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Make sure all individuals (parents and offspring) are assigned a valid, unique index #376

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Make sure all individuals (parents and offspring) are assigned a valid, unique index #376

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2 changes: 2 additions & 0 deletions cgp/ea/mu_plus_lambda.py
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Original file line number Diff line number Diff line change
Expand Up @@ -142,6 +142,8 @@ def step(
# concatenating the parent population to the offspring
# population instead of the other way around
combined = offsprings + pop.parents
assert all(ind.idx is not None for ind in combined)
assert len(set(ind.idx for ind in combined)) == len(combined)
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@HenrikMettler HenrikMettler Dec 19, 2022

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Maybe below could be easier to understand? (No preference though, both ways should be fine)

assert len(set(ind.idx for ind in combined)) == len([int.idx for ind in combined])


# we follow a two-step process for selection of new parents:
# we first determine the fitness for all individuals, then, if
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