0.4.0-pre import ignite broken on Windows machine with cpu-only #1110
Description
🐛 Bug description
import ignite fails with the following exception:
>>> import ignite
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\Foo\anaconda3\envs\ignite\lib\site-packages\ignite\__init__.py", line 2, in <module>
import ignite.distributed
File "C:\Users\Foo\anaconda3\envs\ignite\lib\site-packages\ignite\distributed\__init__.py", line 1, in <module>
from ignite.distributed.utils import *
File "C:\Users\Foo\anaconda3\envs\ignite\lib\site-packages\ignite\distributed\utils.py", line 9, in <module>
from ignite.distributed.comp_models import _SerialModel, has_xla_support, registered_computation_models
File "C:\Users\Foo\anaconda3\envs\ignite\lib\site-packages\ignite\distributed\comp_models\__init__.py", line 2, in <module>
from ignite.distributed.comp_models.native import _NativeDistModel
File "C:\Users\Foo\anaconda3\envs\ignite\lib\site-packages\ignite\distributed\comp_models\native.py", line 13, in <module>
class _NativeDistModel(ComputationModel):
File "C:\Users\Foo\anaconda3\envs\ignite\lib\site-packages\ignite\distributed\comp_models\native.py", line 33, in _NativeDistModel
for name in [dist.Backend.NCCL, dist.Backend.GLOO, dist.Backend.MPI]
AttributeError: module 'torch.distributed' has no attribute 'Backend'
When using ignite 0.4.0 pre-release on a Windows machine with no GPU (i.e. cpu-only)
Environment
- PyTorch Version (e.g., 1.4): 1.5.0
- Ignite Version (e.g., 0.3.0): 0.4.0 pre-release
- OS (e.g., Linux): Windows 10
- How you installed Ignite (
conda,pip, source):conda install ignite -c pytorch-nightly - Python version: 3.6.10
- Any other relevant information:
- Machine has no GPU, using CPU-only
- Installed from scratch on a new, clean conda environment