Create Crud Operations in Laravel 10 with Tailwind CSS

In this Laravel and Tailwind CSS tutorial, we will learn about How to Create Crud Operations in Laravel 10 with Tailwind CSS. For tailwind css we will use laravel breeze. For laravel 10 you need php 8.1+ version.

Step 1: Install Laravel & Connect Database

Run below command to install laravel 10.

composer create-project laravel/laravel project-name

Now, you have to connect the laravel app to the database, hence open the .env configuration file and add the database credentials as suggested below.

.env

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=database_name
DB_USERNAME=database_user_name
DB_PASSWORD=database_password

Step 2: Install Breeze For Tailwind CSS

Install laravel breeze via composer

composer require laravel/breeze --dev

Next, run below command

php artisan breeze:install

Give 0 number to start with tailwind css blade file.

 Which stack would you like to install?
 blade .............................................. 0  
 react .............................................. 1  
 vue ................................................ 2  
 api ................................................ 3  
❯ 0

You can also add dark mode support and pest.

 Would you like to install dark mode support? (yes/no) [no]
❯ yes

 Would you prefer Pest tests instead of PHPUnit? (yes/no) [no]
❯ yes

Step 3: Create Model Migration Resource Controller & route

Run below command to create post model migration controller

php artisan make:model Post -mcr

2023_02_21_144535_create_posts_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::create('posts', function (Blueprint $table) {
            $table->id();
            $table->string('title');
            $table->string('slug');
            $table->text('content');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('posts');
    }
};

 

And migrate database:

php artisan migrate

 

app/Models/Post.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    use HasFactory;

    protected $fillable = [
        'title',
        'slug',
        'content',
    ];

}

Before add CRUD Operation logic in PostController. you need import use Illuminate\View\View; and give index, create, show, edit to View type laravel 10 support type system so you need to create correct type otherwise you get error message.

app/Http/Controllers/PostController.php

<?php

namespace App\Http\Controllers;

use App\Models\Post;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\View\View;


class PostController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index(): View
    {
        $posts = Post::latest()->paginate(10);

        return view('posts.index', compact('posts'));
    }

    /**
     * Show the form for creating a new resource.
     */
    public function create(): View
    {
        return view('posts.create');
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(Request $request): RedirectResponse
    {
        $request->validate([
            'title' => 'required|string|max:255',
            'slug' => 'required|string|max:255',
            'content' => 'required'
        ]);
    
        Post::create([
            'title' => $request->title,
            'slug' => \Str::slug($request->slug),
            'content' => $request->content,
        ]);

        return redirect()->route('posts.index')->with('status', 'Post Created Successfully');
    }

    /**
     * Display the specified resource.
     */
    public function show(Post $post): View
    {
        return view('posts.show', compact('post'));
    }

    /**
     * Show the form for editing the specified resource.
     */
    public function edit(Post $post): View
    {
        return view('posts.edit', compact('post'));
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, Post $post): RedirectResponse
    {
        $request->validate([
            'title' => 'required|string|max:255',
            'slug' => 'required|string|max:255',
            'content' => 'required'
        ]);
        
        $post->title = $request->title;
        $post->slug = \Str::slug($request->slug);
        $post->content = $request->content;
        $post->save();

        return redirect()->route('posts.index')->with('status', 'Post Updated Successfully');
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(Post $post): RedirectResponse
    {
        $post->delete();

        return redirect()->route('posts.index')->with('status', 'Post Delete Successfully');
    }
}

 

web.php

<?php

use App\Http\Controllers\ProfileController;
use App\Http\Controllers\PostController;
use Illuminate\Support\Facades\Route;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/', function () {
    return view('welcome');
});

Route::get('/dashboard', function () {
    return view('dashboard');
})->middleware(['auth', 'verified'])->name('dashboard');

Route::middleware('auth')->group(function () {
    Route::get('/profile', [ProfileController::class, 'edit'])->name('profile.edit');
    Route::patch('/profile', [ProfileController::class, 'update'])->name('profile.update');
    Route::delete('/profile', [ProfileController::class, 'destroy'])->name('profile.destroy');
    Route::resource('posts', PostController::class);
});

require __DIR__.'/auth.php';

 

 

Step 4: Create Blade view file for CRUD

resources/views/posts/create.blade.php

<x-app-layout>
    <x-slot name="header">
        <h2 class="text-xl font-semibold leading-tight text-gray-800">
            {{ __('Post Create') }}
        </h2>
    </x-slot>

