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from dataclasses import dataclass
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from typing import Optional
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from colossalai.tensor.distspec import DistPlacementPattern, _DistSpec
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from colossalai.tensor.process_group import ProcessGroup
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from .compute_spec import ComputeSpec
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@dataclass
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class ColoTensorSpec:
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""" ColoTensorSpec
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A data class for specifications of the `ColoTensor`.
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It contains attributes of `ProcessGroup`, `_DistSpec`, `ComputeSpec`.
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The latter two attributes are optional. If not set, they are default value is `Replicate()` and `None`.
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"""
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pg: ProcessGroup
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dist_attr: Optional[_DistSpec] = _DistSpec(DistPlacementPattern.REPLICATE)
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compute_attr: Optional[ComputeSpec] = None
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