1. In Vim, if we have selected some characters or paragraph and want to count the number of characters then we have to type :'<,'>s/\%V./&/gn while the paragraph is selected.

2. In Linux, instead of using .env file for storing the environment variable, we can write that inside the .bashrc file if we have access to .bashrc. Example :- export SOME_SECRET_KEY="some_random_key_for_your_app".

3. In Python, to access the environment variable we have to use getenv() or environ from the os module. Example -

import os 

print(os.environ['SOME_SECRET_KEY'])

print(os.getenv('SOME_SECRET_KEY')

4. In Linux, .bashrc does not support storing and exporting a json content. But there is a way. We have to stringify that by making that json content single line and adding quotation mark at the beginning and the end of the json content. Then you just have to jsonify in your programming language.

export FIREBASE_CREDS_JSON='{"project_id": "your id goes here", "type": "your project type", "client_id": "your client_id", "...": "..."}'

import os, json

creds_string = os.getenv('FIREBASE_CREDS_JSON')

creds_dict = json.loads(creds_string)

That’s it for this week. Meeting you next week.