Forem: Vijay Soni

what to do after learning the basics of Python?🤔

Vijay Soni — Wed, 12 Apr 2023 04:42:20 +0000

Hello Guys!

Do you remember what is the output of the first code we wrote when we started learning to program? It was "Hello World". We said hello to the world of programming but we are still confused about what to do after learning the basics of any programming language like Python.
In this article, we are going to see what are the several fields that you can choose as your career path related to the Python language.

1. Web Development

If you're interested in the field of web development and excited to explore the world wide web then you're most welcome.
There are so many ways in which you can create a web application with the help of Python but the best way is to take the help of a framework based on the language Python.

Best web development frameworks of Python are Django, Flask, Cherrypy, and Fastapi.

So many free resources are available to learn web development with Python.

2. Game Development

Several game lovers have become developers just because of their passion for the world of games. This is another thing that you can do with the help of Python. Python has several libraries like Pygame, Pyglet, Arcade, etc. that allows you to create your games.

You can read the documentation and start creating games on your own.

3. Web Scraping

Today is the world of automation. If you want to automate your web-related tasks like gathering specific information from several entries from a website then Python is here for you.

Libraries like BeautifulSoup, Requests and Scrapy helps you to write web scraping programs.

Web scraping is very helpful in today's world because everyone needs to collect information from websites. So you can do that and earn money because there's a lot of demand for web scrapers in the freelancing world.

4. Data Analysis and Visualization

Data analysis is a process of collecting, inspecting, and modeling data to discover useful information, make predictions, and more. Data analysis is closely related to data visualization, which deals with the graphical representation of data.

In Python, you’ll also find mature and well-established libraries for data analysis and data visualization. Here are some of them:
Bokeh, Matplotlib, Dash, Pandas,

5. Machine Learning

Machine learning can be the first step for someone interested in artificial intelligence. Machine learning studies algorithms that learn through experience. These algorithms build models based on samples of training data to make predictions and decisions.

Here are some of the most popular tools for doing machine learning with Python:
Keras, NLTK, PyTorch, scikit-learn, Tensorflow,

We have explored the most popular fields of work in Python, so which field are you going to choose to work in in the future write me in the comment section.
Thank you for reading this article 🖐.

Django Admin Tools for a model.

Vijay Soni — Sat, 30 Jul 2022 17:52:49 +0000

In this tutorial you will learn about some built in tools for a model in django admin and how to apply them.

Suppose we have a model Article.

# models.py

from django.db import models

class Article(models.Model):
    title = models.CharField(max_length=250)
    slug = models.SlugField(max_length=250)
    author = models.ForeignKey(User,
     on_delete=models.CASCADE,
     related_name='articles')
    body = models.TextField()
    published_on = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.title

and we want following functionalities in our admin site for this model.

We don't want to show only the string representation of the title field of the model. We also want to represent author and published_on on the model entry.
We would like to create filters to sort the entries of the model.
We would like to have a search on the article entries page to find the desired entry.
We would like to prepopulate the slug field of the model in the basis of title field.
We would like to order the entries of the model in desired format.

to do so we have simple ways by grace of django 🦄.

So let's get started!

1. Representing many fields of a model in the admin site.

to do this we have to go in the admin.py file and create a ModelAdmin for our Article model and set a list_display list.

# admin.py file
from django.contrib import admin
from .models import Article

class ArticleAdmin(admin.ModelAdmin):
    # displaying title, author and publish date.
    list_display = ['title', 'author', 'published_on']

admin.site.register(Article, ArticleAdmin)

now it will represent both author and published_on with the title of the model.

2. Creating filters to sort the model entries.

to do this we have to update our ArticleAdmin with list_filter.

# admin.py file
from django.contrib import admin
from .models import Article

class ArticleAdmin(admin.ModelAdmin):
    # displaying title, author and publish date.
    list_display = ['title', 'author', 'published_on']
    # creating filter to sort the entries by publish date.
    list_filter = ['published_on',]

admin.site.register(Article, ArticleAdmin)

You will see a filter has occurred on the right side which you can use to filter the model entries by publish date.

