>>> db = client.test
>>> db.view.drop()
>>> db.create_collection('view', viewOn='coll')
>>> db.view.count_documents({})
0
>>> db.view.estimated_document_count()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/shane/git/mongo-python-driver/pymongo/collection.py", line 1495, in estimated_document_count
    return self.__database.client._retryable_read(
  File "/Users/shane/git/mongo-python-driver/pymongo/mongo_client.py", line 1384, in _retryable_read
    return func(session, server, sock_info, slave_ok)
  File "/Users/shane/git/mongo-python-driver/pymongo/collection.py", line 1484, in _cmd
    result = self._aggregate_one_result(
  File "/Users/shane/git/mongo-python-driver/pymongo/collection.py", line 1436, in _aggregate_one_result
    result = self._command(
  File "/Users/shane/git/mongo-python-driver/pymongo/collection.py", line 221, in _command
    return sock_info.command(
  File "/Users/shane/git/mongo-python-driver/pymongo/pool.py", line 718, in command
    return command(self, dbname, spec, slave_ok,
  File "/Users/shane/git/mongo-python-driver/pymongo/network.py", line 158, in command
    helpers._check_command_response(
  File "/Users/shane/git/mongo-python-driver/pymongo/helpers.py", line 167, in _check_command_response
    raise OperationFailure(errmsg, code, response, max_wire_version)
pymongo.errors.OperationFailure: PlanExecutor error during aggregation :: caused by :: Namespace test.view is a view, not a collection, full error: {'ok': 0.0, 'errmsg': 'PlanExecutor error during aggregation :: caused by :: Namespace test.view is a view, not a collection', 'code': 166, 'codeName': 'CommandNotSupportedOnView', '$clusterTime': {'clusterTime': Timestamp(1630345764, 1), 'signature': {'hash': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00', 'keyId': 0}}, 'operationTime': Timestamp(1630345764, 1)}