In this video I'm going to show you how to start using pipenv for your python projects.

Pipenv is a packaging tool which automatically creates and manages virtualenv and packages.

# To create a new virtual environment
$ mkdir pipenv-demo && cd pipenv-demo
$ pipenv shell
(venv) $ cat Pipfile

# To install a package and …

In this video, I'll show how to use PyCharm Debugger to debug Chalice application in Windows.

Chalice is a framework develop Serverless application in Python, so that you can quickly create and deploy applications that use various AWS services like: Lambda, API Gateway etc.

$ mkdir chalice-debug && cd chalice-debug
$ python -m …

In this article, I'll show how to partially update JSON column using SQLAlchemy expressions in MySQL database.

Say, we have a table named TableName with a JSON column named JsonColumn and the values in this JSON column is in the following format;

{
    "JsonAttribute": 5,
    "AnotherJsonAttribute": "Hello"
}

SQL statement to update …

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.

Starting with the basic Flask project.

• Update requirements.txt file to include Flask-CORS and install the requirements

Flask
Flask-CORS

Option 1: Configuring globally …

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

• Create folder

$ mkdir ng-docker && cd ng-docker

• Create Dockerfile file

FROM node:12-alpine
LABEL AUTHOR="Arunkumar Dharuman"
WORKDIR /code
RUN npm install -g @angular/cli

• Create docker-compose.yaml file

version …

In this video I'll show how create a self-signed SSL certificate and configure it on Windows 10 machine. Using Angular CLI and self-signed SSL Certificate to serve application over HTTPS localhost.

Hope this helps!

In this post I will share the code to summarize a news article using Python's Natural Language Toolkit (NLTK)

For this example I'll be extracting an article from The Hindu using BeautifulSoup and summarize the article using word frequency distribution.

import requests
from bs4 import BeautifulSoup
from nltk.tokenize import …

I will show how to progressively add new rows to the table as the last row is being edited in Angular

In, app.component.html

<table class="progressive-table">
    <thead>
        <tr>
            <th>KEY</th>
            <th>VALUE</th>
            <th></th>
        </tr>
    </thead>
    <tbody>
    <tr *ngFor="let pair of pairs; let idx = index …

Detailed problem statement can be found here Gambler's Ruin

General solution to the problem is;

$1- a_1 = a_1 \sum\limits_{i = 1}^{k-1} \left(\frac{1 - p}{p}\right)^i$

For a fair game of $p = \frac{1}{2}$, $a_1 = \frac{1}{k}$

and, for an unfair game of $p …

f-strings is a short for "formatted strings", provides a convenient way to embed expressions inside string literals. This supports more formatting options than the old str.format() method supports.

Few examples;

String operation

>>> name = 'Arunkumar'
>>> f'My name is {name.upper()}'
'My name is ARUNKUMAR'

Float formatting

>>> import math
>>> f …