*This is a reminder from course 1. If you have completed course 1, please skip this lesson.

Here we will learn how to install and set up Processing 3.5.4 with Python mode, enabling them to write and visualize Python code in an interactive environment.

Choosing our learning environment:

Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts. Developed by Casey Reas and Ben Fry, it was initially created to serve as a foundation for teaching non-programmers the fundamentals of computer programming in a visual context. The essence of Processing lies in its simplicity and accessibility, making it an ideal platform for artists, designers, architects, and anyone interested in creating digital art or interactive projects.

While Processing 4 is the latest version and offers a range of updated features and improvements, we have chosen to use Processing 3.5.4 for our course, particularly for those working in Python mode .

The decision stems from the fact that Processing 4's Python mode currently has some bugs that can significantly impact the learning experience. One notable issue is the environment's ability to highlight errors in Python code effectively. This feature is crucial for beginners, as it helps them quickly identify and understand mistakes in their code. Unfortunately, in Processing 4, this error-highlighting functionality is not working as reliably as it does in Processing 3.5.4. To ensure that all students have a smooth and educational coding experience where they can easily see and correct their mistakes, we will be working with Processing 3.5.4. This version provides a stable and supportive environment for learning Python in a dynamic, visual context.

Now, let's install Processing.

Step 1: Download Processing 3.5.4

• Go to the Processing download page ( https://processing.org/download/).

• Select the version compatible with their operating system under the "list of stable releases" section, specifically Processing 3.5.4.

• The download link will allow you to download the .zip file package that contains Processing. Once you download it, unpackage it and you should see the folder below:

• You can execute processing by just executing the Processing.exe file. No installation will be required. We suggest that you keep track of this folder and place it somewhere, such as your 'Program Files' folder.

Step 2: Install Python Mode in Processing

• Open Processing : Find the Processing application on your computer and open it.

• Access Modes : In the Processing application, look at the top-right corner for a dropdown menu that says "Java" . Click on it and then select "Add Mode...".

• Switch to Python Mode : Close the "Mode Manager" window. Click again on the mode dropdown menu at the top-right (it might still say "Java") and select "Python" to switch modes.

• Install Python Mode : In the "Mode Manager" window that appears, scroll down to find "Python Mode for Processing 3" and click the "Install" button next to it. Wait for the installation to complete.

• Now, you will have access to all the Python examples and the possibility to write Python code within Processing.

You can also check out the documentation and reference files for Processing Python with this link:

https://py.processing.org/reference/