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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 fig_to_html(fig=None, template='base.html', tiles=None, crs=None, epsg=None, embed_links=False, float_precision=6):
 """ Convert a Matplotlib Figure to a Leaflet map Parameters fig : figure, default gcf() Figure used to convert to map template : string, default 'base.html' The Jinja2 template to use tiles : string or tuple The tiles argument is used to control the map tile source in the Leaflet map. Several simple shortcuts exist: 'osm', 'mapquest open', and 'mapbox bright' may be specified to use those tiles. The argument may be a tuple of two elements. The first element is the tile URL to use in the map's TileLayer, the second argument is the attribution to display. See http://leafletjs.com/reference.html#tilelayer for more information on formatting the URL. See also maptiles.mapbox() for specifying Mapbox tiles based on a Mapbox map ID. crs : dict, default assumes lon/lat pyproj definition of the current figure. If None, then it is assumed the plot is longitude, latitude in X, Y. epsg : int, default 4326 The EPSG code of the current plot. This can be used in place of the 'crs' parameter. embed_links : bool, default False Whether external links (except tiles) shall be explicitly embedded in the final html. float_precision : int, default 6 The precision to be used for the floats in the embedded geojson. Note: only one of 'crs' or 'epsg' may be specified. Both may be None, in which case the plot is assumed to be longitude / latitude. Returns ------- String of html of the resulting webpage """

    if tiles is None:
        tiles = maptiles.osm
    elif isinstance(tiles, six.string_types):
        if tiles not in maptiles.tiles:
            raise ValueError('Unknown tile source "{}"'.format(tiles))
        else:
            tiles = maptiles.tiles[tiles]

    template = env.get_template(template)

    if fig is None:
        fig = plt.gcf()
    dpi = fig.get_dpi()

    renderer = LeafletRenderer(crs=crs, epsg=epsg)
    exporter = Exporter(renderer)
    exporter.run(fig)

    attribution = _attribution + ' | ' + tiles[1]

    mapid = str(uuid.uuid4()).replace('-', '')

    FloatEncoder._formatter = ".{}f".format(float_precision)
    gjdata = json.dumps(renderer.geojson(), cls=FloatEncoder)
    params = {
        'geojson': gjdata,
        'width': fig.get_figwidth()*dpi,
        'height': fig.get_figheight()*dpi,
        'mapid': mapid,
        'tile_url': tiles[0],
        'attribution': attribution,
        'links': [_leaflet_js,_leaflet_css],
        'embed_links': embed_links,
    }
    html = template.render(params)

    return html