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Add compatibility for newer sae_lens forward() return type #19

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Add compatibility for newer sae_lens forward() return type #19

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6 changes: 5 additions & 1 deletion sae_multid_feature_discovery/generate_feature_occurence_data.py
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Original file line number Diff line number Diff line change
Expand Up @@ -139,8 +139,12 @@ def next_batch_activations():
forward_pass = ae.forward(activations)
if isinstance(forward_pass, tuple):
hidden_sae = forward_pass[1]
else:
elif hasattr(forward_pass, "feature_acts"):
hidden_sae = forward_pass.feature_acts
else:
# Newer sae_lens returns reconstructed tensor from forward();
# use encode() to get feature activations instead
hidden_sae = ae.encode(activations)

nonzero_sae = hidden_sae.abs() > 1e-6
nonzero_sae_values = hidden_sae[nonzero_sae]
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