In the screen shot below you can see the Qt Designer form showing some LED widgets. On Ubuntu these are in the package libpython3.4-dev, which you can install by running You will want to have the Python development tools installed.
![qt designer python download qt designer python download](https://i.ytimg.com/vi/VUg0VOKfu5Y/maxresdefault.jpg)
I will assume you already have installed Python 3 and some version of Qt 5. Instead, we'll build the necessary code from source so that it can work with a version of Qt you may have compiled yourself. I didn't spend further time on it as I generally build Qt myself from source so that I can use a more recent Qt release than that provided by the Linux distribution. In my case (Ubuntu 14.04.5) it did not work for me.
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Since most Linux distributions include Qt and PyQt, you may be able to run the example code using the software packages provided by your Linux distribution rather than building it yourself. I used a recent version of Ubuntu Linux, but the steps should be the same on other distributions. I'll go over the steps needed to make this example work on a Linux desktop system. We will need to build this plugin as one of the steps to run the example code. That is not part of standard Qt itself, but rather part of PyQt, specifically a shared library libpyqt5.so. The key to using a PyQt widget from Qt Designer is a Qt Designer plugin to support PyQt widgets. LedGallery.ui: This is a Qt Designer UI file that has several LED widgets and some controls to adjust the state, flashing, and flash rate. Ledplugin.py: This implements a Designer plugin by subclassing the QPyDesignerCustomWidgetPlugin class and providing the required methods for a plugin. It is similar to the code in the C++ version.
![qt designer python download qt designer python download](https://i.imgur.com/74DDF2F.png)
![qt designer python download qt designer python download](https://ceg.developpez.com/tutoriels/python/configurer-qtcreator-pour-python/images/qtcreator.png)
Ledwidget.py: A port of the earlier LED widget to Python and PyQt. The download link (2) contains the example code referenced in this blog post. Not all the steps to do this are obvious so I'll walk you through.
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In an earlier blog post (1) I described how to create a widget with a Qt Designer plugin interface so it can be viewed within Qt Designer. With the increased interest in using Qt from the Python programming language, I asked one of our developers to reproduce the same example, but implement the widget in Python with PyQt.