    <div class="py-12">
        <div class="mx-auto max-w-5xl sm:px-6 lg:px-8">
            <div class="overflow-hidden bg-white shadow-sm sm:rounded-lg">
                <div class="p-6 bg-white border-b border-gray-200">
                    <form method="POST" action="{{ route('posts.store') }}">
                        @csrf
                        <div class="mb-6">
                            <label class="block">
                                <span class="text-gray-700">Title</span>
                                <input type="text" name="title" class="block w-full mt-1 rounded-md" placeholder=""
                                    value="{{ old('title') }}" />
                            </label>
                            @error('title')
                                <div class="text-sm text-red-600">{{ $message }}</div>
                            @enderror
                        </div>
                        <div class="mb-6">
                            <label class="block">
                                <span class="text-gray-700">Slug</span>
                                <input type="text" name="slug" class="block w-full mt-1 rounded-md" placeholder=""
                                    value="{{ old('slug') }}" />
                            </label>
                            @error('slug')
                                <div class="text-sm text-red-600">{{ $message }}</div>
                            @enderror
                        </div>
                        <div class="mb-6">
                            <label class="block">
                                <span class="text-gray-700">Content</span>
                                <textarea id="editor" class="block w-full mt-1 rounded-md" name="content" rows="3">{{ old('content') }}</textarea>
                            </label>
                            @error('content')
                                <div class="text-sm text-red-600">{{ $message }}</div>
                            @enderror
                        </div>
                        <x-primary-button type="submit">
                            Submit
                        </x-primary-button>

                    </form>
                </div>
            </div>
        </div>
    </div>
</x-app-layout>

 

 

resources/views/posts/index.blade.php

<x-app-layout>
    <x-slot name="header">
        <h2 class="text-xl font-semibold leading-tight text-gray-800">
            {{ __('Posts') }}
        </h2>
    </x-slot>

    <div class="py-12">
        <div class="mx-auto max-w-5xl sm:px-6 lg:px-8">
            <div class="overflow-hidden bg-white shadow-sm sm:rounded-lg">
                <div class="p-6 bg-white border-b border-gray-200">
                    @if (session()->has('status'))
                    <div class="flex justify-center items-center">

                        <p class="ml-3 text-sm font-bold text-green-600">{{ session()->get('status') }}</p>
                    </div>
                    @endif

                    <div class="mt-1 mb-4">

                        <x-primary-button>
                            <a href="{{ route('posts.create') }}">{{ __('Add Post') }}</a>
                        </x-primary-button>
                    </div>
                    <div class="relative overflow-x-auto shadow-md sm:rounded-lg">
                        <table class="w-full text-sm text-left text-gray-500 dark:text-gray-400">
                            <thead
                                class="text-xs text-gray-700 uppercase bg-gray-50 dark:bg-gray-700 dark:text-gray-400">
                                <tr>
                                    <th scope="col" class="px-6 py-3">
                                        #
                                    </th>
                                    <th scope="col" class="px-6 py-3">
                                        Title
                                    </th>
                                    <th scope="col" class="px-6 py-3">
                                        Edit
                                    </th>
                                    <th scope="col" class="px-6 py-3">
                                        Delete
                                    </th>
                                </tr>
                            </thead>
                            <tbody>
                                @foreach ($posts as $post)
                                <tr class="bg-white border-b dark:bg-gray-800 dark:border-gray-700">
                                    <th scope="row"
                                        class="px-6 py-4 font-medium text-gray-900 dark:text-white whitespace-nowrap">
                                        {{ $post->id }}
                                    </th>
                                    <td class="px-6 py-4">
                                        {{ $post->title }}

                                    </td>
                                    <td class="px-6 py-4">
                                        <a href="{{ route('posts.edit', $post->id) }}">Edit</a>
                                    </td>
                                    <td class="px-6 py-4">
                                        <form action="{{ route('posts.destroy', $post->id) }}" method="POST"
                                            onsubmit="return confirm('{{ trans('are You Sure ? ') }}');"
                                            style="display: inline-block;">
                                            <input type="hidden" name="_method" value="DELETE">
                                            <input type="hidden" name="_token" value="{{ csrf_token() }}">
                                            <input type="submit" class="px-4 py-2 text-white bg-red-700 rounded"
                                                value="Delete">
                                        </form>
                                    </td>
                                </tr>
                                @endforeach
                            </tbody>
                        </table>
                    </div>

