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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def split_kwargs(relaxation_kwds):
 """Split relaxation keywords to keywords for optimizer and others"""

    optimizer_keys_list = [
        'step_method',
        'linesearch',
        'eta_max',
        'eta',
        'm',
        'linesearch_first'
    ]
    optimizer_kwargs = { k:relaxation_kwds.pop(k) for k in optimizer_keys_list if k in relaxation_kwds }
    if 'm' in optimizer_kwargs:
        optimizer_kwargs['momentum'] = optimizer_kwargs.pop('m')
    return optimizer_kwargs, relaxation_kwds