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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 arrays_to_mgr(arrays, arr_names, index, columns, dtype=None):
 """ Segregate Series based on type and coerce into matrices. Needs to handle a lot of exceptional cases. """

    # figure out the index, if necessary
    if index is None:
        index = extract_index(arrays)
    else:
        index = ensure_index(index)

    # don't force copy because getting jammed in an ndarray anyway
    arrays = _homogenize(arrays, index, dtype)

    # from BlockManager perspective
    axes = [ensure_index(columns), index]

    return create_block_manager_from_arrays(arrays, arr_names, axes)