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#+TITLE:   
#+AUTHOR:    FOSSEE
#+EMAIL:     
#+DATE:    

#+DESCRIPTION: 
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#+LANGUAGE:  en
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* 
#+begin_latex
\begin{center}
\vspace{12pt}
\textcolor{blue}{\huge Manipulating Lists}
\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,

  - Concatenate two lists.
  - Learn the details of slicing and striding of lists.
  - Sort and reverse lists.
* Pre-requisite
Spoken tutorial on -
- Getting started with Lists.
* Exercise 1
  Obtain the primes less than 10, from the list  ~primes~. 
* Slicing
  #+begin_src python
    p[start:stop]
  #+end_src python
  - Returns all elements of ~p~ between ~start~ and ~stop~
  - The element with index equal to ~stop~ is *not* included. 
* Exercise 2
  Obtain all the multiples of three from the list ~num~.
* Solution 2
  #+begin_src python
    num[::3]  
  #+end_src python
* Exercise 3
  Given a list of marks of students in an examination, obtain a list
  with marks in descending order.
  #+begin_src python
    marks = [99, 67, 47, 100, 50, 75, 62]
  #+end_src python
* Summary
  In this tutorial, we have learnt to,

  - Obtain parts of lists using slicing and striding.
  - Concatenate lists using the ``plus'' operator.
  - Sort lists using the ``sort'' method. 
  - Use the method ``reverse'' to reverse the lists.

* Evaluation
1. Given the list primes, primes = [2, 3, 5, 7, 11, 13, 17, 19, 23,
   29], How do you obtain the last 4 primes?

2. Given a list, p, of unknown length, obtain the first 3 (or all, if
   there are fewer) characters of it. 
  
3. ``reversed'' function reverses a list in place. True or False?
* Solutions
1. primes[-4:]

2. p[:3]

3. False 
* 
#+begin_latex
  \begin{block}{}
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  \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