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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 _merge_dicts(first, second):
 """Merge the 'second' multiple-dictionary into the 'first' one."""

    new = deepcopy(first)
    for k, v in second.items():
        if isinstance(v, dict) and v:
            ret = _merge_dicts(new.get(k, dict()), v)
            new[k] = ret
        else:
            new[k] = second[k]
    return new