teleren/devto huggingface dataset:
Power Duo: Flask and SQLAlchemy for Database Interactions
Published: 2023-10-17 07:27:34



In the world of web development with Python, Flask and SQLAlchemy form a powerful combination, enabling developers to build robust and scalable applications with ease. Flask provides a lightweight and flexible web framework, while SQLAlchemy offers a powerful and expressive way to interact with databases. In this blog post, we'll delve into how Flask seamlessly integrates with SQLAlchemy, unlocking the potential for efficient and organized database interactions.

**1. Setting the Stage: Flask and SQLAlchemy Installation:**

Before we dive into the intricacies of the integration, let's ensure we have Flask and SQLAlchemy installed. Use the following commands:

```bash
pip install Flask
pip install Flask-SQLAlchemy
```

**2. Configuration: Connecting Flask with SQLAlchemy:**

In your Flask application, import Flask and SQLAlchemy, and configure the database URI. This is where SQLAlchemy shines, supporting various database backends such as SQLite, MySQL, and PostgreSQL.

```python
from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'  # Example URI for SQLite
db = SQLAlchemy(app)
```

Replace the URI with the appropriate one for your chosen database.

**3. Creating a Model:**

In SQLAlchemy, a model represents a table in the database. Define your models as Python classes, inheriting from `db.Model`.

```python
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(20), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)

    def __repr__(self):
        return f"User('{self.username}', '{self.email}')"
```

**4. Creating and Migrating the Database:**

Once you've defined your models, it's time to create the database. Flask-Migrate is a helpful extension for managing database migrations.

```bash
pip install Flask-Migrate
```

In your application:

```python
from flask_migrate import Migrate

migrate = Migrate(app, db)
```

Now, you can run commands to initialize and apply migrations:

```bash
flask db init
flask db migrate -m "Initial migration"
flask db upgrade
```

**5. Interacting with the Database:**

With the database set up, you can easily perform CRUD operations using SQLAlchemy. For instance, to add a user:

```python
new_user = User(username='JohnDoe', email='john@example.com')
db.session.add(new_user)
db.session.commit()
```

And to query users:

```python
all_users = User.query.all()
```


Flask-SQLAlchemy simplifies the creating and management of db's. It provides additional features such as easy configuration through the Flask application and context-aware sessions. When combined it offers a seamless experience for web developers. Whether you're building a small application or a large-scale project, the Flask-SQLAlchemy duo empowers you to create efficient, maintainable, and scalable database-driven applications.
Umrah packages 2024
Published: 2023-10-17 07:19:35


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/f3m9wiqybhaf0niwohv7.png)



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**Phone:** 0203 930 0817
Best Image Sizes for Websites
Published: 2023-10-17 07:17:56

Images are the lifeblood of your website—they capture attention and boost SEO. But, finding the right size is key. In this ultimate guide, we'll break down the optimal image sizes for various elements of your website to strike the perfect balance between aesthetics and performance.

1. **Optimal File Size and Dimensions**
Images speak louder than words on the web, but their size matters too. Aim for an optimal file size of 200 KB. For full-screen backgrounds, target dimensions between 1500 and 2500 pixels wide. However, keep most images under 800 pixels max-width for efficient loading. It's all about finding the sweet spot! #WebDesign

2. **Best Header Image Size** 📸
Your website's header is a first impression. Optimal size: 1024 pixels wide. This fits well across most screens without sacrificing webpage speed. Remember, most websites have a resolution of 1024px x 768px. Strike the right balance between aesthetics and performance! #WebsiteHeaders

3. **Best Background Image Size** 🌄
Backgrounds set the tone for your website. Go for 1920x1080 pixels with a 16:9 ratio for a seamless fit. Keep pixels per inch (ppi) at least 72. Smaller file sizes are crucial for faster load times—optimize for both aesthetics and performance. #BackgroundImages #WebDesignTips

4. **Best Logo Image Size** 🎨
Logos are your brand's identity. Aim for 250x100 pixels, or a max of 320x70-100 pixels. For "retina" logos, double these dimensions. On mobile? Keep it between 320-500 pixels for the perfect fit. Choose wisely, as logo size directly impacts brand visibility! #LogoDesign #WebDev

