2014 (old posts, page 4)

Highlights Of Illumina BaseSpace WWDC In Bangalore!

Illumina develops, manufactures and markets integrated systems for the analysis of genetic variation and biological function. BaseSpace is Illumina’s genomics computing environment for next-generation sequencing (NGS) data analysis.

To teach developers, how to build and launch your own bioinformatics apps on BaseSpace, Illumina conducted a two day hands-on hackathon. Here is the summary of the event.

Raymond Tecotzky provided a good overview of basespace, plugged in missing information in various situations. Most importanatly super charged participants & the team.

James Hadfield & Ramesh Hariharan delivered good talks about their work on Genomics and their experience with Basespace.

Sucheth Koppa provided a good overview of BaseSpace Onsite & how you can keep all data on-premises.

Mayank Tyagi & his team stressing the importance of Docker, taught how to build apps on Basespace.  Hands-on hackathon & very informative.

Along with talks, food, wine, t-shirt & USB Drive(16 GB) are also great.

Here are a few snaps of the #basedev2014. All credit goes to Raymond.

Thanks to Raymond, Manyak & the entire for their effort!

A Few Chrome Extensions For Efficient & Productive Web Surfing!

I do use a lot of chrome extensions. Here are some of my favorite extensions which I use for everyday browsing.

1. AdBlock

Blocks annoying ads all over the web.

2. Vimium

I love browsing web with just keyboard. If you are familiar with Vim, install it without any second thoughts. Vimium provides keyboard shortcuts for navigation and control in the spirit of Vim.

3. Alexa Traffic Rank

If you are a webmaster or stataholic, you need this.

4. Google Quick Scroll

If you have searched for something on Google and landed on a page with lot of text, it helps you jump directly to the relevant bits of a search result.

5. Hover Zoom

Simply enlarge thumbnails by hovering your mouse.

6. HoverReader

While reading an article, if you encounter a hyperlink, peek into it by hovering the mouse.

7. Magic Actions for YouTube

Auto HD, Ad Block, Cinema Mode, Mouse Wheel Volume Control and more magic actions for YouTube.

8. Readable Wikipedia  WikiWand

Previously I used Readable Wiikpedia to read wiki articles.
But now I use WikiWand. It provides amazing look for our beloved Wikipedia.

9. AutoPager Chrome

Scroll through paginated web pages.

10. DevTools Auto Save

Saves changes to your CSS and JS right from the browser. Comes in handy for web developers.

11. OneTab:
Pull all tabs into single tab & save up to 95% memory and reduce tab clutter.

12. Popup Blocker Pro:
Blocks all annoying popups and popunders the professional way. You will never see popups anymore. Permissions Visit website

13. Stylebot:
Change the appearance of websites instantly. Preview and install styles created by other users on stylebot.me

14. Tab Number:
Tab number show number on each tab. If you want to jump a particular tab, So you can jump around easily by pressing ALT + pagenum.

15. Thin Scroll Bar:
Thin Scroll Bar to increase screen space for little more visibility.


Use Space As Both Space & Control - Avoid Emacs Pinky!

Most of the  commands  in  Emacs start with  'Control'  &  'Meta'. Control key is present at the corners of the keyboard and its very uncomfortable to press it every-time to invoke a command. Most popular solution to this is to swap CAPS lock & CTRL key. But you have to press the key with Pinky which might cause Emacs Pinky.

A much better solution is to use space bar as control key. When you press the space bar, it will function as a normal space key. If you press it with any other key. it will function as control key. So, to run any commands, you can hold space with one thumb and press other key(s) with another hand which will be handy.

In Linux, you can achieve this with Space2Ctrl.

Install the dependencies, clone the repo, make and start the script.

sudo apt-get install libx11-dev libxtst-dev

git clone https://github.com/r0adrunner/Space2Ctrl

cd Space2Ctrl


./s2cctl start
Now you can use your space as space and control key.

If you are using Mac checkout KeyRemap4Macbook & for windows users there is Dual.

Automatically Remove Unused Imports & Variables From Python

Unused code will distract you(and other people) while reading code. Also, a single unused import can cause out of memory error. So, it is considered as a bad practice. Lets try to get rid of unused imports & variables from Python code.

Autoflake removes unused imports and unused variables as reported by pyflakes. Install it
pip install --upgrade autoflake    

Now select a file which you want to clean and run this in terminal
autoflake --in-place --remove-unused-variables example.py
It removes all unused imports & variables from the file.

Instead of running this command every time, I wrote a simple elisp function and assigned a F8 key to that function. So while writing the code itself it can clean it & it's much efficient.

;; Py-rm - Remove unused variables & imports from python

(defun pyrm ()


  (setq command (concatenate 'string "autoflake --in-place --remove-unused-variables " buffer-file-name))

  (shell-command command)

  ;; Reload the modified file

  (revert-buffer t t)


;; set a custom key for pyrm

(global-set-key [f8] 'pyrm)

Put the above code in your emacs configuration file, restart it & press F8 whenever you want to clean the code.

However, if you just need to highlight but not delete them, you can install flymake and then enter this.
M-x flymake-mode RET 
It just highlights the other syntax errors and unused imports but won't delete them.


Simple Python Code

Highlighted with flymake-mode

Cleaned with autoflake

Amazing Things To Do With Python In Everyday Life!

In Python, with a couple of imports and a few lines of code, we can do amazing things.

I am post here a list of amazing scripts/projects that I came across.

VLC With Subtitles:  Automatically download and load correct subtitles in VLC.

Youtube-dl: Small command-line program to download videos from YouTube.com and other sites.

