OpenHome/venv/Lib/site-packages/sqlalchemy/util/concurrency.py

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2021-07-21 21:33:05 +02:00
from . import compat
have_greenlet = False
if compat.py3k:
try:
import greenlet # noqa F401
except ImportError:
pass
else:
have_greenlet = True
from ._concurrency_py3k import await_only
from ._concurrency_py3k import await_fallback
from ._concurrency_py3k import greenlet_spawn
from ._concurrency_py3k import is_exit_exception
from ._concurrency_py3k import AsyncAdaptedLock
from ._concurrency_py3k import _util_async_run # noqa F401
from ._concurrency_py3k import (
_util_async_run_coroutine_function,
) # noqa F401, E501
from ._concurrency_py3k import asyncio # noqa F401
if not have_greenlet:
asyncio = None # noqa F811
def _not_implemented():
# this conditional is to prevent pylance from considering
# greenlet_spawn() etc as "no return" and dimming out code below it
if have_greenlet:
return None
if not compat.py3k:
raise ValueError("Cannot use this function in py2.")
else:
raise ValueError(
"the greenlet library is required to use this function."
)
def is_exit_exception(e): # noqa F811
return not isinstance(e, Exception)
def await_only(thing): # noqa F811
_not_implemented()
def await_fallback(thing): # noqa F81
return thing
def greenlet_spawn(fn, *args, **kw): # noqa F81
_not_implemented()
def AsyncAdaptedLock(*args, **kw): # noqa F81
_not_implemented()
def _util_async_run(fn, *arg, **kw): # noqa F81
return fn(*arg, **kw)
def _util_async_run_coroutine_function(fn, *arg, **kw): # noqa F81
_not_implemented()