import os import sys __all__ = ("_Quoter", "_Unquoter") NO_EXTENSIONS = bool(os.environ.get("YARL_NO_EXTENSIONS")) # type: bool if sys.implementation.name != "cpython": NO_EXTENSIONS = True if not NO_EXTENSIONS: # pragma: no branch try: from ._quoting_c import _Quoter, _Unquoter # type: ignore[assignment] except ImportError: # pragma: no cover from ._quoting_py import _Quoter, _Unquoter # type: ignore[assignment] else: from ._quoting_py import _Quoter, _Unquoter # type: ignore[assignment]