one server, same domain, different apps (example.com/ & example.com/tickets )?
It depends on the webserver you want to use. Let's go with apache as it is one of the most used web servers on the internet.

You install your wordpress installation into the /tickets subdirectory and install word-press as you normally would. This should install wordpress into the subdirectory.
Configure your Python-WSGI App with this configuration:

WSGIScriptAlias /pythonapp /var/www/path/to/my/wsgi.py
I want advice on how to do the following:
On the same server, I want to have two apps. One WordPress app and one Python app. At the same time, I want the root of my domain to be a static landing page.
Url structure I want to achieve:

example.com/   => static landing page
example.com/tickets => wordpress
example.com/pythonapp => python app

I have never done something like this before and searching for solutions didn't help.
Is it even possible? 
Is it better to use subdomains?
Is it better to use different servers?
How should I approach this?
Thanks in advance!