moto/scripts/template/lib/models.py.j2

"""{{ service_class }}Backend class with methods for supported APIs."""
from boto3 import Session

from moto.core import BaseBackend, BaseModel


class {{ service_class }}Backend(BaseBackend):
    """Implementation of {{ service_class }} APIs."""

    def __init__(self, region_name=None):
        self.region_name = region_name

    def reset(self):
        """Re-initialize all attributes for this instance."""
        region_name = self.region_name
        self.__dict__ = {}
        self.__init__(region_name)

    # add methods from here


{{ escaped_service }}_backends = {}
for available_region in Session().get_available_regions("{{ service }}"):
    {{ escaped_service }}_backends[available_region] = {{ service_class }}Backend()
for available_region in Session().get_available_regions(
    "{{ service }}", partition_name="aws-us-gov"
):
    {{ escaped_service }}_backends[available_region] = {{ service_class }}Backend()
for available_region in Session().get_available_regions(
    "{{ service }}", partition_name="aws-cn"
):
    {{ escaped_service }}_backends[available_region] = {{ service_class }}Backend()