us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_alpine3.7_x64:2872be8abc221922814403d8c793b95f7542f7e7@sha256:9c1ee0b285cb6cd3b4734e3fc0eaa5fa1ee6230f55d87cc21e7364abb1b8c58c