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52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
# Copyright (c) ONNX Project Contributors
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# SPDX-License-Identifier: Apache-2.0
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from __future__ import annotations
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import numpy as np
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from onnx.reference.op_run import OpRun
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def _specify_int64(indices, inverse_indices, counts):
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return (
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np.array(indices, dtype=np.int64),
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np.array(inverse_indices, dtype=np.int64),
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np.array(counts, dtype=np.int64),
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)
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class Unique(OpRun):
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def _run(self, x, axis=None, sorted=None): # type: ignore[override] # noqa: A002
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if axis is None or np.isnan(axis):
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y, indices, inverse_indices, counts = np.unique(x, True, True, True)
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else:
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y, indices, inverse_indices, counts = np.unique(
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x, True, True, True, axis=axis
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)
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if len(self.onnx_node.output) == 1:
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return (y,)
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if not sorted:
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argsorted_indices = np.argsort(indices)
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inverse_indices_map = dict(
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zip(argsorted_indices, np.arange(len(argsorted_indices)), strict=True)
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)
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indices = indices[argsorted_indices]
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y = np.take(x, indices, axis=0)
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inverse_indices = np.asarray(
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[inverse_indices_map[i] for i in inverse_indices], dtype=np.int64
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)
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counts = counts[argsorted_indices]
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indices, inverse_indices, counts = _specify_int64(
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indices, inverse_indices, counts
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)
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# numpy 2.0 has a different behavior than numpy 1.x.
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inverse_indices = inverse_indices.reshape(-1)
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if len(self.onnx_node.output) == 2:
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return (y, indices)
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if len(self.onnx_node.output) == 3:
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return (y, indices, inverse_indices)
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return (y, indices, inverse_indices, counts)
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