You can also create a filter to sort the articles by the author but it's not a good approach because if the number of users increases the filter will become longer than the all entries.

3. Creating the search bar.

To create a search bar we just have to add 'search_fields' in our 'ArticleAdmin' class.

# admin.py file
from django.contrib import admin
from .models import Article

class ArticleAdmin(admin.ModelAdmin):
    # displaying title, author and publish date.
    list_display = ['title', 'author', 'published_on']
    # creating filter to sort the entries by publish date.
    list_filter = ['published_on',]
    # creating the search bar.
    search_fields = ['title', 'body']

admin.site.register(Article, ArticleAdmin)

add the fields you want to search with in the search_fields list and you will see a search bar occurs on the top of the page.
You should not add a foreignkey field in this search_fields list because it does not support it.

4. Prepopulating slug in the basis of title.

We would like to get the slug automatically created in the basis of the title field. To do this we have to create a dictionary named prepopulated_fields in our ArticleAdmin.

# admin.py file
from django.contrib import admin
from .models import Article

class ArticleAdmin(admin.ModelAdmin):
    # displaying title, author and publish date.
    list_display = ['title', 'author', 'published_on']
    # creating filter to sort the entries by publish date.
    list_filter = ['published_on',]
    # creating the search bar.
    search_fields = ['title', 'body']
    # prepopulating slug in the basis of title.
    prepopulated_fields = {'slug': ('title',)}

admin.site.register(Article, ArticleAdmin)

now the slug field will be automatically generated by the title field.

5. Ordering the article entries by the publish date.

to do this we just have to add the fields which we want to sort in the ordering list of the ArticleAdmin.

# admin.py file
from django.contrib import admin
from .models import Article

class ArticleAdmin(admin.ModelAdmin):
    # displaying title, author and publish date.
    list_display = ['title', 'author', 'published_on']
    # creating filter to sort the entries by publish date.
    list_filter = ['published_on',]
    # creating the search bar.
    search_fields = ['title', 'body']
    # prepopulating slug in the basis of title.
    prepopulated_fields = {'slug': ('title',)}
    # ordering the model by the publish date.
    ordering = ['published_on',]

admin.site.register(Article, ArticleAdmin)

now you will see the option to order the articles by the publish date.

Extra tip 💡

If we want to show any field of the model with some operation or calculation we can create a dedicated method in the model and then call the method name in the list_display of the ModelAdmin.

for example if we want to show the first 50 characters of the body of the Article we could do it like this:

# models.py

from django.db import models

class Article(models.Model):
    title = models.CharField(max_length=250)
    slug = models.SlugField(max_length=250)
    author = models.ForeignKey(User,
     on_delete=models.CASCADE,
     related_name='articles')
    body = models.TextField()
    published_on = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.title

    def content(self):
        ''' represents the first 50 characters of the body 
        field.'''
        return f"{self.body[:50]} ..."

# admin.py file
from django.contrib import admin
from .models import Article

class ArticleAdmin(admin.ModelAdmin):
    # displaying title, author and publish date.
    list_display = ['title', 'content', 'author', 'published_on']
    # creating filter to sort the entries by publish date.
    list_filter = ['published_on',]
    # creating the search bar.
    search_fields = ['title', 'body']
    # prepopulating slug in the basis of title.
    prepopulated_fields = {'slug': ('title',)}
    # ordering the model by the publish date.
    ordering = ['published_on',]

admin.site.register(Article, ArticleAdmin)

that's done.

Thank you for reading my article.

My Favorite Django 🦄 Template Filters

Vijay Soni — Sun, 17 Jul 2022 08:46:54 +0000

🖐 Hello Guys!
In this tutorial you will become familiar my favorite django template filters.

