You may have multiple Python versions installed on your machine – system Python, versions from pyenv, mise, asdf, uv, or the Windows registry (PEP 514). python-discovery finds the right one for you. Give it a requirement like python3.12 or >=3.11,<3.13, and python-discovery searches all known locations, verifies each candidate, and returns detailed metadata about the match. Results are cached to disk so repeated lookups are fast.