Avoid `collections` deprecation warning (#72239)
Summary:
Avoids the following deprecation warning:
```python
loss.backward(*args, **kwargs)
/usr/local/lib/python3.7/dist-packages/torch/tensor.py:245: in backward
torch.autograd.backward(self, gradient, retain_graph, create_graph, inputs=inputs)
/usr/local/lib/python3.7/dist-packages/torch/autograd/__init__.py:147: in backward
allow_unreachable=True, accumulate_grad=True) # allow_unreachable flag
/usr/local/lib/python3.7/dist-packages/torch/autograd/function.py:89: in apply
return self._forward_cls.backward(self, *args) # type: ignore
/usr/local/lib/python3.7/dist-packages/torch/nn/parallel/_functions.py:34: in backward
return (None,) + ReduceAddCoalesced.apply(ctx.input_device, ctx.num_inputs, *grad_outputs)
/usr/local/lib/python3.7/dist-packages/torch/nn/parallel/_functions.py:45: in forward
return comm.reduce_add_coalesced(grads_, destination)
/usr/local/lib/python3.7/dist-packages/torch/nn/parallel/comm.py:143: in reduce_add_coalesced
flat_result = reduce_add(flat_tensors, destination)
/usr/local/lib/python3.7/dist-packages/torch/nn/parallel/comm.py:96: in reduce_add
nccl.reduce(inputs, output=result, root=root_index)
/usr/local/lib/python3.7/dist-packages/torch/cuda/nccl.py:69: in reduce
_check_sequence_type(inputs)
/usr/local/lib/python3.7/dist-packages/torch/cuda/nccl.py:48: in _check_sequence_type
if not isinstance(inputs, collections.Container) or isinstance(inputs, torch.Tensor):
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
name = 'Container'
def __getattr__(name):
# For backwards compatibility, continue to make the collections ABCs
# through Python 3.6 available through the collections module.
# Note, no new collections ABCs were added in Python 3.7
if name in _collections_abc.__all__:
obj = getattr(_collections_abc, name)
import warnings
warnings.warn("Using or importing the ABCs from 'collections' instead "
"of from 'collections.abc' is deprecated since Python 3.3,"
"and in 3.9 it will stop working",
> DeprecationWarning, stacklevel=2)
E DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3,and in 3.9 it will stop working
/usr/lib/python3.7/collections/__init__.py:52: DeprecationWarning
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72239
Reviewed By: ngimel
Differential Revision: D34387815
Pulled By: mruberry
fbshipit-source-id: 30c9b4fe518351bc9a6f211269e27ee3ab73a13c
(cherry picked from commit 1f68cdfac5875b56893b6b7ab3e8db96897f128b)
