ResourceWarning: Implicitly cleaning up

Describe the bug
warning message from

python -W error -c "import monai"

with pytorch 2.0

Traceback (most recent call last):
  File "/usr/local/anaconda3/envs/py38/lib/python3.8/weakref.py", line 642, in _exitfunc
    f()
  File "/usr/local/anaconda3/envs/py38/lib/python3.8/weakref.py", line 566, in __call__
    return info.func(*info.args, **(info.kwargs or {}))
  File "/usr/local/anaconda3/envs/py38/lib/python3.8/tempfile.py", line 818, in _cleanup
    _warnings.warn(warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <TemporaryDirectory '/var/folders/6f/fdkl7m0x7sz3nj_t7p3ccgz00000gp/T/tmpqtvvcx_b'>

debugging further looks like it's triggered via importing pytorch ignite

  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/ignite/handlers/checkpoint.py(17)<module>()
-> from torch.distributed.optim import ZeroRedundancyOptimizer
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/optim/__init__.py(20)<module>()
-> from .named_optimizer import _NamedOptimizer
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/optim/named_optimizer.py(10)<module>()
-> from torch.distributed._shard.sharded_tensor import ShardedTensor
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(961)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/_shard/__init__.py(1)<module>()
-> from .api import (
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/_shard/api.py(6)<module>()
-> from torch.distributed._shard.sharded_tensor import (
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/_shard/sharded_tensor/__init__.py(9)<module>()
-> from torch.distributed._shard.partial_tensor import _PartialTensor
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/_shard/partial_tensor.py(8)<module>()
-> from torch.distributed.nn.functional import (
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(961)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/nn/__init__.py(3)<module>()
-> from .api.remote_module import RemoteModule
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/nn/api/remote_module.py(24)<module>()
-> from torch.distributed.nn.jit import instantiator
  <frozen importlib._bootstrap>(1042)_handle_fromlist()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  <frozen importlib._bootstrap>(991)_find_and_load()
  <frozen importlib._bootstrap>(975)_find_and_load_unlocked()
  <frozen importlib._bootstrap>(671)_load_unlocked()
  <frozen importlib._bootstrap_external>(843)exec_module()
  <frozen importlib._bootstrap>(219)_call_with_frames_removed()
  /usr/local/anaconda3/envs/py38/lib/python3.8/site-packages/torch/distributed/nn/jit/instantiator.py(19)<module>()
-> _TEMP_DIR = tempfile.TemporaryDirectory()
  /usr/local/anaconda3/envs/py38/lib/python3.8/tempfile.py(781)__init__()
-> self._finalizer = _weakref.finalize(
> /usr/local/anaconda3/envs/py38/lib/python3.8/weakref.py(519)__init__()
-> if len(args) >= 3:

(fyi @vfdev-5 )

Tái hiện cảnh báo bằng python -W error -c "import monai" và kiểm tra chuỗi import qua PyTorch Ignite đến torch.distributed.nn.jit.instantiator.py, nơi thư mục tạm thời được tạo. Xác định liệu MONAI có thể tránh kích hoạt cảnh báo dọn dẹp hay không; được xem là hoàn tất khi việc import không còn tạo ra ResourceWarning đã nêu.