                </div>
            </div>
        </div>
    </div>
</x-app-layout>

 

resources/views/posts/edit.blade.php

<x-app-layout>
    
    <x-slot name="header">
        <h2 class="text-xl font-semibold leading-tight text-gray-800">
            {{ __('Category Edit') }}
        </h2>
    </x-slot>

    <div class="py-12">
        <div class="mx-auto max-w-5xl sm:px-6 lg:px-8">
            <div class="overflow-hidden bg-white shadow-sm sm:rounded-lg">
                <div class="p-6 bg-white border-b border-gray-200">
                    <form method="POST" action="{{ route('posts.update',$post->id) }}">
                        @csrf
                        @method('put')
                        <div class="mb-6">
                            <label class="block">
                                <span class="text-gray-700">Title</span>
                                <input type="text" name="title"
                                    class="block w-full mt-1 rounded-md"
                                    placeholder="" value="{{old('title',$post->title)}}" />
                            </label>
                            @error('title')
                            <div class="text-sm text-red-600">{{ $message }}</div>
                            @enderror
                        </div>
                        <div class="mb-6">
                            <label class="block">
                                <span class="text-gray-700">Slug</span>
                                <input type="text" name="slug"
                                    class="block w-full mt-1 rounded-md"
                                    placeholder="" value="{{old('slug',$post->slug)}}" />
                            </label>
                            @error('slug')
                            <div class="text-sm text-red-600">{{ $message }}</div>
                            @enderror
                        </div>
                        <div class="mb-6">
                            <label class="block">
                                <span class="text-gray-700">Content</span>
                                <textarea id="editor" class="block w-full mt-1 rounded-md" name="content"
                                    rows="3">{{ $post->content}}</textarea>
                            </label>
                            @error('content')
                            <div class="text-sm text-red-600">{{ $message }}</div>
                            @enderror
                        </div>

                        <x-primary-button type="submit">
                            Update
                        </x-primary-button>

                    </form>
                </div>
            </div>
        </div>
    </div>
</x-app-layout>

 

Step 5: Laravel Run Server with Vite

Run below command in terminal to serve laravel 10 app.

php artisan serve

Next, you need to open next terminal.

npm run dev
// or
npm run build 

Original article source at: https://larainfo.com

#laravel #tailwindcss 

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Buddha Community

PyTumblr: A Python Tumblr API v2 Client

PyTumblr

Installation

Install via pip:

$ pip install pytumblr

Install from source:

$ git clone https://github.com/tumblr/pytumblr.git
$ cd pytumblr
$ python setup.py install

Usage

Create a client

A pytumblr.TumblrRestClient is the object you'll make all of your calls to the Tumblr API through. Creating one is this easy:

client = pytumblr.TumblrRestClient(
    '<consumer_key>',
    '<consumer_secret>',
    '<oauth_token>',
    '<oauth_secret>',
)

client.info() # Grabs the current user information

Two easy ways to get your credentials to are:

1. The built-in interactive_console.py tool (if you already have a consumer key & secret)
2. The Tumblr API console at https://api.tumblr.com/console
3. Get sample login code at https://api.tumblr.com/console/calls/user/info

Supported Methods

User Methods

client.info() # get information about the authenticating user
client.dashboard() # get the dashboard for the authenticating user
client.likes() # get the likes for the authenticating user
client.following() # get the blogs followed by the authenticating user

client.follow('codingjester.tumblr.com') # follow a blog
client.unfollow('codingjester.tumblr.com') # unfollow a blog

client.like(id, reblogkey) # like a post
client.unlike(id, reblogkey) # unlike a post

Blog Methods

client.blog_info(blogName) # get information about a blog
client.posts(blogName, **params) # get posts for a blog
client.avatar(blogName) # get the avatar for a blog
client.blog_likes(blogName) # get the likes on a blog
client.followers(blogName) # get the followers of a blog
client.blog_following(blogName) # get the publicly exposed blogs that [blogName] follows
client.queue(blogName) # get the queue for a given blog
client.submission(blogName) # get the submissions for a given blog

Post Methods

Creating posts

PyTumblr lets you create all of the various types that Tumblr supports. When using these types there are a few defaults that are able to be used with any post type.

