NoneType error when trying to open category manager for (publishers|series|tags)

[John A Tucker]

I thought it was a messed up database so I tried calibre in a VM with no library or configuration.

I get this error when trying to manage tags and similar errors for series and publishers.

OS is endeavouros/archlinux with latest updates
calibre is a fresh install of 6.17.0

calibre, version 6.17.0
ERROR: Unhandled exception: <b>TypeError</b>:'NoneType' object is not iterable

calibre 6.17 embedded-python: False
Linux-6.3.1-arch1-1-x86_64-with-glibc2.37 Linux ('64bit', 'ELF')
('Linux', '6.3.1-arch1-1', '#1 SMP PREEMPT_DYNAMIC Mon, 01 May 2023 17:42:39 +0000')
Python 3.11.3
Interface language: en_CA
Traceback (most recent call last):
  File "/usr/lib/calibre/calibre/gui2/tag_browser/ui.py", line 284, in do_tags_list_edit
    d = TagListEditor(self, category=category,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/calibre/calibre/gui2/dialogs/tag_list_editor.py", line 230, in __init__
    self.fill_in_table(None, tag_to_match, ttm_is_first_letter)
  File "/usr/lib/calibre/calibre/gui2/dialogs/tag_list_editor.py", line 425, in fill_in_table
    self.create_table()
  File "/usr/lib/calibre/calibre/gui2/dialogs/tag_list_editor.py", line 390, in create_table
    for col,width in enumerate(self.table_column_widths):
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not iterable

[John A Tucker (jt4201)]

I realized after posting this that I was posting the code from a packaged version. Here is the code from the website install:

calibre, version 6.17.0
ERROR: Unhandled exception: <b>TypeError</b>:'NoneType' object is not iterable

calibre 6.17 embedded-python: True
Linux-6.3.1-arch1-1-x86_64-with-glibc2.37 Linux ('64bit', 'ELF')
('Linux', '6.3.1-arch1-1', '#1 SMP PREEMPT_DYNAMIC Mon, 01 May 2023 17:42:39 +0000')
Python 3.10.1
Interface language: en_CA
Traceback (most recent call last):
  File "calibre/gui2/tag_browser/ui.py", line 284, in do_tags_list_edit
  File "calibre/gui2/dialogs/tag_list_editor.py", line 230, in __init__
  File "calibre/gui2/dialogs/tag_list_editor.py", line 425, in fill_in_table
  File "calibre/gui2/dialogs/tag_list_editor.py", line 390, in create_table
TypeError: 'NoneType' object is not iterable

[Kovid Goyal (kovid)]

Changing the component for this bug.

 assignee
 status

[Charles Haley (cbhaley)]

BTW: you can work around the problem by installing calibre 6.16, opening the category editor on tags, then closing it. After that, 6.17 will work.

[ownedbycats (ownedbycats)]

@John A Tucker - For future reference, you can use the portable version of Calibre (Windows only) to test on a clean config.

EDIT: Oops, you're on Linux.