Change plotting for charging stations

[dan-kuc]

I made small changes in nodes_charging_park. Can you add them to the mpopf and / or refactoring branch .

def nodes_charging_park(buses, edisgo_obj):
        bus_sizes = {}
        bus_colors = {}
        positions = []
        colors_dict = {"ChargingPark": "r", "else": "black"}
        sizes_dict = {"ChargingPark": 100, "else": 10}
        for bus in edisgo_obj.topology.loads_df.index:
            if 'charging_park' in bus:
                position = str(bus).rsplit('_')[-1]
                positions.append(position)
        for bus in buses:
            bus_colors[bus] = colors_dict['else']
            bus_sizes[bus] = sizes_dict['else']
        for bus in buses:
            for position in positions:
                if position in bus:
                    bus_colors[bus] = colors_dict['ChargingPark']
                    bus_sizes[bus] = sizes_dict['ChargingPark']
        return bus_sizes, bus_colors

[birgits]

I changed it in the refactoring branch!