Calibre under Python-3.12.x

OSS542 · 01-26-2025, 03:53 AM

Does anyone know if Calibre runs ok under Python-3.12.x ? I need to upgrade to that, but would like to be able to use Calibre.

DiapDealer · 01-26-2025, 07:20 AM

The version of Python you install on your system doesn't have anything to do with whether or not you're able install/run Calibre using its official installer (even on Linux).

kovidgoyal · 01-26-2025, 07:48 AM

If you are using the official calibre binaries from https://calibre-ebook.com/download_linux they come with their own python and dont care what python you have installed on the system.

OSS542 · 01-26-2025, 08:39 AM

KovidGoyal: Many Thanks for your all your work and your taking the time to respond. You're a credit to your profession...:-)
Forgive me for I have sinned...:-) I am a foolish soul who builds Calibre from source, and have had great success with it. It's also great fun. I was curious as to how it might deal with Python-3.12.x, which I'm upgrading to.... I know I'm on my own as I deserve...

DiapDealer · 01-26-2025, 08:50 AM

For the record: I've installed Arch Linux's packaged Calibre that uses the system's Python 3.13.1, and Calibre does seem to operate for the most part. I've not done a ton of testing, though. I've noticed problems with some 3rd party problems plugins, but that's about it. Most breakage (if any) is probably going to come starting with Python 3.13, I'd say. The official binaries are still highly recommended.

kovidgoyal · 01-26-2025, 11:57 AM

I myself run calibre built against python 3.13 and its test suite passes 100% on it. That said it is not officially supported and there might be some issues especially with third party plugins.

DiapDealer · 01-26-2025, 02:11 PM

That's good to hear! I'll take a look at some of my own plugins that have issues with Python 3.13+ and see if I can work the kinks out.

DiapDealer · 01-26-2025, 02:17 PM

Mostly I have issues with UI plugins not showing up in Calibre menus (they show up fine with the current binary version of Calibre for Linux) with Python 3.13. The config dialog also repeatedly insists that Calibre needs to be restarted before launching the config, yet no amount of restarting works. That works fine with the current binary Linux version too. Any advice where to start looking?

kovidgoyal · 01-26-2025, 10:35 PM

Start with running calibre as

calibre-debug -g

see if any errors are printed out.

DiapDealer · 01-27-2025, 08:41 AM

Sorry... that was my mistake. I thought I had accounted for imghdr being dropped from 3.13 in all plugins that needed it, but turns out I'd fat-fingered it somehow. All good now. Thanks!

OSS542 · 02-04-2025, 01:06 AM

Just to update....
I've just finished building Calibre-7.24 from source under Python-3.12.5. It's working nicely...:-)
Thanks for all the generous commentary and assistance....:-)
A special thanks to KovidGoyal for his excellent work !!!

01-26-2025, 03:53 AM	#1
OSS542 Junior Member Posts: 5 Karma: 34516 Join Date: Oct 2017 Device: Nook Touch	Calibre under Python-3.12.x Does anyone know if Calibre runs ok under Python-3.12.x ? I need to upgrade to that, but would like to be able to use Calibre.

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01-26-2025, 07:20 AM	#2
DiapDealer Grand Sorcerer Posts: 28,262 Karma: 203719142 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	The version of Python you install on your system doesn't have anything to do with whether or not you're able install/run Calibre using its official installer (even on Linux).

01-26-2025, 07:48 AM	#3
kovidgoyal creator of calibre Posts: 44,955 Karma: 27109050 Join Date: Oct 2006 Location: Mumbai, India Device: Various	If you are using the official calibre binaries from https://calibre-ebook.com/download_linux they come with their own python and dont care what python you have installed on the system.

01-26-2025, 08:39 AM	#4
OSS542 Junior Member Posts: 5 Karma: 34516 Join Date: Oct 2017 Device: Nook Touch	KovidGoyal: Many Thanks for your all your work and your taking the time to respond. You're a credit to your profession...:-) Forgive me for I have sinned...:-) I am a foolish soul who builds Calibre from source, and have had great success with it. It's also great fun. I was curious as to how it might deal with Python-3.12.x, which I'm upgrading to.... I know I'm on my own as I deserve...

01-26-2025, 08:50 AM	#5
DiapDealer Grand Sorcerer Posts: 28,262 Karma: 203719142 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	For the record: I've installed Arch Linux's packaged Calibre that uses the system's Python 3.13.1, and Calibre does seem to operate for the most part. I've not done a ton of testing, though. I've noticed problems with some 3rd party problems plugins, but that's about it. Most breakage (if any) is probably going to come starting with Python 3.13, I'd say. The official binaries are still highly recommended.

01-26-2025, 11:57 AM	#6
kovidgoyal creator of calibre Posts: 44,955 Karma: 27109050 Join Date: Oct 2006 Location: Mumbai, India Device: Various	I myself run calibre built against python 3.13 and its test suite passes 100% on it. That said it is not officially supported and there might be some issues especially with third party plugins.

01-26-2025, 02:11 PM	#7
DiapDealer Grand Sorcerer Posts: 28,262 Karma: 203719142 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	That's good to hear! I'll take a look at some of my own plugins that have issues with Python 3.13+ and see if I can work the kinks out.

01-26-2025, 02:17 PM	#8
DiapDealer Grand Sorcerer Posts: 28,262 Karma: 203719142 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	Mostly I have issues with UI plugins not showing up in Calibre menus (they show up fine with the current binary version of Calibre for Linux) with Python 3.13. The config dialog also repeatedly insists that Calibre needs to be restarted before launching the config, yet no amount of restarting works. That works fine with the current binary Linux version too. Any advice where to start looking?

01-26-2025, 10:35 PM	#9
kovidgoyal creator of calibre Posts: 44,955 Karma: 27109050 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Start with running calibre as calibre-debug -g see if any errors are printed out.

01-27-2025, 08:41 AM	#10
DiapDealer Grand Sorcerer Posts: 28,262 Karma: 203719142 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	Sorry... that was my mistake. I thought I had accounted for imghdr being dropped from 3.13 in all plugins that needed it, but turns out I'd fat-fingered it somehow. All good now. Thanks!

02-04-2025, 01:06 AM	#11
OSS542 Junior Member Posts: 5 Karma: 34516 Join Date: Oct 2017 Device: Nook Touch	Just to update.... I've just finished building Calibre-7.24 from source under Python-3.12.5. It's working nicely...:-) Thanks for all the generous commentary and assistance....:-) A special thanks to KovidGoyal for his excellent work !!!