Make pretty print mode the default. Turn off using pretty=false. This makes use by humans (e.g. in browser) or printing when debugging easier. With gzip and other compression the extra whitespace is not a major issue. Idea from: https://www.vinaysahni.com/best-practices-for-a-pragmatic-restful-api#pretty-print-gzip

try:
    # Python 3+.
    from xmlrpc import client, server
    server.SimpleXMLRPCDispatcher
except (ImportError, AttributeError):
    # Python 2.
    import xmlrpclib as client
    import SimpleXMLRPCServer as server