`from werkzeug.middleware.proxy_fix import ProxyFix` needed?

[porteusconf]

Per https://werkzeug.palletsprojects.com/en/0.16.x/middleware/proxy_fix/#module-werkzeug.middleware.proxy_fix

To get rid of error below I had to edit line 23 to be:

from werkzeug.middleware.proxy_fix import ProxyFix

Seem to fix this error:

  File "forna_server.py", line 23, in <module>
    from werkzeug.contrib.fixers import ProxyFix
ImportError: No module named contrib.fixers

For the record, after changing line 23 I was able to run forma_server and I think all the steps I used are below...

$ conda create --name py2 python=2.7
$ conda activate py2
(py2) $ conda config --add channels defaults
(py2) $ conda config --add channels bioconda
(py2) $ conda config --add channels conda-forge
(py2) $ conda install forgi viennarna
(py2) $  python forna_server.py -s -d -p 54321
 * Cleaning up database
 * Starting static
 * Serving Flask app "forna_server" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Cleaning up database
 * Starting static

Site served in above example at http://localhost:54321

P.S. Now if I can just get the API working ;-) But I'll add a new issue for when I figure out how to fix this:

URS0000000001: ERROR (400) - Secondary structure parsing error: __init__() takes at least 3 arguments (1 given)