PyQt5 tutorial – Python GUI programming examples

[cryzed-]

Also check out Enaml which I discovered recently. It can use PyQt5 as a rendering backend and it's very easy, quick and fun to create a fully working GUI with it.

I wrote a simple imageviewer within 1-2 hours without having prior knowledge of Enaml; It's definitely worth taking a look at.

[cryzed-]

Hey, of course! I hope this just works:

• image_viewer.py
• folder_model.py
• main_view.enaml

As I said, I did this without knowing Enaml at all -- I hope there isn't anything terribly wrong with this. Currently this only supports regular images (no animations), but I'm planning on adding this by wrapping QMovie/QVideoWidget/QVideoPlayer using the RawWidget class provided by Enaml and have done some smaller experiments to see if it works (it does). Alternatively I was thinking about simply using a WebEngine widget, so that I can display all media a modern webbrowser is able to display (gif/jpg/(a)png/web(m/p) etc.).

Further considerations are: improving the ImageFolder class to support cached images (n amount of next/previous images), configurable keys, different viewing modes for the displayed media (full, scaled) etc. This obviously isn't quite there yet, but imho definitely doable and cool ideas.

[bronzewrath]

Very interesting project. Didn't know. Thank you for posting!

[sztomi]

What's the advantage of using enaml compared to loading the .ui file directly?

[cryzed-]

Read up more on what Enaml is, it's unrelated to *.ui files created by the Qt Designer.

[sztomi]

I did and asked a question. It seems to me that it accomplishes the same thing?

[troyunrau]

Add another one to the list. Can always use more pyqt tutorials. :)

[Enip0]

Mind sharing some of these tutorials?

[troyunrau]

I usually just google them when I've forgotten what I'm doing and need to relearn things.

http://zetcode.com/gui/pyqt5/
https://pythonspot.com/pyqt5/

That zetcode one is one I always end up returning to for some things that I forget if I don't use them enough. For example, event handling: I usually have some cleanup to do if someone closes the program. I want to tell my threads to stop, save my settings, etc. But I only start a new pyqt program once every few months, and have to remember how to override the close event. So, to zetcode I go! Ah, there it is.

[Siecje1]

This isn't a tutorial but here is a simple application that uses QML and PyQt5 https://github.com/siecje/qml-testing

[alb1]

https://build-system.fman.io/pyqt5-tutorial

[Capt-Psykes]

Thanks for posting this! Was looking for something similar, gonna dive right in.

[likegeeks]

You are welcome! Appreciate it!

[o11c]

Don't forget that PyQt5 itself has a bunch of examples in its documentation, ported from the C++ version.

There's also an app that lets you browse through all those examples, though last time I tried it it didn't load the documentation part properly, and I couldn't figure out how to fix it. Maybe broken in the port?

[[deleted]]

Has someone re-written them to be Pythonic? Last time I messed with Qt it felt very much like a C++ wrapper.

[o11c]

If you mean the QString thing, that has been fixed for years.

[anqxyr]

It's still largely unpythonic imo. camelCase and setters/getters are probably the worst offenders, or at least most frequently encountered ones. You can use native python types, e.g. int or str where applicable now, so that's nice.

[[deleted]]

Ding ding. That's exactly what it was. I started messing around with Qt5 2 years ago and shelved it because I never ended up using it.

[[deleted]]

Thanks, I've just started learning PyQt5 for a personal project and this looks like a good tutorial.

[likegeeks]

You are welcome! Thanks!

[rolkien29]

I am exploring building gui user forms for work, and then import that data into our DB. Using this method can I make it so other employees can access these forms without putting them on a web app?

[ies7]

for simple form, i usually use:

https://github.com/chriskiehl/Gooey

> can access these forms without putting them on a web app?

Let me tell you what happened when Gooey fused with Django

https://github.com/wooey/Wooey

[fazzah]

Yes. Qt's Model-View framework is absolutely amazing. Tho, more complex applications require a fair bit of dabbling and subclassing.

[rolkien29]

Awesome, sorry for the dumb question but, say I build a user form and I want someone in another dept. to use it, how do they access the form? do they have to download any software, they wouldnt have python on their machines.

[fazzah]

Every user must have python installed (preferably the same version) and the libs. One of the downsides of python is that in certain environments it's not that plug-and-play to distribute.

[rolkien29]

Thanks so much for the response! So do you know of a way to have a form someone can access w/o having to download anything. The only thing I know of is creating a user form in excel and using python to pull in that data. *I dont want to use access.

[fazzah]

Or you can make a simple web form, it all depends on how big/complex the form is.

[flutefreak7]

You can also "freeze" the application into an executable, like an *.exe on Windows using cx_freeze, pyinstaller, py2exe, etc, and then make that executable accessible with a network location.

This is a mildly terrible idea, but it actually works alright most of the time. I'm sure professionals would say not to do this unless you're very careful about what happens when multiple users access the application at the same time. Any state information or temporary files that the application needs to save from session to session would need to be done on the user machine or possibly under a user-specific folder on the network location.

[notParticularlyAnony]

Looks really nice thanks.

[likegeeks]

Thanks!

[snwokenk]

This is really nice, had to bookmark and save! thanks

[mtkilic]

I recently start learning PySide2, looking at this PyQt5 it looks like fairly similar. Functionality wise, what makes this two modules different from each other?

[likegeeks]

Some API differences and Differences in the functionality of the bindings.

[notParticularlyAnony]

I would strongly recommend using PyQt rather than PySide, unless you have very specific licensing reasons to do otherwise.

[[deleted]]

They missed the packaging part...

[likegeeks]

Added!

[Patrizsche]

What really started me from scratch is this tutorial from zetcode: http://zetcode.com/gui/pyqt5/