The default supported types are described below.

• state - a string, the state of the post. Supported types are published, draft, queue, private
• tags - a list, a list of strings that you want tagged on the post. eg: ["testing", "magic", "1"]
• tweet - a string, the string of the customized tweet you want. eg: "Man I love my mega awesome post!"
• date - a string, the customized GMT that you want
• format - a string, the format that your post is in. Support types are html or markdown
• slug - a string, the slug for the url of the post you want

We'll show examples throughout of these default examples while showcasing all the specific post types.

Creating a photo post

Creating a photo post supports a bunch of different options plus the described default options * caption - a string, the user supplied caption * link - a string, the "click-through" url for the photo * source - a string, the url for the photo you want to use (use this or the data parameter) * data - a list or string, a list of filepaths or a single file path for multipart file upload

#Creates a photo post using a source URL
client.create_photo(blogName, state="published", tags=["testing", "ok"],
                    source="https://68.media.tumblr.com/b965fbb2e501610a29d80ffb6fb3e1ad/tumblr_n55vdeTse11rn1906o1_500.jpg")

#Creates a photo post using a local filepath
client.create_photo(blogName, state="queue", tags=["testing", "ok"],
                    tweet="Woah this is an incredible sweet post [URL]",
                    data="/Users/johnb/path/to/my/image.jpg")

#Creates a photoset post using several local filepaths
client.create_photo(blogName, state="draft", tags=["jb is cool"], format="markdown",
                    data=["/Users/johnb/path/to/my/image.jpg", "/Users/johnb/Pictures/kittens.jpg"],
                    caption="## Mega sweet kittens")

Creating a text post

Creating a text post supports the same options as default and just a two other parameters * title - a string, the optional title for the post. Supports markdown or html * body - a string, the body of the of the post. Supports markdown or html

#Creating a text post
client.create_text(blogName, state="published", slug="testing-text-posts", title="Testing", body="testing1 2 3 4")

Creating a quote post

Creating a quote post supports the same options as default and two other parameter * quote - a string, the full text of the qote. Supports markdown or html * source - a string, the cited source. HTML supported

#Creating a quote post
client.create_quote(blogName, state="queue", quote="I am the Walrus", source="Ringo")

Creating a link post

• title - a string, the title of post that you want. Supports HTML entities.
• url - a string, the url that you want to create a link post for.
• description - a string, the desciption of the link that you have

#Create a link post
client.create_link(blogName, title="I like to search things, you should too.", url="https://duckduckgo.com",
                   description="Search is pretty cool when a duck does it.")

Creating a chat post

Creating a chat post supports the same options as default and two other parameters * title - a string, the title of the chat post * conversation - a string, the text of the conversation/chat, with diablog labels (no html)

#Create a chat post
chat = """John: Testing can be fun!
Renee: Testing is tedious and so are you.
John: Aw.
"""
client.create_chat(blogName, title="Renee just doesn't understand.", conversation=chat, tags=["renee", "testing"])

Creating an audio post

Creating an audio post allows for all default options and a has 3 other parameters. The only thing to keep in mind while dealing with audio posts is to make sure that you use the external_url parameter or data. You cannot use both at the same time. * caption - a string, the caption for your post * external_url - a string, the url of the site that hosts the audio file * data - a string, the filepath of the audio file you want to upload to Tumblr

#Creating an audio file
client.create_audio(blogName, caption="Rock out.", data="/Users/johnb/Music/my/new/sweet/album.mp3")

#lets use soundcloud!
client.create_audio(blogName, caption="Mega rock out.", external_url="https://soundcloud.com/skrillex/sets/recess")

Creating a video post

Creating a video post allows for all default options and has three other options. Like the other post types, it has some restrictions. You cannot use the embed and data parameters at the same time. * caption - a string, the caption for your post * embed - a string, the HTML embed code for the video * data - a string, the path of the file you want to upload

#Creating an upload from YouTube
client.create_video(blogName, caption="Jon Snow. Mega ridiculous sword.",
                    embed="http://www.youtube.com/watch?v=40pUYLacrj4")

#Creating a video post from local file
client.create_video(blogName, caption="testing", data="/Users/johnb/testing/ok/blah.mov")

Editing a post

Updating a post requires you knowing what type a post you're updating. You'll be able to supply to the post any of the options given above for updates.