5. **Best Image Format for Web** 📎
Choose the right format for different purposes. JPG for photos, PNG/SVG for logos & illustrations. WordPress users, be mindful of SVG limitations—consider the SVG Support plugin. The right format ensures fast loading without compromising quality. #ImageFormats #WebDevelopment

6. **PNG vs. JPG for Web** 🌐
PNGs are larger but support transparency and offer higher quality. Use JPGs for most images, but for transparency or high quality, opt for PNG. Keep PNG sizes in check and leverage compression tools for faster loading times. It's a balancing act! #WebDesignTips

7. **How to Make Photos Load Faster** ⚡
Resize images to the right dimensions before loading. Compression tools like Optimazilla or TinyJPG can reduce file size without compromising quality. Faster load times lead to a better user experience. Prioritize efficiency! #WebsiteOptimization

8. **Why Load Speed Matters** 🚀
Slow pages equal higher bounce rates. Visitors leave for faster sites, impacting SEO. Google rewards speedy sites with better rankings. Prioritize load speed for a healthier, high-performing website! #PageSpeed #SEO

Remember, finding the sweet spot for image sizes ensures a visually appealing website without compromising performance. Balance is key! #WebDesign #ImageOptimization
C54 C54comnet
Published: 2023-10-17 07:13:26

C54 C54comnet - Điểm Đến Hàng Đầu Cho Trải Nghiệm Cá Cược Trực Tuyến
Trong thế giới sôi động của cá cược trực tuyến, C54  nổi lên như một ngôi sao sáng giữa hàng ngàn nhà cái khác. Với hơn một thập kỷ hoạt động trong lĩnh vực này, C54 đã xây dựng một danh tiếng vững chắc về sự chuyên nghiệp, sự tin cậy và sự đổi mới không ngừng.
Đội ngũ chuyên nghiệp và tận tâm của C54 đảm bảo rằng người chơi được trải nghiệm cá cược trực tuyến tốt nhất có thể. Trang web của họ được thiết kế một cách tinh tế và dễ sử dụng, đảm bảo rằng cả những người chơi mới và kỳ cựu đều có thể tìm hiểu một cách dễ dàng.
Một trong những yếu tố quan trọng khi lựa chọn một nhà cái là lựa chọn trò chơi. C54 tự hào là một trung tâm cá cược đa dạng, với hàng trăm trò chơi khác nhau, từ cược thể thao, sòng bài trực tuyến đến poker và nhiều trò chơi khác. Điều này đảm bảo rằng có sự phong phú cho tất cả người chơi, không kể họ đang tìm kiếm giải trí nhẹ nhàng hay trải nghiệm cảm giác hồi hộp.
Khách hàng của C54 còn được hưởng những khuyến mãi và ưu đãi hấp dẫn. Họ cung cấp các khoản thưởng chào mừng hậu hĩnh, chương trình thưởng cho người chơi thường xuyên, và nhiều ưu đãi độc quyền khác. Điều này giúp tăng giá trị cho mỗi đồng đầu tư của người chơi.
Ngoài ra, C54 cũng chú trọng đến sự bảo mật và công bằng. Họ sử dụng công nghệ mã hóa hàng đầu để đảm bảo thông tin cá nhân của người chơi được bảo vệ tốt nhất. Đồng thời, tất cả trò chơi được giám sát một cách nghiêm ngặt để đảm bảo tính công bằng và minh bạch.
Với tất cả những ưu điểm này, C54 thực sự là một địa chỉ hàng đầu cho những người yêu thích cá cược trực tuyến. Hãy đặt cược và trải nghiệm sự thú vị tại C54 ngay hôm nay và bạn sẽ khám phá ra tại sao họ luôn được đánh giá cao.
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How to Measure and Improve Test Coverage in Projects?
Tags: testcoverage, testautomation, functionaltesting, unittesting
Published: 2023-10-17 07:09:58

Software release involves two critical phases: development and testing. Development phase involves the developers to write the necessary codes to create the intended functionalities while testing ensures the application quality remains uncompromised. Furthermore, testing removes critical bugs from the application and ensure user requirements are met. Test coverage is a key metric that helps project teams assess the effectiveness of the testing efforts.

