#data-structures

#data-structures

Python lists and dataframes are two of the most used data structures in python.While we use python lists to handle sequential data, dataframes are used to handle tabular data.In this article, we will discuss different ways to convert pandas dataframe to list in python.Convert Pandas DataFrame to a List of Rows
Each row in a pandas dataframe is stored as a series object with column names of the dataframe as the index and the values of the rows as associated values.

Pandas dataframes are the data structures that we use to handle tabular data in python.This article discusses different ways to assign new columns to pandas dataframe using the assign() method.The Pandas assign() Method
The assign() method is used to assign new columns to a pandas dataframe.It has the following syntax.

Strings and dictionaries are the two most used data structures in Python.We use strings for text analysis in Python.On the other hand, a dictionary is used to store key-value pairs.In this article, we will discuss how to create a dictionary from a string in Python.Create a Dictionary From a String Using for Loop
To create a dictionary from a string in Python, we can use a python for loop.

The library csv42 applies the following general techniques to get a good performance.First important thing is to not optimize based on your assumptions, but based on measurements.In general, it is best to write your code optimized to be simple to read, understand, and maintain.Only when there turns out to be a performance issue, you can effectively pinpoint the bottleneck and try to improve the performance.

XML and YAML are two of the most used file formats in software engineering.Sometimes, we need to convert an XML file to YAML or vice versa.This article discusses how to convert XML string or file to YAML format in Python.What is XML Format?XML is a markup language used for encoding documents in a human and machine-readable format.

Trey Hunner Python 3.7-3.11*

How can you assign a variable in Python?An equals sign assigns in Python
In Python, the equal sign (=) assigns a variable to a value:
This is called an assignment statement.We've pointed the variable count to the value 4.
We don't have declarations or initializations
Some programming languages have an idea of declaring variables.

You started your journey through Python's main data structure categories in the first article in this series, which dealt with iterables.In this article, you'll focus on another term you'll often see in Python articles and documentation.You'll explore the Python sequence.'Sequence' is not the name of a single data type in Python.

We're happy to announce the release of tapir 1.0!After almost 4 years of development and multiple 0.x releases, the declarative, type-safe web endpoints library has reached the important milestone of a stable release.libraryDependencies += "com.softwaremill.sttp.tapir"%% "tapir-core" % "1.0.0" import sttp.tapir._

The bigger our database, the more we need to care about its performance.A common way of improving it is through indexes.Therefore, this article introduces the idea of indexes and implements them through Prisma.You can find the code from this article in this repository.Introduction to indexes
In one of the recent articles, we've created a posts table.

This post is a showcase of data wrangling techniques in Python, using glom.If you haven't heard of glom, it's a data transformation library and CLI designed for Python.Think HTML templating, but for objects, dicts, and other data structures.It's been almost five years since the first release of glom.

The malloc function in C is used to dynamically allocate memory at runtime.This means that you can request memory from the operating system when your program is running, instead of having to specify the amount of memory you need before the program starts.In simple terms, malloc is a function that allows you to create a block of memory of a specified size and returns a pointer to the first byte of that block.

We use different file formats to store and transmit data generated from software systems.Sometimes, we need to convert an XML file to JSON to communicate between two software.This article discusses how to convert an XML file or string into JSON format in Python.What is XML?XML stands for Extensible Markup Language.

The structuredClone function is a relatively new addition to the JavaScript language that was introduced in ECMAScript 2019 (ES10).It is similar to the JSON.stringify and JSON.parse methods in that it allows developers to serialize and deserialize objects, but with some important differences.The structuredClone function creates a deep copy of an object and its properties, including any child objects and functions, while preserving their type and behavior.

Many programs, especially those with user interaction, have functions to undo or redo processing steps.Implementation usually requires providing a mechanism that produces an opposite of a particular action.These functions have an impact on an underlying data structure.This Typescript module provides an undo class that can be used to implement a simple undo/redo mechanism in programs.

Microsoft published a beta release of TypeScript 5.0, the company's strongly typed JavaScript variant, on January 26.The new release aims to modernize decorators for class customization.Decorators, an upcoming ECMAScript feature, allow for customizing classes and their members in a reusable way, Microsoft noted in a blog post announcing the release.

TL;DR: Use  so you don't need to worry about all this identifier complexity.It's 7:15 am and customer support is swamped.We just got featured on Good Morning America, and a whole bunch of first time customers are bumping into bugs.A customer would fill a shopping cart with items, check out, pay for the items, and then be presented with an order receipt with all the wrong items!