INFO: pip is looking at multiple versions of google-cloud-spanner[tracing] to determine which version is compatible with other requirements. This could take a while.
ERROR: Ignored the following versions that require a different python version: 0.44b0 Requires-Python >=3.8; 0.45b0 Requires-Python >=3.8; 0.46b0 Requires-Python >=3.8; 0.47b0 Requires-Python >=3.8; 0.48b0 Requires-Python >=3.8; 0.49b0 Requires-Python >=3.8; 0.49b1 Requires-Python >=3.8; 0.49b2 Requires-Python >=3.8; 0.50b0 Requires-Python >=3.8; 1.23.0 Requires-Python >=3.8; 1.24.0 Requires-Python >=3.8; 1.25.0 Requires-Python >=3.8; 1.26.0 Requires-Python >=3.8; 1.27.0 Requires-Python >=3.8; 1.28.0 Requires-Python >=3.8; 1.28.1 Requires-Python >=3.8; 1.28.2 Requires-Python >=3.8; 1.29.0 Requires-Python >=3.8; 5.0.0 Requires-Python >=3.8; 5.0.1 Requires-Python >=3.8; 5.1.0 Requires-Python >=3.9
ERROR: Could not find a version that satisfies the requirement mmh3>=5.0.1 (from google-cloud-spanner[tracing]) (from versions: 2.0, 2.2, 2.3, 2.3.1, 2.4, 2.5, 2.5.1, 3.0.0, 3.1.0, 4.0.0, 4.0.1, 4.1.0)
ERROR: No matching distribution found for mmh3>=5.0.1
nox > Session unit-3.7(protobuf_implementation='python') failed.