Currently all the data objects in the Python API can only be created from their JSON representations. We should also have a similar approach for handling xml representation of the data objects.
It would enable users to fetch the data objects, especially the ones which are sent back to the server as payload in the request (All *Request classes in cert.py and key.py ) to be fetched using CLI and load them using the python API to make any more additions and submit to the server.

Example:
To modify an existing profile, the following operations can be done:

pki ca-profile-show --output

Using the client(python code):
profile_data = Profile.load_from_xml()
profile_data.add_input()
profile_data.remove_input()
...
profile_client.modify_profile(profile_data)

Would like to suggest to be part of 10.3 bucket.