mirror of
https://github.com/facebookresearch/pytorch3d.git
synced 2025-08-03 04:12:48 +08:00
5ecce83217
Summary: Restore compatibility with PyTorch 1.4 and 1.5, and a few lint fixes. Reviewed By: patricklabatut Differential Revision: D30048115 fbshipit-source-id: ee05efa7c625f6079fb06a3cc23be93e48df9433
52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
# Copyright (c) Facebook, Inc. and its affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the BSD-style license found in the
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# LICENSE file in the root directory of this source tree.
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from typing import Tuple
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import torch
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"""
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Some functions which depend on PyTorch versions.
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"""
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def solve(A: torch.Tensor, B: torch.Tensor) -> torch.Tensor: # pragma: no cover
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"""
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Like torch.linalg.solve, tries to return X
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such that AX=B, with A square.
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"""
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if hasattr(torch, "linalg") and hasattr(torch.linalg, "solve"):
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# PyTorch version >= 1.8.0
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return torch.linalg.solve(A, B)
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return torch.solve(B, A).solution
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def lstsq(A: torch.Tensor, B: torch.Tensor) -> torch.Tensor: # pragma: no cover
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"""
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Like torch.linalg.lstsq, tries to return X
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such that AX=B.
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"""
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if hasattr(torch, "linalg") and hasattr(torch.linalg, "lstsq"):
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# PyTorch version >= 1.9
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return torch.linalg.lstsq(A, B).solution
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solution = torch.lstsq(B, A).solution
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if A.shape[1] < A.shape[0]:
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return solution[: A.shape[1]]
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return solution
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def qr(A: torch.Tensor) -> Tuple[torch.Tensor, torch.Tensor]: # pragma: no cover
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"""
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Like torch.linalg.qr.
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"""
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if hasattr(torch, "linalg") and hasattr(torch.linalg, "qr"):
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# PyTorch version >= 1.9
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return torch.linalg.qr(A)
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return torch.qr(A)
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