Google Cloud BigQuery Connection Client Library

The Google Cloud BigQuery Connection API client library (google-cloud-bigquery-connection) is a Python library designed to manage BigQuery connections to external data sources. It provides a programmatic interface for creating, updating, listing, and deleting connections, which are crucial for BigQuery to interact with other Google Cloud services (like Cloud Spanner, Cloud SQL) or external databases. As of April 2026, the current stable version is 1.21.0, and it is actively maintained with regular updates as part of the broader `google-cloud-python` ecosystem.