client.edit_post(blogName, id=post_id, type="text", title="Updated")
client.edit_post(blogName, id=post_id, type="photo", data="/Users/johnb/mega/awesome.jpg")

Reblogging a Post

Reblogging a post just requires knowing the post id and the reblog key, which is supplied in the JSON of any post object.

client.reblog(blogName, id=125356, reblog_key="reblog_key")

Deleting a post

Deleting just requires that you own the post and have the post id

client.delete_post(blogName, 123456) # Deletes your post :(

A note on tags: When passing tags, as params, please pass them as a list (not a comma-separated string):

client.create_text(blogName, tags=['hello', 'world'], ...)

Getting notes for a post

In order to get the notes for a post, you need to have the post id and the blog that it is on.

data = client.notes(blogName, id='123456')

The results include a timestamp you can use to make future calls.

data = client.notes(blogName, id='123456', before_timestamp=data["_links"]["next"]["query_params"]["before_timestamp"])

Tagged Methods

# get posts with a given tag
client.tagged(tag, **params)

Using the interactive console

This client comes with a nice interactive console to run you through the OAuth process, grab your tokens (and store them for future use).

You'll need pyyaml installed to run it, but then it's just:

$ python interactive-console.py

and away you go! Tokens are stored in ~/.tumblr and are also shared by other Tumblr API clients like the Ruby client.

Running tests

The tests (and coverage reports) are run with nose, like this:

python setup.py test

Author: tumblr
Source Code: https://github.com/tumblr/pytumblr
License: Apache-2.0 license

#python #api 

Laravel 8 CRUD Operation Example

Hello Friend,

As you know Laravel 8 already officially released and today I will show you how to create CRUD operation in laravel 8, I have already perform many CRUD operations in my previous post like CRUD operation in ajax, CRUD operation in laravel 6 etc. So, today I will give you laravel 8 CRUD application example.

Laravel 8 CRUD Operation Example

https://websolutionstuff.com/post/laravel-8-crud-operation-example

#laravel #php #laravel 8 crud operation example #crud operation #laravel 8 crud tutorial #crud operation in laravel 8

Laravel AJAX CRUD Example Tutorial

Hello Guys,

Today I will show you how to create laravel AJAX CRUD example tutorial. In this tutorial we are implements ajax crud operation in laravel. Also perform insert, update, delete operation using ajax in laravel 6 and also you can use this ajax crud operation in laravel 6, laravel 7. In ajax crud operation we display records in datatable.

Read More : Laravel AJAX CRUD Example Tutorial

https://www.techsolutionstuff.com/post/laravel-ajax-crud-example-tutorial

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Read Also : Read Also : Laravel 6 CRUD Tutorial with Example

https://techsolutionstuff.com/post/laravel-6-crud-tutorial-with-example

#laravel ajax crud example tutorial #ajax crud example in laravel #laravel crud example #laravel crud example with ajax #laravel #php

Exploring Mutable and Immutable in Python

In this Python article, let's learn about Mutable and Immutable in Python. 

Mutable and Immutable in Python

Mutable is a fancy way of saying that the internal state of the object is changed/mutated. So, the simplest definition is: An object whose internal state can be changed is mutable. On the other hand, immutable doesn’t allow any change in the object once it has been created.

Both of these states are integral to Python data structure. If you want to become more knowledgeable in the entire Python Data Structure, take this free course which covers multiple data structures in Python including tuple data structure which is immutable. You will also receive a certificate on completion which is sure to add value to your portfolio.

Mutable Definition

Mutable is when something is changeable or has the ability to change. In Python, ‘mutable’ is the ability of objects to change their values. These are often the objects that store a collection of data.

Immutable Definition

Immutable is the when no change is possible over time. In Python, if the value of an object cannot be changed over time, then it is known as immutable. Once created, the value of these objects is permanent.

List of Mutable and Immutable objects

Objects of built-in type that are mutable are:

• Lists
• Sets
• Dictionaries
• User-Defined Classes (It purely depends upon the user to define the characteristics) 

Objects of built-in type that are immutable are:

• Numbers (Integer, Rational, Float, Decimal, Complex & Booleans)
• Strings
• Tuples
• Frozen Sets
• User-Defined Classes (It purely depends upon the user to define the characteristics)

Object mutability is one of the characteristics that makes Python a dynamically typed language. Though Mutable and Immutable in Python is a very basic concept, it can at times be a little confusing due to the intransitive nature of immutability.

