Dynamic template mappings in python DSL

doc.py

from elasticsearch_dsl import DocType, Object, MetaField

class MyDoc(DocType):
    inner = Object()
    
    class Meta:
        dynamic_templates = MetaField([
            {
                'strings_in_inner': {
                    'path_match': 'inner.*',
                    'match_mapping_type': 'string',
                    'mapping': {'type': 'string', 'index': 'not_analyzed'}
                }
            }
        ])