Files
pytorch/torch/utils/_import_utils.py
PaliC 6162e650b0 [BE] remove torch deploy - conditionals (#158288)
This PR is part of the work to deprecate torch::deploy in OSS. Effectively it does 3 things to get started.
1. Remove test_deploy_interaction as we no longer need to worry about this
2. Remove all torch._running_with_deploy checks and use the False path always (surfaced 1)
3. Remove `USE_DEPLOY` and switch to the default path always

Note: MyPy does fail on a bunch of things here as a bunch of older files are touched. It may be better to fix these things on a separate PR

Pull Request resolved: https://github.com/pytorch/pytorch/pull/158288
Approved by: https://github.com/albanD
2025-07-29 17:40:49 +00:00

39 lines
1.2 KiB
Python

import functools
import importlib.util
from types import ModuleType
from typing import Optional
def _check_module_exists(name: str) -> bool:
r"""Returns if a top-level module with :attr:`name` exists *without**
importing it. This is generally safer than try-catch block around a
`import X`. It avoids third party libraries breaking assumptions of some of
our tests, e.g., setting multiprocessing start method when imported
(see librosa/#747, torchvision/#544).
"""
try:
spec = importlib.util.find_spec(name)
return spec is not None
except ImportError:
return False
@functools.lru_cache
def dill_available() -> bool:
return _check_module_exists("dill")
@functools.lru_cache
def import_dill() -> Optional[ModuleType]:
if not dill_available():
return None
import dill
# XXX: By default, dill writes the Pickler dispatch table to inject its
# own logic there. This globally affects the behavior of the standard library
# pickler for any user who transitively depends on this module!
# Undo this extension to avoid altering the behavior of the pickler globally.
dill.extend(use_dill=False)
return dill