Objects in Python

In Python, everything is treated as an object. Every object has these three attributes:

• Identity – This refers to the address that the object refers to in the computer’s memory.
• Type – This refers to the kind of object that is created. For example- integer, list, string etc. 
• Value – This refers to the value stored by the object. For example – List=[1,2,3] would hold the numbers 1,2 and 3

While ID and Type cannot be changed once it’s created, values can be changed for Mutable objects.

Check out this free python certificate course to get started with Python.

Mutable Objects in Python

I believe, rather than diving deep into the theory aspects of mutable and immutable in Python, a simple code would be the best way to depict what it means in Python. Hence, let us discuss the below code step-by-step:

#Creating a list which contains name of Indian cities  

cities = [‘Delhi’, ‘Mumbai’, ‘Kolkata’]

# Printing the elements from the list cities, separated by a comma & space

for city in cities:
		print(city, end=’, ’)

Output [1]: Delhi, Mumbai, Kolkata

#Printing the location of the object created in the memory address in hexadecimal format

print(hex(id(cities)))

Output [2]: 0x1691d7de8c8

#Adding a new city to the list cities

cities.append(‘Chennai’)

#Printing the elements from the list cities, separated by a comma & space 

for city in cities:
	print(city, end=’, ’)

Output [3]: Delhi, Mumbai, Kolkata, Chennai

#Printing the location of the object created in the memory address in hexadecimal format

print(hex(id(cities)))

Output [4]: 0x1691d7de8c8

The above example shows us that we were able to change the internal state of the object ‘cities’ by adding one more city ‘Chennai’ to it, yet, the memory address of the object did not change. This confirms that we did not create a new object, rather, the same object was changed or mutated. Hence, we can say that the object which is a type of list with reference variable name ‘cities’ is a MUTABLE OBJECT.

Let us now discuss the term IMMUTABLE. Considering that we understood what mutable stands for, it is obvious that the definition of immutable will have ‘NOT’ included in it. Here is the simplest definition of immutable– An object whose internal state can NOT be changed is IMMUTABLE.

Again, if you try and concentrate on different error messages, you have encountered, thrown by the respective IDE; you use you would be able to identify the immutable objects in Python. For instance, consider the below code & associated error message with it, while trying to change the value of a Tuple at index 0. 

#Creating a Tuple with variable name ‘foo’

foo = (1, 2)

#Changing the index[0] value from 1 to 3

foo[0] = 3
	
TypeError: 'tuple' object does not support item assignment 

Immutable Objects in Python

Once again, a simple code would be the best way to depict what immutable stands for. Hence, let us discuss the below code step-by-step:

#Creating a Tuple which contains English name of weekdays

weekdays = ‘Sunday’, ‘Monday’, ‘Tuesday’, ‘Wednesday’, ‘Thursday’, ‘Friday’, ‘Saturday’

# Printing the elements of tuple weekdays

print(weekdays)

Output [1]:  (‘Sunday’, ‘Monday’, ‘Tuesday’, ‘Wednesday’, ‘Thursday’, ‘Friday’, ‘Saturday’)

#Printing the location of the object created in the memory address in hexadecimal format

print(hex(id(weekdays)))

Output [2]: 0x1691cc35090

#tuples are immutable, so you cannot add new elements, hence, using merge of tuples with the # + operator to add a new imaginary day in the tuple ‘weekdays’

weekdays  +=  ‘Pythonday’,

#Printing the elements of tuple weekdays

print(weekdays)

Output [3]: (‘Sunday’, ‘Monday’, ‘Tuesday’, ‘Wednesday’, ‘Thursday’, ‘Friday’, ‘Saturday’, ‘Pythonday’)

#Printing the location of the object created in the memory address in hexadecimal format

print(hex(id(weekdays)))

Output [4]: 0x1691cc8ad68

This above example shows that we were able to use the same variable name that is referencing an object which is a type of tuple with seven elements in it. However, the ID or the memory location of the old & new tuple is not the same. We were not able to change the internal state of the object ‘weekdays’. The Python program manager created a new object in the memory address and the variable name ‘weekdays’ started referencing the new object with eight elements in it.  Hence, we can say that the object which is a type of tuple with reference variable name ‘weekdays’ is an IMMUTABLE OBJECT.