20482048 Game with Kivy(Also available on Play StoreiTunes, and for terminal)

A smart and nice Twitter client on terminal wrote by Python. 

Send Personal Messages:  Thank all your friends who wished on your birthday on Facebook.

T A command-line todo list manager for people that want to finish tasks, not organize them.

qblog: Build & test a blog with Django 1.7 in less than 17 minutes.

coureseraScript for downloading Coursera.org videos and naming them.

sh: Call any shell program as if it were a function.

AutoFlakeRemove unused imports and unused variables as reported by pyflakes.

Django-Extensions: Collection of global custom management extensions for the Django Framework.

Pattern: Scrape & Process Web easily.

PDFMiner:  Exact a part(or entire) of text from pdf.
tqdmAdd a progress meter to your loops in a second

onionshareSecurely and anonymously share a file of any size.

q: - Run SQL directly on CSV or TSV files.

iPython Notebook: Combine code execution, text, mathematics, plots and rich media into a single web document & share with others.

How To Get Telugu Books If You Are Out Of Andhra!

If you are a (Telugu) book worm and you are living out of Andhra, then getting Telugu books is a huge problem. Thankfully a lot of online stores are coming forward to solve this problem. Lets look at a few sites where we can get Telugu print & e-books.

1. Digital Library of India: [Free]

Government of India is spending a crazy amounts of money to digitize public domain books. This is the best place to get telugu ebooks for free of cost. Currently there are 23,370 books in Telugu. Eventhough you won't new books there, you can find a lot of great classics.

2. Kinige:

This is the most popular site(Alexa Traffic Rank: 118,798) for buying Telugu books online. They supply both print books & e-books. The good thing about Kinige is they rent the for a period of 30 days at a reduced price. Most books are available here and is a good place to get started.

3. Logili

One more popular (Alexa Traffic Rank: 138,459) website to buy books online. It's also has great collection. However they sell only print books but no e-books. At times when there are no print books on Kinige, this is a great alternative.

4. Flipkart:

Most of you heard of Flipkart. You can't get all telugu books here but a few. If you are a regular shopper at flipkart, you might get available books at discount price.

5. Amazon:

It is struggling & competing with other online stores in India. Here also you can find a reasonable number of telugu books are great discounts.

You can also buy telugu books at Supatha, BooksForYou, InfiBeam, EveningHour.

In addition to these sites, authors or publication houses might be running their own sites ( for example Yandamoori sells his books from his site also ), you can buy from them also.


Recently I came across AVKF. It also has a great collection of telugu books.

Fixing Colors Issues In VLC Media Player on Ubuntu 14.04!

Have you ever played a video on VLC or any other media player and seen this type of washed out colors or distorted video like these??

To get rid of this problem, just open preferences from the Tools menu. Uncheck "Accelerated video output" from the video settings.

 If you are using and old version of VLC, you might have an option to "Skip frames", you can select that option. Save your preferences and restart the VLC player. Now you can enjoy your videos. If the problem still persists make sure you have installed all your video drivers.

Django Meetup In Bangalore

"Krace played a key role in bringing back the almost dead Bangalore Python Users Group into action."
- Shreyansh Singhal on YourStory.

Few weeks back, while I was searching for Python I came across Krace's blog. Then I checked his Github, Stackoverflow, Quora profiles and I was amazed.

Last week when I found there was a Django users workshop by him & his friends, without a second thought I decided to go.

Since the organizers marked the location (ThoughtWorks Technologies) on Google Maps, its quite easy to reach there w/o any trouble.

Workshop took place from 10 A.M. to 5 P.M. The goal was to build a simple phone book app to add/view/edit contacts with Django & SQLite.

Before starting of workshop, organizers helped with installation of requirements(Django & South).

Krace showed the agenda. At each & every step, he first explained what he is going to do. Then he would do it and gives us time to complete the task. All organizers patiently helped in troubleshooting the errors at each and every step. In the end we had little Q & A session.

Overall it was a great hands on experience with great content & crew! Looking forward for more meetups!! Thank You very much!!!

If you are form Bangalore & love Python, don't miss Django & BangPypers meetup.

P.S: A snap of workshop.. 

A Weather Widget For Your Terminal!

Getting weather info right on the terminal..?? Sounds cool.. Isn't it? With Python, it's even easier to make one! Lets get started.

First we need to determine the location of the user. So let's find out ip address. There are a lot of sites which gives the ip address but this site is the simplest & very easy to get.

Once we have the ip address, we can use it to determine the location and then use any weather api to get the info. However Worldweatheronline api gives weather info directly based on the api, which makes it easier to fetch data.

We can get the data in JSON format and by parsing it we can make the weather widget.

I wrote a simple script for that and here is the sample output of the script.


Auto Fill Dynamic(Ajax) Web Page & Scrape The Result!

Large scale web scraping is always a big deal. However a simple crawl or filling web form & scraping the result is much easier than you think. While scraping a static page is a cat walk, it is little tricky to scrape dynamic web pages!

I wrote a simple script to fill a dynamic page ( http://www.emirates.com/account/english/miles-calculator/miles-calculator.aspx ) & scrape the result  using Python, Mechanize & BeautifulSoup.

Check our the code on github. Its just a few lines of code and its self explanatory.

Clone the repo.
 git clone https://github.com/ChillarAnand/Emirates-Miles-Calculator.git

Lest calculate howmany miles will be rewarded for travelling from Delhi(DEL) to New York(JFK).
 python emirates.py DEL JFK

Here is the sample output of the script.