I am seeking installation assistance. I have tried twice to install IDR.

I first tried python 3 setup.py. install as instructed in the manual. I received the following error:

[Errno 2] No such file or directory: 'Library/Python/3.8/site-packages/test-easy-install-53208.write-test'
The installation directory you specified (via --install-dir, --prefix, or the disutils default setting was:
/Library/Python/3.8/site-packages/
This directory does not currently exist. Please create it and try again, or choose a different installation directory (using the -d or --install-dir option)

Following I realized my python site-packages are in my home directory /User/myhomedir/Library/Python/3.8/lib/python/site-packages

I added this to my python path and attempted the install again.

This time specifying the prefix

python3 setup.py install --prefix=/User/myhomedir/Library/Python/3.8/lib/python/site-packages

The install was again unsuccessful and I got this error

You are attempting to install a package to a directory that is not on PYTHONPATH and which Python does not read ".pth" files from. The installation directory you specified (via --install-dir, --prefix or the distutils defuault setting) was:
/Users/myhomedir/Library/Python/3.8/lib/python/site-packages/lib/python3.8/site-packages/
and your PYTHONPATH environment variable currently contains:
':/Users/myhomedir/Library/Python/3.8/lib/python/site-packages'

Could you provide any assistance/ provide explanation.