Use custom mod_wsgi and python with limited access to a shared server
AFAIK you can only run Apache with a single version of mod_wsgi at any one time.  This means that all apps must use the same version of Python, which is a problem I have run into before.  I think your options are:
a) Persuade the sysadmin to switch to your version.  It is fine to use a version of Python that is different to system Python.
b) Have a look at something like Gunicorn.  That is more separated from Apache, so will allow apps to use different versions of Python on the same server.
I've been given access to an Ubuntu machine running Apache 2.4.18 for the purpose of hosting a small web application I've developed in Flask.  I'm a user without root privileges.  The system administrator has kindly installed mod_wsgi for me, but this module is linked against the system python, which is version 2.7, and I'd like to use python >= 3.6.  I've therefore compiled my own python 3.7 and my own mod_wsgi on this machine, and am having trouble getting Apache to use it.  Is this possible?
I've tried adding a LoadModule wsgi_module .../mod_wsgi-py37.cpython-37m-x86-64-linux-gnu.so line to var/www/html/whatever/.htaccess, but have learned that this is not allowed at the Directory level of the configuration.  I've also tried using WSGIDaemonProcess user python-home=..., but this also causes Apache to return an Internal Server Error.
To make matters worse, I do not have permissions on var/log/apache2, so I can't see any Apache output except what it's serving.
Is it possible to point Apache to my own mod_wsgi and python binaries without having access to the root configuration of Apache or the system?  If not, are there any workarounds?