Python-Scripts

A motley collection of python scripts. These are the different programs I wrote for fun.

Usage

I will be explaining for a user who works in the windows environment. If any issues come up, please dont hesitate to contact me.

• Install python 2.7.9 in your system. You can find it here.

• Just download any of the scripts to your computer OR copy the code into a text editor and save it as filename.py

• Check if the individual script prerequisites have been satisfied, they are given below.

• Double click on the file to run OR open the command line there and type

  python filename.py

Overview

• Root.py This is a program which takes a integer greater than or equal to one and finds its root to the specified accuracy. It was made mainly to compute an irrational number to a specified accuracy.

  No other prerequisites.

• sonicwall_login.py This is used for automating the whole process of logging into the Sonicwall firewall at my college. It is not of any use in my college anymore as logging into sonicwall is not necessary for accessing the Internet. I answered a question in superuser with this code.

  Prerequisites:

  You need to have the selenium python library installed. if you dont have that follow the instructions given at the end. Once you have confirmed succesfull installation of that library,

  Install Mozzila firefox, its possible to change the webdriver being used to that of chrome, but the existing code needs mozzila.Get it here.

  Also edit the python code and replace and with your actual username and password. If you arent trying to use this for nit trichy, find out the actual url of the login page (the url behind the frame) and replace https://192.168.20.1/auth1.html with your url. If you have any trouble finding it contact me.

• xkcd.py These xkcd comics are one of most favorite comics, so I actually modified the Manga Downloader, and made the xkcd comic downloader.

  Prerequisites:

  Replace this "F:\Work\xkcd\" with the path to the folder to which you want to download. Dont forget to add an extra backslash for every backslash (escape sequence)!

• Manga Downloader.py This was the first real usefull python script I wrote, It was just after I had heard about BeautifulSoup and I wanted to make a program which downloads manga.

  Prerequisites:

  You need to have the selenium python library installed. if you dont have that follow the instructions given at the end. Once you have confirmed succesfull installation of that library,

  Edit the script and change the 'base' and 'path' variables to the url of the first page, first chapter of the manga you want to download AND the location to which you want to download it respectively.

• Maximum_subarray.py This is the solution to the problem of finding the subarray with maximum sum, It has been solved in this script using both the dynamic programming approach (O(n)) as well as the divide and conquer approach (O(nlog(n)). I have explained the whole thing in my Blog

• Kruskal's.py This is a script to find the Minimal Spanning Tree of a connected, undirected graph, using Kruskal's algorithm which is a greedy algorithm. I have also included the I/O of a test I conducted with a graph and the image of the graph and its only MST. These are the Kruskal_test.txt and Kruskal_test.jpg I have used part of this code to answer this question

• scrape_results This is a script I had planned to write for some time now, After the second semester results came the first semester results werent available in the site. So now as third semester results are approaching I thought of writing this script which just automates the result gathering process, and stores the result in my custom class, which is stored to disk as a .student file (ususally just 2KB).

  Prerequisites:

  Yeah just like a lot of the other scripts you need selenium, Set it up.

  Edit the START_ROLL_NUMBER and END_ROLL_NUMBER to set the range of students you want to save. For reference the roll numbers of my year students are given.

• rename.py This script was born out my requirement to mass rename files (anime, tv series, movies) so that Kodi (known as XBMC) would pick it up. I would recommend understanding the code so that you can make the appropriate changes to it and run it.It will now just show what changes the script will make.

• numerical_methods When we got Janaki Raman Sir as our numerical methods teacher in Sem IV, he placed great emphasis on the concepts behind the methods, so I decided to implement them in python. I havent completed The Illinois method implementation, the regula falsi by itself fails in loads of cases.

Setting up Library's

• Download the zip file here. For selenium-2.44.0 this is the link, you can install all python library's in this way Extract it to a folder. Open command promt (or even windows power shell) inside the extracted folder. run the following command,

  python setup.py install

  check whether the installtion was succesfull, enter 'python' into the command line. (Without the quotes ofcourse!) python this should appear

  PS C:\Users\Aditya\Documents\Projects\Python\Python-Scripts> python Python 2.7.9 (default, Dec 10 2014, 12:24:55) [MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information.

  cool try importing the library you just installed, in our case try,

  import selenium

  if you dont get a ImportError then you have got it up running.. I guess... :P