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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 voronoi(data, line_color=None, line_width=2, f_tooltip=None, cmap=None, max_area=1e4, alpha=220):
 """ Draw the voronoi tesselation of the points :param data: data access object :param line_color: line color :param line_width: line width :param f_tooltip: function to generate a tooltip on mouseover :param cmap: color map :param max_area: scaling constant to determine the color of the voronoi areas :param alpha: color alpha """

    from geoplotlib.layers import VoronoiLayer
    _global_config.layers.append(VoronoiLayer(data, line_color, line_width, f_tooltip, cmap, max_area, alpha))