pradeep
December 09, 2024
Joy of learning
First Blog The learning is an enjoyment. Moreover if you enjoy more you will learn more. And if you learn more you enjoy more To day I am writing about ternary operator in python. How it writes a code in a single line instead of writing 4- 5 lines of code. ✔ Consider a if statement : ##CODE## condition = True if condition: ....x = 1 else: ....x=0 print(x) ##endcode## Above code can be rewritten in python as : x=1 if condition else 0 print(x) ✌ Some times it is difficult to read large numbers we can use '_' without effecting the result num1 = 10000000000 num2 = 100000000 total = num1 + num2 print(total) num1 = 10_000_000_000 num2 = 10_000_000 total = num1 + num2 print(total) Both the code will give same result irrespective of placing an '_' in between If we want result to be formatted with '_' separator we can do so as: print(f'{total: ,}') *************************************** ::actvating venv in windows:: python3 -m venv venv venv\Scripts\activate.bat :::Building todo app indjango::: pip install django django-admin startproject todo cd todo python manage.py runserver ctr c python manage.py migrate python manage.py createsuperuser username email password password python manage.py runserver # Open website at local server 127.0.0.1:8000/admin # Enter username and password and we can ligin as user created # ctrl C to go to cmd prompt python manage.py startapp tasks # in sttings.py file add 'tasks' in installed_app # view.py from def index(requests): return HttpResponse('Hello World') create urls.py file in tasks tasks/urls.py from django.urls import path from . import views urlpatterns = [ path('', views.index) ] #in todo/urls.py file todo/urls.py from django.urls import path, include urlpatterns = [ .......... path('', include('tasks.urls') ] # In cmd prompt python manage.py runserver # local host at 8000 will serve views.py file # create folder templates in tasks folder and then create a tasks folder in templates ie >> tasks/templates/tasks make a file list.html in tasks folder templates/tasks/list.html <h3>To Do</h3> # models.py from django.db import models class = Task(models.Model): ........title = models.CharField(max_length = 200) ........complete = models.BooleanField(default = False) ........created = models.DateTimeField(auto_now_add = True) ........def __str__(self): ..............return self.title # Make migration and migrate #in commd prompt python manage.py makemigrations python manage.py migrate # Register in admin so that we access Task from admin admin.py from .models import * admin.site.register(Task) ##Goto admin panel add tasks #views.py from . models import * def index(request): ....tasks = Task.objects.all() ....context = {'tasks' : 'tasks'} ....return render(request, 'task/list.html', context) #task/list.html <h3>To Do</h3> {% for task in tasks %} ....<div> ......<p>{{ task }}</p> ....<div> {% endfor %}