如何使用pydocumentdb计数？

from pydocumentdb import document_client
from pydocumentdb import documents

endpoint = 'your_cosmosdb_endpoint'
master_key = 'your_cosmosdb_master_key'
client = document_client.DocumentClient(endpoint, {'masterKey': master_key})

database_link = 'dbs/your_database_id'
collection_link = database_link + '/colls/your_collection_id'

query = "SELECT VALUE COUNT(1) FROM c"
options = {'enableCrossPartitionQuery': True}
result = client.QueryDocuments(collection_link, query, options)
count = list(result)[0]
print(count)