Also Read: Understanding the Exploratory Data Analysis (EDA) in Python

Where can you use mutable and immutable objects:

Mutable objects can be used where you want to allow for any updates. For example, you have a list of employee names in your organizations, and that needs to be updated every time a new member is hired. You can create a mutable list, and it can be updated easily.

Immutability offers a lot of useful applications to different sensitive tasks we do in a network centred environment where we allow for parallel processing. By creating immutable objects, you seal the values and ensure that no threads can invoke overwrite/update to your data. This is also useful in situations where you would like to write a piece of code that cannot be modified. For example, a debug code that attempts to find the value of an immutable object.

Watch outs:  Non transitive nature of Immutability:

OK! Now we do understand what mutable & immutable objects in Python are. Let’s go ahead and discuss the combination of these two and explore the possibilities. Let’s discuss, as to how will it behave if you have an immutable object which contains the mutable object(s)? Or vice versa? Let us again use a code to understand this behaviour–

#creating a tuple (immutable object) which contains 2 lists(mutable) as it’s elements

#The elements (lists) contains the name, age & gender 

person = (['Ayaan', 5, 'Male'], ['Aaradhya', 8, 'Female'])

#printing the tuple

print(person)

Output [1]: (['Ayaan', 5, 'Male'], ['Aaradhya', 8, 'Female'])

#printing the location of the object created in the memory address in hexadecimal format

print(hex(id(person)))

Output [2]: 0x1691ef47f88

#Changing the age for the 1st element. Selecting 1st element of tuple by using indexing [0] then 2nd element of the list by using indexing [1] and assigning a new value for age as 4

person[0][1] = 4

#printing the updated tuple

print(person)

Output [3]: (['Ayaan', 4, 'Male'], ['Aaradhya', 8, 'Female'])

#printing the location of the object created in the memory address in hexadecimal format

print(hex(id(person)))

Output [4]: 0x1691ef47f88

In the above code, you can see that the object ‘person’ is immutable since it is a type of tuple. However, it has two lists as it’s elements, and we can change the state of lists (lists being mutable). So, here we did not change the object reference inside the Tuple, but the referenced object was mutated.

Also Read: Real-Time Object Detection Using TensorFlow

Same way, let’s explore how it will behave if you have a mutable object which contains an immutable object? Let us again use a code to understand the behaviour–

#creating a list (mutable object) which contains tuples(immutable) as it’s elements

list1 = [(1, 2, 3), (4, 5, 6)]

#printing the list

print(list1)

Output [1]: [(1, 2, 3), (4, 5, 6)]

#printing the location of the object created in the memory address in hexadecimal format

print(hex(id(list1)))

Output [2]: 0x1691d5b13c8	

#changing object reference at index 0

list1[0] = (7, 8, 9)

#printing the list

Output [3]: [(7, 8, 9), (4, 5, 6)]

#printing the location of the object created in the memory address in hexadecimal format

print(hex(id(list1)))

Output [4]: 0x1691d5b13c8

As an individual, it completely depends upon you and your requirements as to what kind of data structure you would like to create with a combination of mutable & immutable objects. I hope that this information will help you while deciding the type of object you would like to select going forward.

Before I end our discussion on IMMUTABILITY, allow me to use the word ‘CAVITE’ when we discuss the String and Integers. There is an exception, and you may see some surprising results while checking the truthiness for immutability. For instance:
#creating an object of integer type with value 10 and reference variable name ‘x’ 

x = 10
 

#printing the value of ‘x’

print(x)

Output [1]: 10

#Printing the location of the object created in the memory address in hexadecimal format

print(hex(id(x)))

Output [2]: 0x538fb560

#creating an object of integer type with value 10 and reference variable name ‘y’

y = 10

#printing the value of ‘y’

print(y)

Output [3]: 10

#Printing the location of the object created in the memory address in hexadecimal format

print(hex(id(y)))

Output [4]: 0x538fb560

As per our discussion and understanding, so far, the memory address for x & y should have been different, since, 10 is an instance of Integer class which is immutable. However, as shown in the above code, it has the same memory address. This is not something that we expected. It seems that what we have understood and discussed, has an exception as well.

Quick check – Python Data Structures

Immutability of Tuple

Tuples are immutable and hence cannot have any changes in them once they are created in Python. This is because they support the same sequence operations as strings. We all know that strings are immutable. The index operator will select an element from a tuple just like in a string. Hence, they are immutable.

