Short library to validate SPDX expressions. I have not found any working implementation in python and I wanted to mess around with pyparsing anyways.
This lib only exposes one function:
from pyspdx import validate
validate("MIT") # Valid, does nothing
validate("NotValid") # Throws ValueError
validate("(Apache-2.0 OR MIT) AND BSD-3-Clause") # Valid
validate("(DocumentRef-spdx-tool-1.2:LicenseRef-MIT-Style-2 OR (Apache-2.0 AND PostgreSQL OR OpenSSL)) AND (BSD-3-Clause OR Apache-2.0 WITH 389-exception)") # Valid