[Trac] 1.4->1.6 svn binding trouble (is there a guide?)

Updating a site from 1.0.9, have got to Ubuntu 22.04/Trac 1.6, but cannot 
get svn 'bindings' to work for toffee. Any help would be really, really 
appreciated.

One thing I noticed is that "site-packages" are all under the admin user 
home directory (only 'dist-packages' under /usr/local/lib/python3.10).

The machine has been upgraded through various OS versions and was running 
with python 2.7 before latest OS upgrade.

Basic test:

>>> from svn import core
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: cannot import name 'core' from 'svn' 
(/usr/local/lib/python3.10/dist-packages/svn/__init__.py)


Packages:

apache2-bin/jammy-updates,jammy-security,now 2.4.52-1ubuntu4.9 amd64 
[installed,automatic]
apache2-data/jammy-updates,jammy-updates,jammy-security,jammy-security,now 
2.4.52-1ubuntu4.9 all [installed,automatic]
apache2-utils/jammy-updates,jammy-security,now 2.4.52-1ubuntu4.9 amd64 
[installed,automatic]
apache2/jammy-updates,jammy-security,now 2.4.52-1ubuntu4.9 amd64 [installed]
libapache2-mod-svn/jammy-updates,jammy-security,now 1.14.1-3ubuntu0.22.04.1 
amd64 [installed]
libapache2-mod-wsgi-py3/jammy-updates,jammy-security,now 4.9.0-1ubuntu0.1 
amd64 [installed]
libsvn-dev/jammy-updates,jammy-security,now 1.14.1-3ubuntu0.22.04.1 amd64 
[installed]
libsvn1/jammy-updates,jammy-security,now 1.14.1-3ubuntu0.22.04.1 amd64 
[installed,automatic]
python3-subversion/jammy-updates,jammy-security,now 1.14.1-3ubuntu0.22.04.1 
amd64 [installed]
python3-svn/jammy,now 1.9.15-1build1 amd64 [installed]
subversion/jammy-updates,jammy-security,now 1.14.1-3ubuntu0.22.04.1 amd64 
[installed]


pip freeze:

appdirs==1.4.4
attrs==21.2.0
Automat==20.2.0
bcrypt==3.2.0
blinker==1.4
chardet==4.0.0
click==8.0.3
colorama==0.4.4
command-not-found==0.3
configobj==5.0.6
constantly==15.1.0
cryptography==3.4.8
dbus-python==1.2.18
distro==1.7.0
distro-info==1.1+ubuntu0.2
dnspython==2.6.1
docutils==0.21.2
fs==2.4.16
html5lib==1.1
httplib2==0.20.2
hyperlink==21.0.0
idna==3.3
importlib-metadata==4.6.4
incremental==21.3.0
jeepney==0.7.1
Jinja2==3.1.4
keyring==23.5.0
language-selector==0.1
launchpadlib==1.10.16
lazr.restfulclient==0.14.4
lazr.uri==1.0.6
MarkupSafe==2.1.5
more-itertools==8.10.0
netifaces==0.11.0
nose==1.3.7
oauthlib==3.2.0
pexpect==4.8.0
pillow==10.3.0
ptyprocess==0.7.0
pyasn1==0.4.8
pyasn1-modules==0.2.1
pycurl==7.44.1
Pygments==2.18.0
PyGObject==3.42.1
PyHamcrest==2.0.2
PyJWT==2.3.0
pyOpenSSL==21.0.0
pyparsing==2.4.7
pysvn==1.9.15
python-apt==2.4.0+ubuntu3
python-dateutil==2.9.0.post0
python-debian==0.1.43+ubuntu1.1
python-magic==0.4.24
PyYAML==5.4.1
regex==2024.5.15
SecretStorage==3.3.1
service-identity==18.1.0
six==1.16.0
sos==4.5.6
ssh-import-id==5.11
svn==1.0.1
systemd-python==234
textile==4.0.2
Trac==1.6
TracAccountManager==0.6.0
TracSpamFilter==1.2.7
Twisted==22.1.0
ubuntu-pro-client==8001
ufw==0.36.1
unattended-upgrades==0.1
wadllib==1.3.6
webencodings==0.5.1
zipp==1.0.0
zope.interface==5.4.0

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