In utils.random_fraction, I find the following code,

   # copy because shuffle works in place
    aux = copy.deepcopy(indx)

    # shuffle
    np.random.shuffle(indx)

    # select
    use = aux[:nb]
    unuse = aux[nb:]

About the shuffle, should it shuffle aux instead of index?

Examples ideas

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AFAICS from the docs this should work:

    - id: my_apply
      module: timeflux.nodes.apply
      class: ApplyMethod
      params:
        func: abs

but it fails with Node 'my_apply': __init__() missing 1 required positional argument: 'method', because the signature is

    def __init__(self, method, apply_mode='universal',
                 axis=0, closed='right', func=No