```
answers_field_order=sorted(
    set(j for i in data['items'] for j in i),
    key=cmp_to_key(lambda x,y:(
        -1 if (x,y) in answer_order 
        else (0 if x==y else 1)))
        )
```
when the cursor is placed in line 5 col 31 (between `)` and `))` ) hitting Ctrl-0 (Show surrounding parens) produces an error sound, though there's no error, the script works fine.

```
$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.4 LTS
Release:	18.04
Codename:	bionic
$ uname -a
Linux odd-one 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
$ python3.8
Python 3.8.0 (default, Oct 28 2019, 16:14:01) 
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import importlib
>>> importlib.util.find_spec('idlelib.pyshell')
ModuleSpec(name='idlelib.pyshell', loader=<_frozen_importlib_external.SourceFileLoader object at 0x7f1ea8ee14c0>, origin='/usr/lib/python3.8/idlelib/pyshell.py')
>>> exit()
$ dpkg-query -S /usr/lib/python3.8/idlelib/pyshell.py
idle-python3.8: /usr/lib/python3.8/idlelib/pyshell.py
$ dpkg -l | grep idle-python3\.8
ii  idle-python3.8                             3.8.0-3~18.04                                    all          IDE for Python (v3.8) using Tkinter
```