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#+TITLE:    Manipulating Lists
#+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
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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