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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 maybe_convert_indices(indices, n):
 """ Attempt to convert indices into valid, positive indices. If we have negative indices, translate to positive here. If we have indices that are out-of-bounds, raise an IndexError. Parameters indices : array-like The array of indices that we are to convert. n : int The number of elements in the array that we are indexing. Returns ------- valid_indices : array-like An array-like of positive indices that correspond to the ones that were passed in initially to this function. Raises ------ IndexError : one of the converted indices either exceeded the number of elements (specified by `n`) OR was still negative. """


    if isinstance(indices, list):
        indices = np.array(indices)
        if len(indices) == 0:
            # If list is empty, np.array will return float and cause indexing
            # errors.
            return np.empty(0, dtype=np.intp)

    mask = indices < 0
    if mask.any():
        indices = indices.copy()
        indices[mask] += n

    mask = (indices >= n) | (indices < 0)
    if mask.any():
        raise IndexError("indices are out-of-bounds")
    return indices