Optional "info" object for each entry

[nikohansen]

It would be quite practical to have the option to maintain an "additional information" list where, for example, the user could store the respective solutions.

nda = moarchiving.BiobjectiveNondominatedSortedList()
nda.add(fun2(x), info=x)
nda.add(fun2(xa), info={'x': xa, 'note': 'xa seems to rock'})
nda.add(fun2(xb))
assert nda.info is None or len(nda) == len(nda.info)
print(nda.info)  # nda has an info property
[[0, 1, 2], {'x': [1, 2, 3], 'note': 'xa seems to rock'}, None]

Methods that need to be modified are

• add and _add_at
• remove

The list can be created only when an optional info argument is used for the first time to avoid always maintaining an info list of None elements.

[naceee]

Do you think it could be useful to also have the possibility to add a list of infos together with the list of f values when initializing the object? In 3 dimensions for example, adding points to the archive at initialization is much faster than adding them separately after.

[nikohansen]

Do you think it could be useful to also have the possibility to add a list of infos together with the list of f values when initializing the object?

Makes perfectly sense to me.