Articles about Python

How to use Python 3 Pillow on Raspbian Stretch Lite to compress your jpeg image

When you are building a Raspberry Pi camera project, you may want to compress the images captured from the camera to reduce the time to upload your image to a server endpoint. Moreover, when you connect your Raspberry Pi to your iPhone Personal WiFi hotspot, you will want to incur minimal mobile bandwidth charges from demonstrating your Raspberry Pi project in your class.

You may have either:

• Setup Raspbian Stretch Lite on Raspberry Pi 3 to run Python 3 applications, or
• Setup Raspbian Stretch Lite on Raspberry Pi Zero W to run Python 3 applications.

In this case, you will have the option to use Pillow, a fork of Python Imaging Library, to compress your jpeg image.

How to upload a file and some data through HTTP multipart in Python 3 using the requests library

Undeniably, the HTTP protocol had become the dominant communication protocol between computers.

For example, when we want to upload a file and some data from to a HTTP server, we do so through a HTTP multipart request.

So how can we do that in Python? In Python 3, we can use the services of the requests library to help us construct HTTP multipart request easily.

In case you need it, this is how to upload a file and some data through HTTP multipart in Python 3 using the requests library.

How to setup Python Imaging Library, Pillow, on Raspbian Stretch Lite for processing images on your Raspberry Pi

When you are building a Raspberry Pi project that deals with images, the Python Imaging Library, Pillow can be very useful. For example, if you connect a camera to your Raspberry Pi 2 or 3 and took a picture, you may want to resize the picture before sending it to a server endpoint.

In case you have trouble setting up Pillow on Raspbian Stretch Lite, this post is for your reference.

Programming languages that you can use to build applications for Raspberry Pi, via Raspbian Stretch Lite

A programming language give programmers an interface to create computer applications to serve different use cases. On the other hand, a Raspberry Pi is one of the things that a programmer should consider getting.

Raspbian Stretch Lite is the official operating system for programmers to run server applications on a Raspberry Pi. You can use Raspbian Stretch Lite for applications that do not require a graphical user interface.

So what programming languages can you use for building applications for Raspbian Stretch Lite?

This post discusses some programming languages that you can use for building applications for Raspbian Stretch Lite.

How to permutate a string in Python 3

To permutate a string is to change the order or arrangement of the characters that the string is made up of. Given that n is the number of characters, there are n! different ways to permutate a given string.

This post shows how we can permutate a string in Python 3.

How to setup Jupyter Notebook on Raspberry Pi 3 with Raspbian Stretch Lite, Supervisor and Virtualenv to run Python 3 codes

By taking Andrew Ng’s Deep Learning Coursera course, you can get a better understanding of deep learning. In addition, you will also get many Jupyter Notebook documents that you can reference to build models that can solve interesting problems.

In order to readily access these documents, you may want to setup Jupyter Notebook on a single board computer like the Raspberry Pi 3. With this in mind, this post shows how you can setup Jupyter Notebook on Raspberry Pi 3 with Raspbian Stretch Lite, Supervisor and Virtualenv to run Python 3 codes.

How to setup Taiga project management platform on Raspberry Pi 3 with Raspbian Stretch Lite

A project management platform is useful for us to keep tabs on what we want to build. Taiga is a popular open source project management platform that is highly recommended by opensource.com to be the top open source alternative to Trello.

Taiga runs well on a Raspberry Pi 3. If you want to setup something at home to help you manage the projects that you are working on, you can consider setting up the Taiga project management platform on a Raspberry Pi 3 with Raspbian Stretch Lite as the base operating system.

This post is adapted from Taiga’s installation guide to serve as a guide to setting up Taiga project management platform on Raspberry Pi 3 with Raspbian Stretch Lite.

How to paginate MongoEngine records in your Python 3 Flask application

Flask and MongoEngine help makes development work easier.

One common task in the development of backend applications is the pagination of database records. Without pagination, the application server can run out of memory while generating a response from the database records.

This post discusses a way to paginate MongoEngine records in your Python 3 Flask application using the facilities provided by the Flask-MongoEngine extension.

How to deploy Python 3 Flask application on Raspberry Pi 3 with Raspbian Stretch Lite, Nginx, Supervisor, Virtualenv and Gunicorn

Raspberry Pi 3 Model B boards make good gifts for programmers and if someone had gifted you with one, you may want to use it as a control center for interacting with various IoT sensors and devices at home.

In such a situation, you may want to build a Python 3 Flask application to present the web interface for accessing the control center.

After you had built that Python 3 Flask application, the next step will be to deploy it on your Raspberry Pi 3 for serving HTTP requests.

This post discusses how you can deploy a Python 3 Flask application on Raspberry Pi 3 with Raspbian Stretch Lite, Nginx, Virtualenv and Gunicorn.