Read More @ https://tenjinonline.com/how-to-measure-and-improve-test-coverage-in-projects/
Radiant Hair, Boundless Energy: Embrace the Hair Energy Revolution
Published: 2023-10-17 07:02:22

Join the revolution of radiant hair and boundless energy with our revolutionary [Hair shampoo ](https://www.rankaza.com/hair-health-challenges-black-hair-shampoo-solutions/)solutions! Immerse yourself in a world of luxurious treatments, scientifically formulated to awaken the energy within your hair.
Address: Walton Road, Nishtar Town, Lahore
Resguardo Compartido: Órdenes de Protección Mutua en Nueva Jersey
Published: 2023-10-17 06:53:09

Las [Órdenes Protección Mutua Nueva Jersey](https://srislaw.com/ordenes-proteccion-mutua-nueva-jersey/), también conocidas como órdenes de restricción, ofrecen una protección legal vital para ambas partes en situaciones conflictivas. Emitidas por un tribunal, prohíben el contacto o acoso entre las partes, proporcionando un amortiguador crucial para disipar conflictos. Estas órdenes son instrumentales para garantizar la seguridad y el bienestar de todas las partes mientras se llevan a cabo los procedimientos legales. Es imperativo comprender los criterios y el proceso para obtener una Orden de Protección Mutua, ya que sirve como una herramienta potente para mantener la paz y la seguridad en situaciones complejas.
D&D Healthy Homes LTD
Published: 2023-10-17 06:40:30

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Email: desiree@ddhealthyhomes.com

Phone No. 7809290915

Address: 4506 50A ave, beaumont, Alberta, t4X 1J2, Canada
Steel Valve Manufacturer in India
Tags: specialityvalve, valvemanufacturerineurope, steelvalvemanufacturer
Published: 2023-10-17 06:21:17

Specialityvalve is the topmost [Steel valve manufacturer in India. ](https://www.specialityvalve.com/product-category/forged-steel-globe-valve/)
We supply to Maharashtra, Karnataka and Gujarat. Steel valves are crucial components in various industries, playing a pivotal role in controlling the flow of liquids, gases, and other fluids within a system. Their robust construction, versatility, and reliable performance make them indispensable for applications ranging from industrial processes to residential plumbing systems. In this detailed overview, we will delve into the characteristics, types, applications, and benefits of steel valves. Specialityvalve is the topmost [Steel valve manufacturer in India.](https://www.specialityvalve.com/product-category/forged-steel-globe-valve/) We supply high quality steel valves for various industrial applications.

**Characteristics:**
•	Material Strength
•	Corrosion Resistance
•	Temperature Range
•	Versatility

**Types:**
•	Ball Valves
•	Gate Valves
•	Butterfly Valves
•	Globe Valves: 
•	Check Valves

**Applications:**
•	Oil and Gas Industry
•	Power Generation
•	Water Treatment
•	Chemical Processing

**Benefits:**
•	Durability
•	Reliability
•	High Performance
•	Safety
•	Low Maintenance

**Description:**
•	Body: Cast steel (WCB, WCC, WC6, LCC, LCB), Carbon steel (CF8, CF8M), Stainless steel (SS304, SS316, A105, F304, F304L, F316, F316L).
•	Class: 150-2500,
•	PN 10 – PN450.
•	Size: ½” to 48”.
•	Ends: Socket weld, butt weld, flanged, threaded, wafer, lug
•	Operation: Pneumatic, Electric, Handwheel Operated

[https://www.specialityvalve.com/product-category/forged-steel-globe-valve/](https://www.specialityvalve.com/product-category/forged-steel-globe-valve/
)
Configuring Host names & Name resolution
Tags: redhat, rhcs, tutorial
Published: 2023-10-17 06:15:17

**1. Changing the System Hostname**

We can display the hostname or temporarily modify the systems' fully qualified hostname using the hostname command. 

```
[root@servera ~]# hostname
servera.lab.example.com
```

The static hostname is normally specified in the **/etc/hostname** file. To edit the hostname we can use **hostnamectl** command.

```
[root@servera ~]# hostname
servera.lab.example.com

[root@servera ~]# hostnamectl set-hostname node1.example.com
node1.example.com
```

**2. Configure Name Resolution**

Name resolution, in the context of computer networking, is the process of translating human-readable domain names into IP addresses. This is a fundamental aspect of how the internet works because it allows us to access websites and services using easy-to-remember domain names like "www.example.com" instead of numeric IP addresses like "192.168.1.1."

