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| author | Elvis Pranskevichus <elvis@magic.io> | 2018-07-30 10:42:43 (GMT) |
|---|---|---|
| committer | Victor Stinner <vstinner@redhat.com> | 2018-07-30 10:42:43 (GMT) |
| commit | 22d25085db2590932b3664ca32ab82c08f2eb2db (patch) | |
| tree | d173242dc2c035baf83bf36eb26d992618c1e796 /Lib/asyncio | |
| parent | 4e11c461ed39085b8495a35c9367b46d8a0d306d (diff) | |
| download | cpython-22d25085db2590932b3664ca32ab82c08f2eb2db.zip cpython-22d25085db2590932b3664ca32ab82c08f2eb2db.tar.gz cpython-22d25085db2590932b3664ca32ab82c08f2eb2db.tar.bz2 | |
bpo-34075: Deprecate non-ThreadPoolExecutor in loop.set_default_executor() (GH-8533)
Various asyncio internals expect that the default executor is a
`ThreadPoolExecutor`, so deprecate passing anything else to
`loop.set_default_executor()`.
Diffstat (limited to 'Lib/asyncio')
| -rw-r--r-- | Lib/asyncio/base_events.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py index dc0ca3f..75989a7 100644 --- a/Lib/asyncio/base_events.py +++ b/Lib/asyncio/base_events.py @@ -741,6 +741,12 @@ class BaseEventLoop(events.AbstractEventLoop): executor.submit(func, *args), loop=self) def set_default_executor(self, executor): + if not isinstance(executor, concurrent.futures.ThreadPoolExecutor): + warnings.warn( + 'Using the default executor that is not an instance of ' + 'ThreadPoolExecutor is deprecated and will be prohibited ' + 'in Python 3.9', + DeprecationWarning, 2) self._default_executor = executor def _getaddrinfo_debug(self, host, port, family, type, proto, flags): |