Articles about Python

Building a Raspberry Pi 3 prototype camera that takes a picture at the press of a button

A fun way to test your Raspberry Pi Camera on your Raspberry Pi 3 is to build a prototype that takes a picture at the press of a button. Through such an activity, we will be able to experience:

• connecting a button to the GPIO ports on a Raspberry Pi.
• setting up a camera through the CSI interface of a Raspberry Pi.
• preparing an operating system, such as Raspbian Stretch Lite , for running Raspberry Pi projects.
• coding a Python 3 script that interacts with the GPIO port and camera on a Raspberry Pi.
• running a Python 3 script when Raspberry Pi powers on.

Given these points, this post shows how you can build a Raspberry Pi 3 prototype camera that takes a picture at the press of a button.

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.