The stub resolver is used to convert host names to IP addresses or the reverse. It determines where to look based on the configuration of the **/etc/nsswitch.conf** file. By default, the contents of the **/etc/hosts** file are checked first. 

In case an entry isn't found within the **/etc/hosts** record, by default the stub resolver tries to see up the hostname by using a DNS nameserver. The **/etc/resolv.conf** file controls how this query is performed:

 - search: a list of domain names to try with a short hostname. Both this and the domain should not
be set in the same file; if they are, the last instance wins. 
 - nameserver: the IP address of a nameserver to query. Up to three nameserver directives may be given to provide backups if one is down.

```
[root@servera ~]# cat /etc/resolv.conf
# Generated by NetworkManager
domain example.com
search example.com
nameserver 172.25.254.254
```

NetworkManager updates the **/etc/resolv.conf** file using DNS settings in the connection configuration files. Use the nmcli to modify the connections. 

```
[root@servera ~]# nmcli con mod ID ipv4.dns IP
[root@servera ~]# nmcli con down ID
[root@servera ~]# nmcli con up ID
[root@servera ~]# cat /etc/sysconfig/network-scripts/ifcfg-ID
...output omitted...
DNS1=8.8.8.8
...output omitted...
```

The default behavior of **nmcli con mod ID ipv4.dns IP** is to replace any previous DNS settings with the new IP list provided. A **+** or **-** symbol in front of the ipv4.dns argument adds or removes an individual entry.

```
[root@servera ~]# nmcli con mod ID +ipv4.dns IP
```

**3. Testing DNS Name Resolution**

`hostname` command can be used to test DNS connectivity. 

```
[root@servera ~]# host servera.lab.example.com
servera.lab.example.com has address 172.25.254.254
[root@servera ~]# host 172.25.254.254
254.254.25.172.in-addr.arpa domain name pointer servera.lab.example.com.
```
Hoisting in JavaScript
Tags: webdev, javascript, beginners, interview
Published: 2023-10-17 06:11:01

Hoisting is a JavaScript behavior where variable and function declarations are moved to the top of their containing scope during the compilation phase, before the code is executed. This means that, in code, you can use a variable or call a function before it's declared in the source code, and JavaScript will still work. However, there are some nuances to hoisting that you should understand:

### Variable Hoisting

When you declare a variable using `var`, it gets hoisted to the top of its containing function or global scope. However, only the declaration is hoisted, not the initialization. This means that the variable is created and initialized with `undefined`.
```js
console.log(x); // undefined
var x = 5;

```
Behind the scenes, this is how the code is interpreted:

```js
var x; // Declaration is hoisted
console.log(x); // undefined
x = 5; // Initialization happens here


```


### Function Hoisting

Function declarations are also hoisted in JavaScript. You can call a function before it's declared in the code.

```js
foo(); // "Hello, world!"

function foo() {
  console.log("Hello, world!");
}
```

The function declaration is hoisted to the top of its containing scope, so it's available for use even before the declaration in the code.

### Function Expressions

function expressions are not hoisted in the same way as function declarations. Only the variable declaration is hoisted, not the function assignment.

```js
bar(); // TypeError: bar is not a function

var bar = function () {
  console.log("Hi, there!");
};

```
in this case, the `var bar;` part is hoisted, but the assignment to a function only happens after the declaration in the code. So, trying to call `bar()` before the assignment results in an error.

