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Showing content from https://pymongo.readthedocs.io/en/stable/api/pymongo/topology_description.html below:

topology_description – An object representation of a deployment of MongoDB servers.

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Represent a deployment of MongoDB servers.

See also

This module is compatible with both the synchronous and asynchronous PyMongo APIs.

class pymongo.topology_description.TopologyDescription¶

Representation of a deployment of MongoDB servers.

Parameters:

• topology_type (int) – initial type

• server_descriptions (dict[_Address, ServerDescription]) – dict of (address, ServerDescription) for all seeds

• replica_set_name (Optional[str]) – replica set name or None

• max_set_version (Optional[int]) – greatest setVersion seen from a primary, or None

• max_election_id (Optional[ObjectId]) – greatest electionId seen from a primary, or None

• topology_settings (Any) – a TopologySettings

apply_selector(selector, address=None, custom_selector=None)¶

List of servers matching the provided selector(s).

Parameters:

• selector (Any) – a callable that takes a Selection as input and returns a Selection as output. For example, an instance of a read preference from read_preferences.

• address (Tuple[str, int | None] | None) – A server address to select.

• custom_selector (Callable[[List[ServerDescription]], List[ServerDescription]] | None) – A callable that augments server selection rules. Accepts a list of ServerDescription objects and return a list of server descriptions that should be considered suitable for the desired operation.

Return type:

list[ServerDescription]

Added in version 3.4.

check_compatible()¶

Raise ConfigurationError if any server is incompatible.

A server is incompatible if its wire protocol version range does not overlap with PyMongo’s.

Return type:

None

property common_wire_version: int | None¶

Minimum of all servers’ max wire versions, or None.

property has_known_servers: bool¶

Whether there are any Servers of types besides Unknown.

has_readable_server(read_preference=Primary())¶

Does this topology have any readable servers available matching the given read preference?

Parameters:

read_preference (_ServerMode) – an instance of a read preference from read_preferences. Defaults to PRIMARY.

Return type:

bool

Note

When connected directly to a single server this method always returns True.

Added in version 3.4.

has_writable_server()¶

Does this topology have a writable server available?

Note

When connected directly to a single server this method always returns True.

Added in version 3.4.

Return type:

bool

property known_servers: list[ServerDescription]¶

List of Servers of types besides Unknown.

property logical_session_timeout_minutes: int | None¶

Minimum logical session timeout, or None.

property max_election_id: ObjectId | None¶

Greatest electionId seen from a primary, or None.

property max_set_version: int | None¶

Greatest setVersion seen from a primary, or None.

property readable_servers: list[ServerDescription]¶

List of readable Servers.

property replica_set_name: str | None¶

The replica set name.

reset()¶

A copy of this description, with all servers marked Unknown.

Return type:

TopologyDescription

reset_server(address)¶

A copy of this description, with one server marked Unknown.

Parameters:

address (Tuple[str, int | None])

Return type:

TopologyDescription

server_descriptions()¶

dict of (address, ServerDescription).

Return type:

dict[Tuple[str, int | None], ServerDescription]

property topology_type: int¶

The type of this topology.

property topology_type_name: str¶

The topology type as a human readable string.

Added in version 3.4.

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