1. Timesince

If you want to show the date-time-field of a django model in human familiar term you can use this filter like this:

{{ field_date|timesince }}

and it will return you the time like 2 days ago format

2. Linebreaks

If you want to show the text of a field of a django model as you write in the form (with spaces, and tabs) you could use this filter in template like this:

{{ value|linebreaks }}

3. Truncatewords

If you want to display the first n words of a django model field in the template you can use this filter. For example if you want to show the first two words of the text you can use the filter like this:

{{ text|truncatewords:2 }}

and the output will be like Hello Python ...

4. Urlize

If you want to make an url active of the text of a django model field you can use this template filter like this:

{{ text|urlize }}

5. Wordcount

If you want to show the number of words of a django model field in the template you can use this filter like this:

{{ text|wordcount }}

and it will return the number of the words in the template

6. Title

If you want to show the text of a django model field in Title Case you can use this template filter like this:

{{ text|title }}

You can use |upper and |lower for respectively UPPER CASE and lower case.

for a detail knowledge of django template filters and tags you can visit djangotemplatetagsandfilters.com

👍Thank you for reading my post!

How to customize Django Admin site by itself ?

Vijay Soni — Sun, 10 Jul 2022 09:44:32 +0000

Hello Developers✌,
In this tutorial you are going to learn how you can customize Django Admin site by itself.

First install 3rd party package called django-admin-interface

pip install django-admin-interface

Add package to installed apps in settings.py file.

# project/settings.py

INSTALLED_APPS = [
    # Add package before the django.contrib.admin
    'admin_interface',
    'colorfield',

    # django apps
    'django.contrib.admin',
    ...
]

Add following at bottom of settings.py file.

X_FRAME_OPTIONS = "SAMEORIGIN"
SILENCED_SYSTEM_CHECKS = ["security.W019"]

Run migrate to apply migrations.

py manage.py migrate

then collect the static files.

py manage.py collectstatic

If you do not have configured static settings then update your settings.py file like following.

STATIC_URL = '/static/'
STATICFILES_DIRS = (str(BASE_DIR.joinpath('static')),)
STATIC_ROOT = str(BASE_DIR.joinpath('staticfiles'))
STATICFILES_FINDERS = [
"django.contrib.staticfiles.finders.FileSystemFinder",
"django.contrib.staticfiles.finders.AppDirectoriesFinder",
]

then run the server.

py manage.py runserver

Go to localhost:8000/admin

Click on the themes model.

click on the django entry to update the admin interface.

You will see there are so many options to update the UI.

Change the colors, title, logo, etc. as you like.

How to show images of the model in Django Admin?

Vijay Soni — Tue, 05 Jul 2022 12:51:47 +0000

In this tutorial you will learn how to show image of a django model in the django's admin site.

Suppose we have a model of image in our django website.


 python
# models.py
class Image(models.Model):
    name = models.CharField(max_length=250)
    image = models.ImageField(upload_to='images/')

    def __str__(self):
        return self.name

And we want that the both fields of the model Image should be shown in our website's admin site.

But if we directly say django admin to show the image in the admin by list_display in admin.py it gives us the url of the image , it does not show the image there.



# admin.py
from django.contrib import admin
from .models import Image
class ImageAdmin(admin.ModelAdmin):
    list_display = ['name', 'image',]

admin.site.register(Image, ImageAdmin)

So this is not a good approach to do that so we have a quick fix to solve this problem.



# admin.py
from django.utils.html import format_html

class ImageAdmin(admin.ModelAdmin):

    def image_tag(self, obj):
        return format_html('<img src="{}" style="max-width:200px; max-height:200px"/>'.format(obj.image.url))

    list_display = ['name','image_tag',]

admin.site.register(Image, ImageAdmin)

You must check if the static and media settings are included in our project/urls.py (main urls file) or not.



# project/urls.py
from django.conf import settings 
from django.conf.urls.static import static
from django.urls import path,
urlpatterns = [
    ...
    '''your urlpatterns'''
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

that's done.

Thank you for reading my post!