056, - 576, 2916] - - for each in numbers: - print "Square root of", each, "is", sqrt(each) - - print "This is not in for loop!" - #+end_src -* Save \& run script - - Save the script as ~list_roots.py~ - - Run in ~ipython~ interpreter as, - : In []: %run -i list_roots.py -* Exercise 2 - From the given numbers make a list of perfect squares and a list of those which are not. - : - The numbers are, - : 7225, 3268, 3364, 2966, 7056, 5625, 729, 5547, - : 7056, 576, 2916 -* Exercise 3 (indentation in ~ipython~) - Print the square root of numbers in the list. - : - Numbers are, - : 7225, 3268, 3364, 2966, 7056, 5625, 729, 5547, - : 7056, 576, 2916 -* Indentation in ~ipython~ - : In []: numbers = [1369, 7225, 3364, 7056, 5625, - : ...: 729, 7056, 576, 2916] - - : In []: for each in numbers: - : ...: - Note the four spaces here - : - : - : - : - : - : -* Indentation in ~ipython~ (cont'd) - : In []: numbers = [1369, 7225, 3364, 7056, 5625, - : ...: 729, 7056, 576, 2916] - : In []: for each in numbers: - : ...: - Note the four spaces here - : - Now type the rest of the code - : ...: print "Square root of", each, - : ...: print "is", sqrt(each) - : ...: - : ...: -* Indentation in ~python~ interpreter - Find out the cube of all the numbers from 1 to 10. - : - /do it in the python interpreter/ -* Indentation in ~python~ interpreter (cont'd) - #+begin_src python - >>> for i in range(1, 11): - ... print i, "cube is", i**3 - ... - #+end_src -* ~range()~ function - - in built function in Python - - generates a list of integers - - /syntax:/ range([start,] stop[, step]) - - /example:/ - - range(1, 20) - /generates integers from 1 to 20/ - - range(20) - /generates integers from 0 to 20/ -* Exercise 4 - Print all the odd numbers from 1 to 50. -* Summary - - blocks in ~python~ - - indentation - - blocks in ~ipython~ interpreter - - ~for~ loop - - iterating over list using ~for~ loop - - ~range()~ function -* Thank you! -#+begin_latex - \begin{block}{} - \begin{center} - This spoken tutorial has been produced by the - \textcolor{blue}{FOSSEE} team, which is funded by the - \end{center} - \begin{center} - \textcolor{blue}{National Mission on Education through \\ - Information \& Communication Technology \\ - MHRD, Govt. of India}. - \end{center} - \end{block} -#+end_latex - -