Exceptions in immutability

Like all, there are exceptions in the immutability in python too. Not all immutable objects are really mutable. This will lead to a lot of doubts in your mind. Let us just take an example to understand this.

Consider a tuple ‘tup’.

Now, if we consider tuple tup = (‘GreatLearning’,[4,3,1,2]) ;

We see that the tuple has elements of different data types. The first element here is a string which as we all know is immutable in nature. The second element is a list which we all know is mutable. Now, we all know that the tuple itself is an immutable data type. It cannot change its contents. But, the list inside it can change its contents. So, the value of the Immutable objects cannot be changed but its constituent objects can. change its value.

FAQs

1. Difference between mutable vs immutable in Python?

Mutable Object	Immutable Object
State of the object can be modified after it is created.	State of the object can’t be modified once it is created.
They are not thread safe.	They are thread safe
Mutable classes are not final.	It is important to make the class final before creating an immutable object.

2. What are the mutable and immutable data types in Python?

• Some mutable data types in Python are:

list, dictionary, set, user-defined classes.

• Some immutable data types are: 

int, float, decimal, bool, string, tuple, range.

3. Are lists mutable in Python?

Lists in Python are mutable data types as the elements of the list can be modified, individual elements can be replaced, and the order of elements can be changed even after the list has been created.
(Examples related to lists have been discussed earlier in this blog.)

4. Why are tuples called immutable types?

Tuple and list data structures are very similar, but one big difference between the data types is that lists are mutable, whereas tuples are immutable. The reason for the tuple’s immutability is that once the elements are added to the tuple and the tuple has been created; it remains unchanged.

A programmer would always prefer building a code that can be reused instead of making the whole data object again. Still, even though tuples are immutable, like lists, they can contain any Python object, including mutable objects.

5. Are sets mutable in Python?

A set is an iterable unordered collection of data type which can be used to perform mathematical operations (like union, intersection, difference etc.). Every element in a set is unique and immutable, i.e. no duplicate values should be there, and the values can’t be changed. However, we can add or remove items from the set as the set itself is mutable.

6. Are strings mutable in Python?

Strings are not mutable in Python. Strings are a immutable data types which means that its value cannot be updated.

Join Great Learning Academy’s free online courses and upgrade your skills today.

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Original article source at: https://www.mygreatlearning.com

#python 

How To Build an About Me Page With Laravel Sail and Tailwind CSS

Introduction

Laravel Sail is a Docker development environment included by default in Laravel since version 8. It allows you to quickly get a PHP development environment up and running, tailored for running Laravel applications with built-in support for NPM / Node.

In this guide, you’ll bootstrap a new Laravel application with Laravel Sail and create a styled “about me” landing page using Tailwind CSS, a utility-first CSS framework designed for rapidly building custom user interfaces. At the end, you’ll have a base that you can use to further develop a Laravel application using Tailwind CSS for the front end and Sail for the development environment.

Prerequisites

Although the code shared in this guide should work seamlessly across multiple environments and systems, the instructions explained here were tested within an Ubuntu 20.04 local system running Docker and Docker Compose. Regardless of your base operating system, here’s what you’ll need to set up in order to get started:

• Docker installed on your local machine. If you’re running Ubuntu 20.04, you can follow Steps 1 and 2 of How To Install and Use Docker on Ubuntu 20.04 to set it up. Windows and MacOS users need to install Docker Desktop instead.

• Docker Compose installed on your local machine. Docker Compose comes included by default with Docker Desktop for both Windows and MacOS systems, but Linux users need to install the Compose executable, following Step 1 of How To Install and Use Docker Compose on Ubuntu 20.04.

• A code editor for PHP (optional). A code editor helps making code easier to read and to format, and can improve your productivity by pointing out issues before you execute your code. You can follow our guide on How To Set Up Visual Studio Code for PHP Projects to set up VSCode, a free code editor, within your local development environment.

• Step 1 — Creating a New Laravel Application Using the Laravel Builder Script

• Step 2 — Using Laravel Sail

• Step 3 — Setting Up Tailwind CSS with Laravel

• Step 4 — Creating a Landing Page

• Step 5 — Styling Your Landing Page with Tailwind CSS

#tailwind css #laravel #css #tailwind