python-discovery
What is python-discovery?
python-discovery is a library for discovering Python interpreters installed on your machine. You may have multiple
Python versions from system packages, pyenv, mise,
asdf, uv, or the Windows registry (PEP 514). This library finds
the right one for you.
Give it a requirement like python3.12 or >=3.11,<3.13, and it searches all known locations, verifies each candidate,
and returns detailed metadata about the match. Results are cached to disk so repeated lookups are fast.
Usage
from pathlib import Path
from python_discovery import DiskCache, get_interpreter
cache = DiskCache(root=Path("~/.cache/python-discovery").expanduser())
result = get_interpreter("python3.12", cache=cache)
if result is not None:
print(result.executable) # /usr/bin/python3.12
print(result.implementation) # CPython
print(result.version_info[:3]) # (3, 12, 1)
The get_interpreter() function accepts various specification formats:
- Absolute path:
/usr/bin/python3.12 - Version:
3.12 - Implementation prefix:
cpython3.12 - Version specifier:
>=3.10,>=3.11,<3.13
Documentation
Full documentation is available at python-discovery.readthedocs.io
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