I found a mismatch in the Configuration interface when using python.
If this is due to my lacking python skills I'm very sorry.

The following example is given in the API documentation to read the description of the configuration interface:

import sys
import clingo

prg = clingo.Control()
print(prg.configuration.solve.__desc_models)

When using the clingo_main method using an Application

import sys
import clingo

class Application:
    def main(self, prg, files):
        print(prg.configuration.solve.__desc_models)

sys.exit(int(clingo.clingo_main(Application(), sys.argv[1:])))

I do get the following error:

print(prg.configuration.solve.__desc_models)

AttributeError: 'clingo.Configuration' object has no attribute '_Application__desc_models'