Coding For Entrepreneurs codingforentrepreneurs

Serverless Framework IAM Policy

Use this IAM policy for the Serverless Framework with the AWS Provider for deploying Node.js apps as serverless functions on AWS Lambda.

Replace AWS_ID with your AWS Account ID (e.g. 123456789) which you can find under AWS IAM in the console.

Django Custom Context Processors Example

In cfehome/context_processors.py add:

def my_context(request):
    # caching
    return {
 "my_var": "hello world"

I've been using cassandra a lot lately. It's very common to denote ID fields in cassanda as a time-based uuid field called timeuuid docs. In python, a timeuuuid is mearly uuid.uuid1 from the built-in uuid package.

Using the cassandra-driver, you might end up with a model like:

import uuid
from cassandra.cqlengine import columns
from cassandra.cqlengine.models import Model

Django for Jupyter

It's true packages exist to make it "easy" to use Django inside of a jupyter notebook. I seem to always run into issues successfully running these packages. I've found the below method useful although I cannot recall how I discovered how this works (aka attribution needed).

Requirements

Virtual Environment (virtualenv, venv, pipenv, etc)
Django installed & project created (we'll use the project name cfehome)
Jupyter installed at least in the virtual environment

	/*
	Next.js/Edge function method for hasing passwords
	Using the Web API Crypto feature instead of
	Built-in Node.js Crypto
	*/

	export default async function pbkdf2(password, salt, iterations, keylen) {
	const enc = new TextEncoder();
	const passwordBuffer = enc.encode(password);
	const saltBuffer = enc.encode(salt);

	export default async function isValidURL(url, disallowedDomains) {
	// Construct a regular expression pattern to match disallowed domains
	const disallowedPattern = `^https?:\\/\\/(?:${disallowedDomains.join('\|')})\\b`;
	let disallowedRegex = new RegExp(disallowedPattern, 'i');

	// Regular expression pattern to match a URL (excluding localhost)
	const urlPattern = /^(https?:\/\/)?((?!localhost)[\w.-]+)\.([a-z]{2,})(:\d{1,5})?(\/.*)?$/i;
	let urlRegex = new RegExp(urlPattern);

	// Test the URL against both URL pattern and disallowed domain pattern

	# Get version at https://knative.dev/docs/install/yaml-install/serving/install-serving-with-yaml/
	export KNATIVE_VERSION="v1.10.1" # ensure ISTIO install matches this version too

	# Install knative serving
	# Ref: https://knative.dev/docs/install/yaml-install/serving/install-serving-with-yaml/#install-the-knative-serving-component
	kubectl apply -f https://github.com/knative/serving/releases/download/knative-$KNATIVE_VERSION/serving-crds.yaml
	kubectl apply -f https://github.com/knative/serving/releases/download/knative-$KNATIVE_VERSION/serving-core.yaml


	# install istio

	# Video https://youtube.com/shorts/MNUdPGIjMPw
	# Python 3.10
	# pip install openai-whisper
	# pip install git+https://github.com/openai/whisper.git
	# install ffmpeg
	# brew install ffmpeg
	import subprocess
	import whisper
	model = whisper.load_model("base")

	from fractions import Fraction

	def number_str_to_float(amount_str:str) -> (any, bool):
	"""
	Take in an amount string to return float (if possible).

	Valid string returns:
	Float
	Boolean -> True