diff -r 5c9dc3419df5 -r 40b6a90f41b7 parsing_data/slides.org --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/parsing_data/slides.org Mon Oct 11 01:02:02 2010 +0530 @@ -0,0 +1,84 @@ +#+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: Parsing Data +#+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 + - What is meant by parsing data? + - String operations required for parsing + - Converting between data-types. +* Question 1 + Split the variable line using a space as argument. Is it same as + splitting without an argument ? +* Solution 1 + We see that when we split on space, multiple whitespaces are not + clubbed as one and there is an empty string everytime there are two + consecutive spaces. +* Question 2 + What happens to the white space inside the sentence when it is + stripped? +* Solution 2 + #+begin_src python + In []: a_str = " white space " + In []: a_str.strip() + #+end_src +* Question 3 + What happens if you do =int("1.25")= +* Solution 3 + It raises an error since converting a float string into integer + directly is not possible. It involves an intermediate step of + converting to float. + #+begin_src python + In []: dcml_str = "1.25" + In []: flt = float(dcml_str) + In []: flt + In []: number = int(flt) + In []: number + #+end_src +* Summary + + How to tokenize a string using various delimiters + + How to get rid of extra white space around + + How to convert from one type to another + + How to parse input data and perform computations on it +* 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 + +