A project is the top-level container in the BigQuery API: it is tied closely to billing, and can provide default access control across all its datasets. If no project is passed to the client container, the library attempts to infer a project using the environment (including explicit environment variables, GAE, and GCE).

To override the project inferred from the environment, pass an explicit project to the :class:`~google.cloud.bigquery.client.Client` constructor, or to either of the alternative classmethod factories:

from google.cloud import bigquery
client = bigquery.Client(project='PROJECT_ID')

Each project has an access control list granting reader / writer / owner permission to one or more entities. This list cannot be queried or set via the API; it must be managed using the Google Developer Console.