Most of the commands in Emacs start with 'Control' & 'Meta'. Control key is present at the corners of the keyboard, and it's 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, we 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

make

./s2cctl start

Now you can use your space as space and control key.

If you are using Mac, you can use Karabiner with the following modification.

{
  "title": "Change spacebar to spacebar & control",
  "rules": [
    {
      "description": "SpaceControl",
      "manipulators": [
        {
          "from": {
            "key_code": "spacebar",
            "modifiers": {
              "optional": [
                "any"
              ]
            }
          },
          "to": [
            {
              "key_code": "right_control"
            }
          ],
          "to_if_alone": [
            {
              "key_code": "spacebar"
            }
          ],
          "type": "basic"
        }
      ]
    }
  ]
}

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 ()
  (interactive)
  (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.

Screenshots

Simple Python Code

Unused code highlighted with flymake-mode

Cleaned with autoflake

If you are a (Telugu) bookworm, 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. Let's look at a few sites where we can get Telugu print & e-books.

1. Digital Library of India¹: [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. Kinige²:

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. Logili³:

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. Flipkart⁴:

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. Amazon⁵:

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.

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