calibre 7.6.0 / python error

[Yossarian]

When I want to edit some books, I get the following error. Unfortunately, I don't know how to fix this error. Perhaps someone knows the solution?

TypeError:sequence item 1: expected str instance, bytes found

calibre, version 7.6.0
FEHLER: Unbehandelter Ausnahmefehler: <b>TypeError</b>:sequence item 1: expected str instance, bytes found

calibre 7.6 embedded-python: False
Linux-6.8.0-107045-tuxedo-x86_64-with-glibc2.39 Linux ('64bit', 'ELF')
('Linux', '6.8.0-107045-tuxedo', '#45tux1 SMP PREEMPT_DYNAMIC Thu Sep 12 19:21:40 UTC 2024')
Python 3.12.3
Interface language: de
EXE path: /usr/bin/python3.12
Successfully initialized third party plugins: Find Duplicates (1, 10, 9)
Traceback (most recent call last):
File "/usr/lib/calibre/calibre/gui2/__init__.py", line 755, in dispatch
self.func(*args, **kwargs)
File "/usr/lib/calibre/calibre/gui2/tweak_book/job.py", line 84, in job_done
callback(job)
File "/usr/lib/calibre/calibre/gui2/tweak_book/boss.py", line 381, in book_opened
self.current_metadata = self.gui.current_metadata = container.mi
^^^^^^^^^^^^
File "/usr/lib/calibre/calibre/ebooks/oeb/polish/container.py", line 649, in mi
mi = self.serialize_item(self.opf_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/calibre/calibre/ebooks/oeb/polish/container.py", line 1009, in serialize_item
data = re.sub(br'(<[/]{0,1})opf:', r'\1', data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/re/__init__.py", line 186, in sub
return _compile(pattern, flags).sub(repl, string, count)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: sequence item 1: expected str instance, bytes found

Many thanks in advance.

[pdurrant]

I notice

calibre 7.6 embedded-python: False

in the log. I'm guessing that your system python is different enough from the python that calibre is written against that there's a syntax difference.

But that is just a guess.

[JSWolf]

You should also update to the latest calibre. It's not worth while to try to debug an older calibre.

[chaley]

Originally Posted by Yossarian

calibre 7.6 embedded-python: False
Linux-6.8.0-107045-tuxedo-x86_64-with-glibc2.39 Linux ('64bit', 'ELF')
('Linux', '6.8.0-107045-tuxedo', '#45tux1 SMP PREEMPT_DYNAMIC Thu Sep 12 19:21:40 UTC 2024')
Python 3.12.3

Adding to what @pdurrant said, you are running Python 3.12.3. Calibre hasn't yet been ported to python 3.12.

Adding to what @JSWolf said, there might have been some 3.12 problem workarounds added in a more recent release. Upgrade to find out.

If you are using a distro-provided release of calibre, which it looks like you are, then change to the official release at https://calibre-ebook.com/download.

[Yossarian]

Thank you for your answers. Yes, I am using Kubuntu 24.04 and have installed Calibre from the package sources. I give it a try to install the latest version of Calibre, following the instructions for Linux and let you know if I was successful.

Cheers, Yossarian

[S01010000]

Hi, long shot but does anyone know of you can use the system Python with the Mac version of calibre?

[kovidgoyal]

No, you cannot.

[pdurrant]

Originally Posted by S01010000

Hi, long shot but does anyone know of you can use the system Python with the Mac version of calibre?

The current macOS does not come with any version of Python, and hasn't since macOS 12.3

[Yossarian]

I have uninstalled Calibre and installed the latest version as described on the Calibre website. Now everything is correct and I can edit any book without an error message appearing.

Thank you guy's.