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Stephen Gruppetta

@s_gruppetta_ct

Apr 11

What's an image made of?

There are many correct answers.

But the most fascinating one is: << sines & cosines >>

Read on if you're intrigued👇🧵🪡

#python #images #fourier

*Any* image can be reconstructed from a series of sinusoidal gratings.

A sinusoidal grating looks like this…

#sinusoidal #grating

It’s called a sinusoidal grating because the grayscale values vary according to the sine function.

If you plot the values along a horizontal line of the grating, you’ll get a plot of a sine function

Read 18 tweets

Stephen Gruppetta

@s_gruppetta_ct

Apr 10

A quick introduction: I used to be a physicist, which is where I learnt coding.

As a university academic, coding and teaching were both things I enjoyed.

👇🧵🪡
thepythoncodingbook.com/about/
#coding #python

I always felt that explaining abstract and complex concepts in an accessible way was something I'm good at.

My undergrad students agreed…

And now, so do my coding students, young and, er, not so young…

#teaching #learning

@codetoday_

Now I spend my time:
—> running @codetoday_
—> teaching coding to kids & adults
—> writing articles and books on #coding and #Python
—> creating and running Python courses and workshops (coming soon…)

You can read my articles on:
º thepythoncodingbook.com
º @realpython

Read 4 tweets

Stephen Gruppetta

@s_gruppetta_ct

Apr 9

What frustrates you most when learning to code from books, tutorials, or video courses?

I’ll start… 🧵🪡

#coding #python #learntocode #100daysofcode

1. The instructor cannot understand what a beginner knows and doesn’t know, and assume some things are basic when they’re not for a beginner.

2. “It clearly follows that…”
When following a tutorial, key steps are skipped which are not trivial for a beginner.

Read 7 tweets

Stephen Gruppetta

@s_gruppetta_ct

Apr 9

Who's Monty & what's a White Room got to do with *truly* understanding concepts in #Python #coding?

What’s more challenging in the early days when you learn coding is to join the dots between various topics you learn, viewing them as a coherent set of tools

🧵🪡
#100daysofcode

Here's The White Room analogy in brief:

I call the computer program Monty.

Monty is the one who’s busy doing things, performing all the actions required in your computer program.

But Monty/the computer program needs some infrastructure to be able to operate.

This infrastructure is the White Room: an empty room with white walls and white ceilings–a blank canvas.

Read 11 tweets

Stephen Gruppetta

@s_gruppetta_ct

Apr 9

One of the best ways to understand a new topic in many non-computing fields is to write a computer program using that topic.

One of the most recent examples for me was drawing using the two-point perspective technique…

#python #drawing #twopointperspective #coding

I don't know anything about art or drawing.

My son asked about perspective drawing, so we found some YouTube videos.

They sort of made sense, but…

it's only when I wrote a Python program to draw using two-point perspective that it *really* made sense.

I'm writing a blog to document this learning process, and to go through the code I wrote.

So stay tuned...

#drawing #python #coding

Read 4 tweets

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