### Block Scope Variable (let and const)

Variables declared with `let` and `const` are hoisted to the top of their containing block, but they are not initialized. Accessing them before their declaration in the code results in a `ReferenceError`
```js
console.log(y); // ReferenceError: Cannot access 'y' before initialization
let y = 10;
```

This is because `let` and `const` have block scope, so they are hoisted to the top of the block but are in a [[Temporal Dead Zone]] until they are initialized
hoisting in JavaScript is a mechanism where variable and function declarations are moved to the top of their containing scope during the compilation phase. It's essential to understand hoisting to avoid unexpected behavior in your code and to write more predictable and maintainable JavaScript programs.
The life of Vue app: Lifecycle Hooks♻️
Tags: vue, javascript, frontend, webdev
Published: 2023-10-17 06:01:00

## Overview
In Vue there are many steps of app's lifecycle, each Vue component instance goes through a series of initialization steps when it's created.
These steps called Lifecycle Hooks.
In this article will explains what are Lifecycle Hooks and how to use it.
Let's start! 🤙

## What are Lifecycle Hooks?
Lifecycle Hooks are  a series of initialization steps where it possbile to set up data observation, compile the template, mount the instance to the DOM, and update the DOM when data changes.


```javascript
<script setup>
import { onMounted } from 'vue'

onMounted(() =>  console.log("Hello mounted component!"))
</script>
```


In the above example the use of the `onMounted()` Hook is shown.
When the component is mounted, the code inside the callback given to `onMounted()` will be executed and print the message to the console.

---

## Diagram


![LifecycleDiagram.png](https://vuejs.org/assets/lifecycle.16e4c08e.png)

The above image is the official Vue diagram of Lifecycle Hooks where are illustrate the phases of Lifecycle:

1. `onBeforeMount()`, when this hook is called, the component has finished setting up its reactive state, but no DOM nodes have been created yet. It is about to execute its DOM render effect for the first time.
2. `onMounted()`: this hook is used for performing side effects that need access to the component's rendered DOM, or for limiting DOM-related code to the client in a server-rendered application.
3. `onBeforeUpdate()`: this hook can be used to access the DOM state before Vue updates the DOM.
4. `onUpdated()`: this hook is called after DOM update of the component, which can be caused by different state changes, because multiple state changes can be batched into a single render cycle for performance reasons. 
5. `onBeforeUnmount()`: when this hook is called, the component instance is still fully functional. 
6. `onUnmounted()`: use this hook to clean up manually created side effects such as timers, DOM event listeners or server connections.

`onBeforeMount()`, `onBeforeUpdate()`, `onBeforeUnmount()` and `onUnmounted()` are not called during server-side rendering. 

## Conclusion
Lifecycle Hooks are very powerful features to take advantage of when implementing components in a Vue application to manipulate the DOM, clean up dirty data, etc.
It is recommended to make good use of it.
Happy coding!✨

---

Hi👋🏻
My name is Domenico, software developer passionate of Vue.js framework, I write article about it for share my knowledge and experience.
Don't forget to visit my Linktree to discover my projects 🫰🏻

Linktree: https://linktr.ee/domenicotenace

Follow me on dev.to for other articles 👇🏻

{% embed https://dev.to/dvalin99 %}
GPT-3.5 Turbo Instruct with Node.js, Python, and MERN Stack for Advanced Web Applications”
Tags: webdev
Published: 2024-06-28 15:45:17

---
title: GPT-3.5 Turbo Instruct with Node.js, Python, and MERN Stack for Advanced Web Applications”
published: true
date: 2023-10-17 05:47:00 UTC
tags: WebDevelopment
canonical_url: 
---

OpenAI’s GPT-3.5 Turbo Instruct is the newest iteration in language model technology, designed to execute instructions with high precision. This article delves into the integration of GPT-3.5 Turbo Instruct across Node.js, Python, and React in a MERN stack. What is GPT-3.5 Turbo Instruct? As previously discussed in this article, GPT-3.5 Turbo Instruct, an advanced model, […]

The post [GPT-3.5 Turbo Instruct with Node.js, Python, and MERN Stack for Advanced Web Applications”](https://blog.nextideatech.com/gpt-3-5-turbo-instruct-with-node-js-python-and-mern-stack-for-advanced-web-applications/) appeared first on [Next Idea Tech Blog](https://blog.nextideatech.com).
Sustainable Dresses
Published: 2023-10-17 05:40:26



![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/pqd1fczqlxbj5xgn6xij.jpg)


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