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#+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:
#+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
*
#+begin_latex
\begin{center}
\vspace{12pt}
\textcolor{blue}{\huge Parsing Data}
\end{center}
\vspace{18pt}
\begin{center}
\vspace{10pt}
\includegraphics[scale=0.95]{../images/fossee-logo.png}\\
\vspace{5pt}
\scriptsize Developed by FOSSEE Team, IIT-Bombay. \\
\scriptsize Funded by National Mission on Education through ICT\\
\scriptsize MHRD,Govt. of India\\
\includegraphics[scale=0.30]{../images/iitb-logo.png}\\
\end{center}
#+end_latex
* Objectives
At the end of this tutorial, you will be able to,
- Split a string using a delimiter.
- Remove the whitespace around the string.
- Convert the datatypes of variables from one type to other.
* Exercise 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.
* Exercise 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
* Exercise 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
* Evaluation
1. How do you split the string "Guido;Rossum;Python" to get the words.
2. How will you remove the extra whitespace in this sentence
" Hello World "
3. What does int("20.0") produce
- 20
- 20.0
- Error
- "20"
* Solutions
1. line.split(';')
2. " Hello World ".strip()
3. Error
*
#+begin_latex
\begin{block}{}
\begin{center}
\textcolor{blue}{\Large THANK YOU!}
\end{center}
\end{block}
\begin{block}{}
\begin{center}
For more Information, visit our website\\
\url{http://fossee.in/}
\end{center}
\end{block}
#+end_latex
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