How to access multiple copies of wsgi site on server - apache

Question

I have a Flask web site providing a service on an apache server, and now would like to run another copy of the code base for testing purposes on the same server (a different svn branch). So, I've installed the codebase in a different place on the server, and added another WSGIScriptAlias entry, referencing the test codebase, to the apache conf file:
# Entry point for the user web interface:
WSGIScriptAlias /mysite /blah/blah/wsgi_entry.py
# Entry point for the test branch of the user web interface:
WSGIScriptAlias /mysiteTEST /blah/blah/testBranch/wsgi_entry.py
I was hoping that sending the browser to "mysiteTEST" instead of the usual "mysite" would have me running the code in the test branch. However it runs the original code, presumably because the wsgi_entry.py simply does something like:
from my_main_module import app as application
and where it's looking for my_main_module is presumably the python path set in the apache config, like so:
WSGIPythonPath /blah/blah/main_code_place
Which is correct for the main site, but I want to mysiteTEST to be running the modules in the test branch location. So perhaps I can override the python path somehow in the testBranch/wsgi_entry.py (and perhaps not?), but is there a simpler way that I can manage this in the apache config? I.e. can I somehow specify one WSGIPythonPath for /mysite, and another for /mysiteTEST?

Answer 1

Set up multiple virtualhosts:
<VirtualHost your.ip:80>
ServerName blahblah
ServerAdmin blahblah#blah.com
WSGIDaemonProcess blahblah user=b group=lah threads=5
WSGIScriptAlias /mysite /blah/blah/wsgi_entry.py
<Directory /blah/blah>
Options Indexes FollowSymLinks Includes ExecCGI
WSGIScriptReloading On
WSGIProcessGroup blahblah
WSGIApplicationGroup %{GLOBAL}
Order allow,deny
Allow from all
</Directory>
</VirtualHost>
<VirtualHost your.ip:80>
ServerName blahblahTEST
ServerAdmin blahblah#blah.com
WSGIDaemonProcess blahblahtest user=b group=lah threads=5
WSGIScriptAlias /mysiteTEST /blah/blah/testBranch/wsgi_entry.py
<Directory /blah/blah/testBranch>
Options Indexes FollowSymLinks Includes ExecCGI
WSGIScriptReloading On
WSGIProcessGroup blahblah
WSGIApplicationGroup %{GLOBAL}
Order allow,deny
Allow from all
</Directory>
</VirtualHost>

Answer 2

I ended up solving this by adding a single line to modify the path in the wsgi entry point for the alternate code version (i.e. the file referenced in the apache config line "WSGIScriptAlias /mysiteTEST /blah/blah/testBranch/wsgi_entry.py" in my example). The line overrides the wsgi configured python search path. Not the apache config only solution I wanted, but it's only a single line addition and it does the job:
import sys
sys.path.insert(0, '<path for alternate code modules>')
from my_main_module import app as application