DEV Community: Arunkumar Dharuman

Beginner's guide to @app.route() decorator in Flask

Arunkumar Dharuman — Sat, 14 May 2022 06:27:53 +0000

In this video, we'll see how to define and configure routes in Flask. Also, how to access HTTP Methods, Path param, Query param, Headers and Body of the Request and Response.

Source Code: https://github.com/CodePossibility/flask-route

fixed length queue

Arunkumar Dharuman — Sun, 20 Mar 2022 16:04:20 +0000

To create a fixed length queue and to discard old values as you and new values

from collections import deque

dq = deque(maxlen=5)

for i in range(10):
    dq.append(i)

print(dq)

Output:
deque([5, 6, 7, 8, 9], maxlen=5)

With 'defaultdict' you need not have to test existence of the key

Arunkumar Dharuman — Sat, 05 Mar 2022 00:22:41 +0000

Creating AWS S3 Presigned upload and download URL in Python using Boto3

Arunkumar Dharuman — Wed, 09 Feb 2022 02:33:43 +0000

In this video, I'm going to show how to create AWS S3 Presigned upload and download URL in python using boto3

You can find the code at below gist
https://gist.github.com/arundhaj/134775031ef916301c9aeff4c089466c

SQLAlchemy Expressions for Insert, Update and Delete in Python Flask

Arunkumar Dharuman — Thu, 03 Feb 2022 05:14:18 +0000

In this video I'm going to show you how to use SQLAlchemy Expressions for Insert, Update and Delete in Python Flask.

You can find the code at below gist
https://gist.github.com/arundhaj/51bcb0df82b5f27f25b54bfe4afb7651

Creating Beautiful REST APIs using Python Flask and Swagger UI

Arunkumar Dharuman — Sun, 20 Jun 2021 14:03:43 +0000

In this video I'm going to show you how to create RESTful APIs using Flask and document it by generating API specification in Open API aka Swagger format using apispec and configure Swagger UI.

You can find the app.py file code at: https://gist.github.com/arundhaj/5f4c0f8c9a8efba9f92f81adea9fd4d7

Definitive guide to solve CORS error, Access-Control-Allow-Origin in Python Flask APIs

Arunkumar Dharuman — Sat, 03 Oct 2020 01:21:32 +0000

In this video, I'll show how to enable Flask-CORS for Flask based API projects. Explains and code three different options available to configure CORS for your projects.

Python;
https://www.python.org

Flask;
https://flask.palletsprojects.com

Flask-CORS;
https://flask-cors.readthedocs.io

How to create and run Angular app using Docker without installing Node in the Host machine

Arunkumar Dharuman — Mon, 21 Sep 2020 01:28:09 +0000

In this video, I'll show how to create and run Angular app using Docker, without installing Node in the Host machine