tracts.driver_utils.collapse_identical_start_params

collapse_identical_start_params(start_params, step_label)

Collapse repeated identical starting-parameter sets to a single repetition.

This is used when all generated starting parameters for a step are the same, for example because the inputs were specified as single fixed values or because ancestry-fixed parameters made every draw collapse to the same point.

Parameters:

• start_params (list[ndarray]) – Candidate starting-parameter sets for one optimization step.

• step_label (str) – Human-readable label used in the warning message (for example, "step 1" or "step 2").

Returns:

The original list if it contains zero or one entry, or a single-entry list containing the unique start if every entry is identical.

Return type:

list[ndarray]