Flask code explainers

python

import csv
import io
from datetime import datetime

Streaming a CSV export in Flask

streaming generators csv

Intermediate 9 steps

python

import time
from collections import defaultdict
from threading import Lock

Sliding-window login rate limiting in Flask

rate-limiting sliding-window thread-safety

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

import hashlib
import hmac
import os

Verifying signed payment webhooks in Flask

hmac webhooks signature verification

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