| import torch | |
| from torch._six import with_metaclass | |
| class VariableMeta(type): | |
| def __instancecheck__(cls, other): | |
| return isinstance(other, torch.Tensor) | |
| # mypy doesn't understand torch._six.with_metaclass | |
| class Variable(with_metaclass(VariableMeta, torch._C._LegacyVariableBase)): # type: ignore | |
| pass | |
| from torch._C import _ImperativeEngine as ImperativeEngine | |
| Variable._execution_engine = ImperativeEngine() # type: ignore |