After removing and then purging hplip, the __pycache__ directories
remain.

# apt purge hplip
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
  hplip*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 358577 files and directories currently installed.)
Purging configuration files for hplip (3.22.10+dfsg0-2) ...
Processing triggers for dbus (1.14.10-1~deb12u1) ...

# ls -R /usr/share/hplip/
/usr/share/hplip/:
base  copier  fax  installer  pcard  prnt  __pycache__  scan  ui5

/usr/share/hplip/base:
pexpect  __pycache__

/usr/share/hplip/base/pexpect:
__pycache__

/usr/share/hplip/base/pexpect/__pycache__:

/usr/share/hplip/base/__pycache__:

/usr/share/hplip/copier:
__pycache__

/usr/share/hplip/copier/__pycache__:

/usr/share/hplip/fax:
__pycache__

/usr/share/hplip/fax/__pycache__:

/usr/share/hplip/installer:
__pycache__

/usr/share/hplip/installer/__pycache__:

/usr/share/hplip/pcard:
__pycache__

/usr/share/hplip/pcard/__pycache__:

/usr/share/hplip/prnt:
__pycache__

/usr/share/hplip/prnt/__pycache__:

/usr/share/hplip/__pycache__:

/usr/share/hplip/scan:
__pycache__

/usr/share/hplip/scan/__pycache__:

/usr/share/hplip/ui5:
__pycache__

/usr/share/hplip/ui5/__pycache__:

Scott K