Book Review: The Power Of Habits

Posted by Jack McKew on Thu 13 February 2020 in Book Reviews • Tagged with bookreview, principles, habits • 3 min read

Power of Habits by Charles Duhigg was one of the most useful books I have read. While it doesn't explicitly step the reader through how to change habits, it thoroughly goes through many examples of where habits have changed other people's lives, case studies if you will. By then being …


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Automatically Generate Documentation with Sphinx

Posted by Jack McKew on Mon 03 February 2020 in Python • Tagged with python • 5 min read

Document code automatically through docstrings with Sphinx

This post goes into how to generate documentation for your python projects automatically with Sphinx!

First off we have to install sphinx into our virtual environment. Pending on your flavour, we can do any of the following

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pip install sphinx …

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3D Terrain in Python

Posted by Jack McKew on Fri 24 January 2020 in Python • Tagged with python, visualisation, generative • 21 min read

Generating & Visualising 3D Terrains in Python

Today, let's put together a 3D visualisation of randomly generated 'terrain' with Python. Data visualisation is an absolutely key skill in any developers pocket, as communicating both data, analysis and more is thoroughly simplified through the use of graphs. While a picture tells a …


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Intro To GeoPandas

Posted by Jack McKew on Wed 15 January 2020 in Python • Tagged with python, visualisation • 6 min read

Pandas for geospatial data

Personally whenever I am faced with a problem that involves analysing geospatial data, GeoPandas is the first tool/package I reach for. Extending on the Pandas dataframe data structure, GeoPandas brings functionality for working with points, polygons and more out of the box. This post is …


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Migrating from Wordpress to Pelican

Posted by Jack McKew on Fri 20 December 2019 in Software Development • Tagged with python • 5 min read

For some time now I have been wanting to move away from Wordpress, due to my specific case of wanting to embed custom HTML and JavaScript code snippets to enable interactive data visualisation. Furthermore my previous workflow of posts was disjointed in which I would develop the code in a …


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Making Executables Installable with Inno Setup

Posted by Jack McKew on Fri 08 November 2019 in Software Development • Tagged with python • 1 min read

Following on from last week's post on making executable GUIs with Gooey, this post will cover how to make the executables we have packaged up into installable files so our users can run them easily.

Once we have created the executable file for our GUI (which will be located in …


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Making Executable GUIs with Python, Gooey & Pyinstaller

Posted by Jack McKew on Fri 01 November 2019 in Python • Tagged with python • 4 min read

Today we will go through how to go from a python script to packaged executable with a guided user interface (GUI) for users. First off we still start by writing the scripts that we would like to share with others to be able to use, especially for users that may …


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Hands On Machine Learning Chapter 3

Posted by Jack McKew on Sat 12 October 2019 in Machine Learning • Tagged with machinelearning, ai, python • 3 min read

Chapter 3 is focusing in on classification systems. As brought up earlier, most common supervised machine learning tasks are regression (predicting values) and classification (predicting classes). This chapter goes through the 'Hello World' of classification tasks, the MNIST dataset. The MNIST dataset is a set of 70,000 images of …


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Book Review: Principles by Ray Dalio

Posted by Jack McKew on Fri 11 October 2019 in Book Reviews • Tagged with bookreview, principles, habits • 4 min read

I've just finished reading Ray Dalio's book Principles, and wanted to use this space to jot down some of my personal takeaways and thoughts. To give some background, Ray Dalio, founder of Bridgewater Assosciates, one of the largest hedge funds in the world, wrote this book around the unique principles …


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Intro to Games in Python with Pyglet

Posted by Jack McKew on Fri 04 October 2019 in Python • Tagged with python, pyglet • 3 min read

Recently, I've been researching ways that I could run a 2D simulation (and hopefully 3D) with many moving pieces and there was a desire to make it interactive as well. I stumbled through many visualisation frameworks such as:

Eventually, through the motivation of …


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Introduction to Pytest & Pipenv

Posted by Jack McKew on Fri 20 September 2019 in Python • Tagged with python, pytest, pipenv • 2 min read

Unit tests in general are good practice within software development, they are typically automated tests written to ensure that a function or section of a program (a.k.a the 'unit') meets its design and behaves as intended.

This post won't go into testing structures for complex applications, but rather …


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Inheritance in Python

Posted by Jack McKew on Fri 13 September 2019 in Python • Tagged with python • 2 min read

As Python is a high level, general purpose programming language, which supports users to define their own types using classes, which are most often following the concept of object-oriented programming. Object-oriented programming is a type of software design in which users not only define the data type (eg, int) of …


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Dunders in Python

Posted by Jack McKew on Fri 06 September 2019 in Python • Tagged with python • 3 min read

A 'dunder' (double underscores) in Python (also known as a magic method) are the functions within classes having two prefix and suffix underscores in the function name. These are normally used for operator overloading (eg, __init__, __add__, __len__, __repr__, etc). For this post we will build a customized class for …


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Python Project Workflow

Posted by Jack McKew on Fri 30 August 2019 in Python • Tagged with python • 5 min read

This post will go through my personal preference on project structure and workflow for creating a new project and an insight how I work on my projects from a development point of view. I will go from the very start as if I did not have Python/Git installed on …


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Linear Regression: Under the Hood with the Normal Equation

Posted by Jack McKew on Sun 25 August 2019 in Data Science • Tagged with python • 3 min read

Let's dive deeper into how linear regression works.

Linear regression follows a general formula:

$$ \hat{y} = \theta_0 + \theta_1x_1 + \theta_2x_2 + \cdots + \theta_nx_n $$

Where \(\hat{y}\) is the predicted value, \(n\) is the number of features, \(x_i\) is the \(i^{th}\) feature value and \(\theta_n\) is the \(n^{th}\) model parameter. This …


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Intro to Web Scraping

Posted by Jack McKew on Fri 23 August 2019 in Python • Tagged with python • 4 min read

Following on from last weeks post where we analysed the amount of repeated letters within current New Zealand town names. There was still one part of that analysis that really bugged me, and if you noticed it was from the data set that was used was using the European town …


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Looking for Patterns in City Names & Interactive Plotting

Posted by Jack McKew on Fri 16 August 2019 in Python • Tagged with python, datascience • 5 min read

Recently, I was traveling around New Zealand, and noticed in the Maori language they use letters back to back a lot like in the original Maori name for Stratford ("whakaahurangi"). So as any normal person does, I thought, well what town has the most repeated letters, and the idea for …


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PyCon AU 2019 Sunday In Summary

Posted by Jack McKew on Wed 07 August 2019 in Python • Tagged with python, pyconau • 4 min read

This is a follow on from my last post PyCon AU 2019 Saturday In Summary.

Day 2

The real costs of Open Source Sustainability \@vmbrasseur

The key takeaway that I got from this talk, was the typical reaction for problems which are far away from yourself or out of your …


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PyCon AU 2019 Saturday In Summary

Posted by Jack McKew on Tue 06 August 2019 in Python • Tagged with pyconau, python • 5 min read

My first ever conference, learning things I'd never even think of, meeting lots of new people and making my to-do list full of new things to learn. All this happened over the weekend at PyConAU 2019. This post is dedicated to all the fantastic people I met that gave me …


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Hands On Machine Learning Chapter 2

Posted by Jack McKew on Fri 12 July 2019 in Machine Learning • Tagged with machinelearning • 3 min read

Chapter 2 is an end to end machine learning project, in which you pretend to be a recently hired data scientist for a real estate company. It cannot be emphasized enough that when learning about machine learning or any topic for that matter, it is best to actually experiment with …


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