diff options
Diffstat (limited to 'dictionaries/slides.org')
| -rw-r--r-- | dictionaries/slides.org | 111 |
1 files changed, 61 insertions, 50 deletions
diff --git a/dictionaries/slides.org b/dictionaries/slides.org index 7ad28db..b618829 100644 --- a/dictionaries/slides.org +++ b/dictionaries/slides.org @@ -18,7 +18,7 @@ #+LaTeX_HEADER: commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen}, #+LaTeX_HEADER: showstringspaces=false, keywordstyle=\color{blue}\bfseries} -#+TITLE: Dictionaries +#+TITLE: #+AUTHOR: FOSSEE #+EMAIL: info@fossee.in #+DATE: @@ -29,7 +29,25 @@ #+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 +* +#+begin_latex +\begin{center} +\vspace{12pt} +\textcolor{blue}{\huge Dictionaries} +\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 - Creating dictionaries - empty dictionaries - with data @@ -44,45 +62,9 @@ - A Key-Value pair data structure - Provide key-value mappings -* Creating dictionary - - Empty dictionary - - ~mt_dict = {}~ - - ~[]~ - lists - - ~{}~ - dictionaries - - With data - #+begin_src python - extensions = {'jpg' : 'JPEG Image', - 'py' : 'Python script', - 'html' : 'Html document', - 'pdf' : 'Portable Document Format'} - #+end_src - - *Note* - ordering in dictionaries cannot be relied on * Accessing Elements - syntax : extensions[key] - - : In []: print extensions['jpg'] - : Out []: JPEG Image - : In []: print extensions['zip'] -* Adding and Deleting values - - Adding a new value - : In []: extension['cpp'] = 'C++ code' - adds a new key /cpp/ with /C++ code/ as value - - Deleting values - : In []: del extensions['pdf'] - deletes the key-value pair identified by /pdf/ - - Changing value associated with a key - : In []: extension['cpp'] = 'C++ source code' - changes the value of the existing key -* Checking for container-ship of keys - : In []: 'py' in extensions - : Out []: True - Returns *True* if the /key/ is found. - : In []: 'odt' in extensions - : Out []: False - Returns *False* if the /key/ is not found. - * Retrieve keys and values - ~.keys()~ method : In []: extensions.keys() @@ -91,27 +73,56 @@ : In []: extensions.values() Returns the list of values in the dictionary. * Exercise 1 - Print the keys and values in the dictionary one by one. + - Print the keys and values in the dictionary one by one. * Summary - - Creating dictionaries + In this tutorial, we have learnt to, + + - Create dictionaries namely -- - empty dictionaries - - with data - - ~.keys()~ method - - ~.values()~ method - - Iterating over dictionaries -* Thank you! + - dictionaries with data. + - Access elements in the dictionaries using the keys. + - Add elements to a dictionary by assigning a value to a key. + - Delete elements from a dictionary by using the function ``del''. + - Retrieve the keys and values by using the methods ``.keys()'' and + ``.values()'' respectively. + - Iterate over elements of a dictionary using a ``for'' loop. +* Evaluation +1. Container-ship of values can be checked in a python dictionary + + - True + - False + +2. Consider the python dictionary + + : x = {'a':['a','b','c'], 'b':(1, 2, 3), + : 1:{1:'one', 2:'two'}, + : 10:{10:'ten', 11:'eleven'}} + + What will the following code return? + ~(1, 2, 3) in x.values()~ + + - True + - False + - Container-ship of values cannot be checked in dictionaries + - The dictionary is invalid +* Solutions +1. False + +2. True +* #+begin_latex \begin{block}{} \begin{center} - This spoken tutorial has been produced by the - \textcolor{blue}{FOSSEE} team, which is funded by the + \textcolor{blue}{\Large THANK YOU!} \end{center} + \end{block} +\begin{block}{} \begin{center} - \textcolor{blue}{National Mission on Education through \\ - Information \& Communication Technology \\ - MHRD, Govt. of India}. + For more Information, visit our website\\ + \url{http://fossee.in/} \end{center} \end{block} #+end_latex + |