Sathiya Sarathi Gunasekaran

Articles: 23

Joined: Oct 19, 2020

Pythonist 🐍| Linux Geek who codes on WSL | Data & Cloud Fanatic | Blogging Advocate | Author

Recently published

Article

Guide to Understanding chmod

File access permissions and security are at the heart of *nix-based operating systems. File objects can belong to users and/or groups, and at times they need to be shared with various combinations of those two. There are multiple ways in *nix systems to reinforce secure sharing of these objects....

Sathiya Sarathi Gunasekaran

Apr 26, 2021·11 min read

Article

How to Concatenate String Variables in Bash

Bash utilities make so many tasks simple, but not all tasks have a straightforward command or operator. A very common and usual task in many scripting scenarios is concatenating string variables. Bash doesn't have a built-in function or command-line utility to concatenate two strings together. However, there are many ways...

Sathiya Sarathi Gunasekaran

Apr 16, 2021·3 min read

Article

How to Print Colored Text in Python

It's typical for CLI apps to return text in the same color of the terminal. There are always cases when we want to highlight output to the user, for example, a warning or error message. In those cases, a dash of color could make a difference. This article shows you...

Sathiya Sarathi Gunasekaran

Mar 22, 2021·9 min read

Article

How to Split a List into Even Chunks in Python

Splitting strings and lists are common programming activities in Python and other languages. Sometimes we have to split our data in peculiar ways, but more commonly - into even chunks. The language does not have a built-in function to do this and in this tutorial, we'll take a look at...

Sathiya Sarathi Gunasekaran

Mar 11, 2021·5 min read

Article

Python: How to Print without Newline or Space

The print() function in Python appends a newline to the output when displayed on the tty (teletypewriter A.K.A the terminal). When you don't want your message displayed with newlines or with spaces, how can you change the behavior of print()? This can easily be achieved by altering the...

Sathiya Sarathi Gunasekaran

Mar 10, 2021·5 min read

Article

Python: How to Remove a Key from a Dictionary

In this article, we'll take a look at how to remove keys from Python dictionaries. This can be done with the pop() function, the del keyword, and with dict comprehensions. Remove a Key Using pop(key,d) The pop(key, d) function removes a key from a dictionary and returns...

Sathiya Sarathi Gunasekaran

Feb 12, 2021·5 min read

Article

Covariance and Correlation in Python

Working with variables in data analysis always drives the question: How are the variables dependent, linked, and varying against each other? Covariance and Correlation measures aid in establishing this. Covariance brings about the variation across variables. We use covariance to measure how much two variables change with each other. Correlation...

Sathiya Sarathi Gunasekaran

Feb 05, 2021·10 min read

Article

Python: Get Size of Dictionary

In this article, we'll take a look at how to find the size of a dictionary in Python. Dictionary size can mean its length, or space it occupies in memory. To find the number of elements stored in a dictionary we can use the len() function. To find the size...

Sathiya Sarathi Gunasekaran

Feb 04, 2021·6 min read

Article

How to Use the crontab Command in Unix

When managing a computer, we may want to automate some tasks to run in certain periods or at the same time on each day/week/month. On a desktop, we may schedule update checks or virus scans. On a server, it's not uncommon for a myriad of checks and clean...

Sathiya Sarathi Gunasekaran

Jan 15, 2021·13 min read