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#+TITLE:    Manipulating Lists

#+AUTHOR:    FOSSEE

#+EMAIL:     

#+DATE:    

#+DESCRIPTION: 

#+KEYWORDS: 

#+LANGUAGE:  en

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#+STARTUP:    align fold nodlcheck hidestars oddeven lognotestate

* Outline

  In this session we shall be looking at 

  - Concatenating lists

  - Obtaining parts of lists

  - Sorting lists

  - Reversing lists

* Question 1

  Obtain the primes less than 10, from the list ~primes~. 

* Solution 1

  #+begin_src python

    primes[0:4]

  #+end_src python

* 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. 

* Question 2

  Obtain all the multiples of three from the list ~num~.

* Solution 2

  #+begin_src python

    num[::3]  

  #+end_src python

* Question 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

* Solution 3

  #+begin_src python

    sorted(marks)[::-1]

  #+end_src python

OR

  #+begin_src python

    sorted(marks, reverse=True)

  #+end_src python

* Summary

  In this tutorial session we learnt

    + Obtaining parts of lists using slicing and striding

    + List concatenation

    + Sorting lists 

    + Reversing lists

* 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