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added device call after the bcast in the getitem #790

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Jun 9, 2021
Merged

added device call after the bcast in the getitem #790

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9e312fb
added device call after the bcast in the getitem
coquelin77 Jun 8, 2021
f80c3b2
changelog update
coquelin77 Jun 8, 2021
df6dd02
added comment clarifying when the added code can be removed
coquelin77 Jun 9, 2021
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -41,6 +41,7 @@ Example on 2 processes:
- [#768](https://github.com/helmholtz-analytics/heat/pull/768) Fixed an issue where `deg2rad` and `rad2deg`are not working with the 'out' parameter.
- [#785](https://github.com/helmholtz-analytics/heat/pull/785) Removed `storage_offset` when finding the mpi buffer (`communication. MPICommunication.as_mpi_memory()`).
- [#785](https://github.com/helmholtz-analytics/heat/pull/785) added allowance for 1 dimensional non-contiguous local tensors in `communication. MPICommunication.mpi_type_and_elements_of()`
- [#790](https://github.com/helmholtz-analytics/heat/pull/790) catch incorrect device after `bcast` in `DNDarray.__getitem__`
### Linear Algebra
- [#718](https://github.com/helmholtz-analytics/heat/pull/718) New feature: `trace()`
- [#768](https://github.com/helmholtz-analytics/heat/pull/768) New feature: unary positive and negative operations
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3 changes: 3 additions & 0 deletions heat/core/dndarray.py
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Expand Up @@ -883,6 +883,9 @@ def __getitem__(self, key: Union[int, Tuple[int, ...], List[int, ...]]) -> DNDar
# broadcast result
# TODO: Replace with `self.comm.Bcast(arr, root=active_rank)` after fixing #784
arr = self.comm.bcast(arr, root=active_rank)
if arr.device != self.larray.device:
# todo: remove when unnecessary (also after #784)
arr = arr.to(device=self.larray.device)

return DNDarray(
arr.type(l_dtype),
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