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Fix Monitor bug with preallocated buffers and torch.cat #761

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Fix Monitor bug with preallocated buffers and torch.cat #761

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8 changes: 7 additions & 1 deletion bindsnet/network/monitors.py
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Original file line number Diff line number Diff line change
Expand Up @@ -86,7 +86,13 @@ def get(self, var: str) -> torch.Tensor:
if self.clean:
return_logs = torch.empty(0, device=self.device)
else:
return_logs = torch.cat(self.recording[var], 0)
# If the actual run length is shorter than the preallocated time,
# some placeholders remain and break torch.cat, so we drop them.
entries = [e for e in self.recording[var] if torch.is_tensor(e)]
if len(entries) == 0:
return_logs = torch.empty(0, device=self.device)
else:
return_logs = torch.cat(entries, 0)
if self.time is None:
self.recording[var] = []
return return_logs
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