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[tool.black]
line-length = 120
target_version = ['py37']
exclude = '''
(
  /(
      \.eggs         # exclude a few common directories in the
    | \.git          # root of the project
    | \.hg
    | \.mypy_cache

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setting up zsh

install and setup zsh

echo $SHELL

if this is zsh go to the next stage, if not check zsh is installed

which zsh

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Django functional view to class based view refactoring

To understand what's happening with django generic class based views, lets create a function view where we handle all of the functionality explicity, then migrate the functionality to a class.

Setup the model and form

First let's setup the supporting files.

Create the models

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AWS Lambda JWT authenticaiton

AWS API Gateway has the ability to pre-authenticate connections prior to launching the endpoint, by passing the authorizationToken to a Lambda function. There are clear benefits for simplifying end point security and also a reduction in duplicated code by utilising this feature. However I found the AWS examples were excessively complicated for what should be a very simple task.
So here's my example.

The main concern is that AWS Lambda authentication expects a very specific response and if that response is not given it will throw a 500 error with x-amzn-ErrorType: AuthorizerConfigurationException in the response header if the response object is not exactly as expected.

Usage

I personally use to handle the publishing part of my Lambdas, but I'll include an image of the API Gateway config.

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import functools
import datetime


def timed_cache(maxsize=128, typed=False, **timedelta_kwargs):
    def _wrapper(f):
        update_delta = datetime.timedelta(**timedelta_kwargs)
        next_update = datetime.datetime.utcnow() - update_delta
        # Apply @lru_cache to f with no cache size limit
        f = functools.lru_cache(maxsize=maxsize, typed=typed)(f)

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#!/bin/sh

HOSTNAME=`echo $@ | sed s/.*@//`

set_bg () {
  osascript -e "tell application \"Terminal\" to set current settings of window 1 to (first settings set whose name is \"$1\")"
}

on_exit () {
  set_bg "BenDog"

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<select id="reportFileName">
    {% for report in reports_list %}
        {% if report.year %}
            {% for year in years %}
                <option value="{{ report.id }}_{{ report.params }}_{{ year }}.html"> {{ report.name }} {{year}}</option>
                {% for month in months %}
                    <option value="{{ report.id }}_{{ report.params }}_{{ year }}_{{ month}}.html"> {{ report.name }} {{year}} {{month}}</option>
                {% end for %}
 {% end for %}

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Keybase proof

I hereby claim:

• I am bendog on github.
• I am bendog (https://keybase.io/bendog) on keybase.
• I have a public key ASBVVsxFRCokBbBb4dblwEIsU-1_4JayCCC1ZpvFh3yEyQo

To claim this, I am signing this object:

bendog

Ben Fitzhardinge

ben@fitzhardinge.net

Personal Statement

I'm passionate about elegant systems, whether these are for software solutions, managing people, documenting complex problems, or for helping people connect and become more productive.
I believe all systems should help and not hinder the users.

I'm a firm believer in iterative design and Agile methodologies, however in true agile form, I believe the best methodologies should be more like principles. Principles which we can borrow from when it makes sense, not laws which must be obeyed. However when presented with a problem I will always suggest we work towards a minimum viable product, get it out in the hands of the intended audience, and then get the feedback required to make it what it needs to become.