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remove useless system_idx check #351

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Merged
merged 1 commit into from
Nov 23, 2025
Merged

remove useless system_idx check #351

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6 changes: 1 addition & 5 deletions torch_sim/state.py
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Original file line number Diff line number Diff line change
Expand Up @@ -172,11 +172,7 @@ def n_atoms(self) -> int:
@property
def n_atoms_per_system(self) -> torch.Tensor:
"""Number of atoms per system."""
return (
self.system_idx.bincount()
if self.system_idx is not None
else torch.tensor([self.n_atoms], device=self.device)
)
return self.system_idx.bincount()

@property
def n_systems(self) -> int:
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