What version of Ubuntu do I have?

Ubuntu is a free, Linux-based open source operating system with a long list of releases. When you first log in to an Ubuntu system, it is always a good idea to check the version of Ubuntu on the machine before you do anything on it. Finding which version of Ubuntu runs on your system may be essential to fix problems or seek installation guides.
In this tutorial, we’ll show you several ways to find your Ubuntu version using the command line or from the graphical interface.

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How to fix “unindent does not match any outer indentation level” indentation error in Python

Fix unindent does not match any outer indentation level

Python is an emerging language in the developer field. It’s great as first language because it’s concise, easy to read, fast enough for most tasks and has a large ecosystem which fits mostly everything from web development to scientific programming.

Back then when I was new to Python, one of the thing that frustrates me the most was IndentationError: unindent does not match any outer indentation level. Look at how it made people pull their hair out :

Fixing this error is easy, and should be easy, but to understand why it happens so that you can write clean, concise, maintainable code requires more reading.

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