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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 items_overlap_with_suffix(left, lsuffix, right, rsuffix):
 """ If two indices overlap, add suffixes to overlapping entries. If corresponding suffix is empty, the entry is simply converted to string. """

    to_rename = left.intersection(right)
    if len(to_rename) == 0:
        return left, right
    else:
        if not lsuffix and not rsuffix:
            raise ValueError('columns overlap but no suffix specified: '
                             '{rename}'.format(rename=to_rename))

        def renamer(x, suffix):
            """Rename the left and right indices.

            If there is overlap, and suffix is not None, add
            suffix, otherwise, leave it as-is.

            Parameters
            ----------
            x : original column name
            suffix : str or None

            Returns
            -------
            x : renamed column name
            """
            if x in to_rename and suffix is not None:
                return '{x}{suffix}'.format(x=x, suffix=suffix)
            return x

        lrenamer = partial(renamer, suffix=lsuffix)
        rrenamer = partial(renamer, suffix=rsuffix)

        return (_transform_index(left, lrenamer),
                _transform_index(right, rrenamer))