Code Explainers

Code explainers tagged #blueprints

python 
from flask import Blueprint, render_template, request, redirect, url_for, flash, abort
from .models import User, AuditLog
from .extensions import db
from .decorators import admin_required

Nesting Flask Blueprints for an admin panel

blueprints route-guards pagination
Intermediate 8 steps
python 
import os
from uuid import uuid4
 
from flask import Blueprint, current_app, jsonify, request, url_for

How a Flask image upload endpoint works

file-upload validation image-processing
Intermediate 9 steps
python 
from flask import Blueprint, render_template, redirect, url_for, session, request
from wtforms import Form, StringField, SelectField, IntegerField
from wtforms.validators import DataRequired, Email, NumberRange
 

A multi-step signup wizard in Flask

blueprints session-state form-validation
Intermediate 10 steps
python 
from functools import wraps
 
from flask import Blueprint, abort, jsonify
from flask_login import current_user, login_required

Building an admin-only decorator in Flask

decorators authorization access-control
Intermediate 7 steps
python 
import smtplib
from email.message import EmailMessage
from threading import Thread
 

Sending welcome emails off the request thread in Flask

background-threads app-context email
Intermediate 8 steps
python 
from flask import Blueprint, request, url_for, jsonify, abort
from flask.views import MethodView
 
from .models import Article, db

Building a paginated JSON API with Flask MethodView

rest-api pagination class-based-views
Intermediate 10 steps
python 
from flask import Blueprint, render_template, request, redirect, url_for, flash
from werkzeug.security import check_password_hash
 
from .models import User, db

A change-email route in Flask

blueprints form-validation password-hashing
Intermediate 8 steps
python 
from flask import Blueprint, jsonify, request, abort
 
v1 = Blueprint("users_v1", __name__)
v2 = Blueprint("users_v2", __name__)

Versioning a Flask API with Blueprints

api versioning blueprints rest
Intermediate 7 steps
python 
from flask import Blueprint, jsonify, request, abort
from flask_caching import Cache
 
cache = Cache(config={"CACHE_TYPE": "RedisCache", "CACHE_REDIS_URL": "redis://localhost:6379/0"})

Custom cache keys for Flask endpoints

caching redis cache-invalidation
Intermediate 7 steps
python 
import os
import uuid
 
from flask import Blueprint, current_app, jsonify, request

Handling secure file uploads in Flask

file-upload validation blueprints
Intermediate 8 steps
python 
import logging
import traceback
 
from flask import Blueprint, jsonify, request

Centralized JSON error handling in Flask

error-handling blueprints json-api
Intermediate 5 steps
python 
from flask import Blueprint, jsonify, request, abort
 
from .models import Article, db
from .schemas import article_schema, articles_schema

Building a REST articles API with Flask Blueprints

rest-api blueprints serialization
Intermediate 7 steps
python 
from flask import Blueprint, render_template, redirect, url_for, flash
from flask_login import login_required, current_user
from flask_wtf import FlaskForm
from wtforms import StringField, TextAreaField, SubmitField

Handling a post form with a Flask Blueprint

blueprints form-validation post-redirect-get
Intermediate 7 steps
python 
from flask import Blueprint, render_template, request, abort
from sqlalchemy import select
 
from .models import Article

Paginating articles in a Flask Blueprint

pagination blueprints input-validation
Intermediate 6 steps