_helpers.py•1.55 kB
import os
import sys
from typing import TYPE_CHECKING
__all__ = ("cached_property", "under_cached_property")
NO_EXTENSIONS = bool(os.environ.get("PROPCACHE_NO_EXTENSIONS")) # type: bool
if sys.implementation.name != "cpython":
NO_EXTENSIONS = True
# isort: off
if TYPE_CHECKING:
from ._helpers_py import cached_property as cached_property_py
from ._helpers_py import under_cached_property as under_cached_property_py
cached_property = cached_property_py
under_cached_property = under_cached_property_py
elif not NO_EXTENSIONS: # pragma: no branch
try:
from ._helpers_c import cached_property as cached_property_c # type: ignore[attr-defined, unused-ignore]
from ._helpers_c import under_cached_property as under_cached_property_c # type: ignore[attr-defined, unused-ignore]
cached_property = cached_property_c
under_cached_property = under_cached_property_c
except ImportError: # pragma: no cover
from ._helpers_py import cached_property as cached_property_py
from ._helpers_py import under_cached_property as under_cached_property_py
cached_property = cached_property_py # type: ignore[assignment, misc]
under_cached_property = under_cached_property_py
else:
from ._helpers_py import cached_property as cached_property_py
from ._helpers_py import under_cached_property as under_cached_property_py
cached_property = cached_property_py # type: ignore[assignment, misc]
under_cached_property = under_cached_property_py
# isort: on