Development

Python Multiprocessing - Right Way

Learn how to combine multiprocessing and threading, and how to organize your multiprocessing classes in the right way.

Python Development

Awk BuiltIn Variables

The following is a list of variables that awk sets automatically on certain occasions in order to provide information to your program. The variables that are specific to gawk are marked with a pound sign (#). These variables are gawk extensions. In other awk implementations or if gawk is in compatibility mode (see section Command-Line Options ), they are not special.

VARIABLE NAME	DESCRIPTION
FS	input field separator variable
OFS	Output Field Separator
RS	Input Record Separator variable
ORS	Output Record Separator Variable
NR	Number of Records
NF	Number of Fields in a record
FILENAME	Name of the current input file
FNR	Number of Records relative to the current input file
RLENGTH	length of the substring matched by the match() function
RSTART	first position in the string matched by match() function

FS - input field separator variable

It represents the (input) field separator and its default value is space. You can also change this by using -F command line option.

Linux Linux Utilities Bash Development

Awk If Statement

In this awk tutorial, let us review awk conditional if statements with practical examples.

Normally conditional statement checks the condition, before performing any action. If the condition is true action(s) are performed. Similarly action can be performed if the condition is false.

Conditional statement starts with the keyword called "if". Awk supports three different kind of if statement.

awk If Statement

Single Action: Simple If statement is used to check the conditions, if the condition returns true, it performs its corresponding action(s).

Linux Linux Utilities Bash Development

FastAPI language translations I18n Step by Step

Since the beginning of 2020, FastAPI has been gaining momentum as one of the potential alternatives to Flask server for RESTful API. If you are an existing FastAPI user, you should be aware that it does not come with built-in internationalization, and that will likely not change soon, because internationalization strategies are application-dependent.

The following tutorial focuses on server-side i18n .

This tutorial will show you how to i18n your FastAPI web application easily using the following Python libraries:

Python Development

CSS - How add gradient over image

How to add gradients to images without background-image or background in css style file

Development

Better SQLAlchemy

In this article, I will dive into the world of SQLAlchemy, uncovering the best practices for optimizing database interactions in Python applications. From designing efficient data models to managing transactions, I will guide you through a range of techniques that will help you build scalable and high-performing applications.

Python Databases Development

Database integration tests with Pytest, SQLAlchemy and Factory Boy with Faker

In this little example, I’m going to show a possible procedure to easily test your piece of code that interacts with a database.

Python Development Databases

Python Cheatsheet 1

Python is the most popular programming language in data science. Use this cheat sheet to jumpstart your Python learning journey.

Python Development

Bash: if statement

A Shell script usually needs to test 'if' a command succeeds or a condition is met. In Bash, this test can be done with a Bash 'if statement'. As with any other programming language, Bash comes with conditional expressions that allow you to test for conditions and alter the control flow if the condition is satisfied or not.

Bash Development

Bash: Guide to Bash IFS variable

The IFS is an acronym for Internal Field Separator or Input Field Separator. The $IFS is a special shell variable in Bash, ksh, sh, and POSIX. Let us see what $IFS is and why you need to use it while writing shell scripts under Linux and Unix.

Bash Development

NumPy Illustrated: The Visual Guide to NumPy

NumPy is a fundamental library that most of the widely used Python data processing libraries are built upon pandas , inspired by PyTorch , or can efficiently share data with (TensorFlow , Keras , etc). Understanding how NumPy works gives a boost to your skills in those libraries as well. It is also possible to run NumPy code with no or minimal changes on GPU .

Python Development

Bash: Guide to Bash Arrays

The Bash array variables come in two flavors, the one-dimensional indexed arrays, and the associative arrays. The indexed arrays are sometimes called lists and the associative arrays are sometimes called dictionaries or hash tables. The support for Bash Arrays simplifies heavily how you can write your shell scripts to support more complex logic or to safely preserve field separation.

This guide covers the standard bash array operations and how to declare (set), append, iterate over (loop), check (test), access (get), and delete (unset) a value in an indexed bash array.

Bash Development