| # mypy: allow-untyped-defs | |
| import torch | |
| from torch._C import _ImperativeEngine as ImperativeEngine | |
| __all__ = ["VariableMeta", "Variable"] | |
| class VariableMeta(type): | |
| def __instancecheck__(cls, other): | |
| return isinstance(other, torch.Tensor) | |
| class Variable(torch._C._LegacyVariableBase, metaclass=VariableMeta): # type: ignore[misc] | |
| _execution_engine = ImperativeEngine() | |