from __future__ import absolute_import, unicode_literals from ..py_info import PythonInfo from ..py_spec import PythonSpec from .pep514 import discover_pythons class Pep514PythonInfo(PythonInfo): """ """ def propose_interpreters(spec, cache_dir, env): # see if PEP-514 entries are good # start with higher python versions in an effort to use the latest version available # and prefer PythonCore over conda pythons (as virtualenv is mostly used by non conda tools) existing = list(discover_pythons()) existing.sort( key=lambda i: tuple(-1 if j is None else j for j in i[1:4]) + (1 if i[0] == "PythonCore" else 0,), reverse=True ) for name, major, minor, arch, exe, _ in existing: # pre-filter if name in ("PythonCore", "ContinuumAnalytics"): name = "CPython" registry_spec = PythonSpec(None, name, major, minor, None, arch, exe) if registry_spec.satisfies(spec): interpreter = Pep514PythonInfo.from_exe(exe, cache_dir, env=env, raise_on_error=False) if interpreter is not None: if interpreter.satisfies(spec, impl_must_match=True): yield interpreter