从自定义txt地图确定多边形坐标

Polygon1
10,20
30,40
50,60
10,20
Polygon2
70,80
90,100
110,120
70,80

def read_polygon_from_file(file_path):
    polygons = []
    with open(file_path, 'r') as file:
        lines = file.readlines()
        current_polygon = []
        for line in lines:
            line = line.strip()
            if line.startswith('Polygon'):
                if current_polygon:
                    polygons.append(current_polygon)
                    current_polygon = []
            else:
                x, y = map(float, line.split(','))
                current_polygon.append((x, y))
        if current_polygon:
            polygons.append(current_polygon)
    return polygons

polygons = read_polygon_from_file('map.txt')
for polygon in polygons:
    print(polygon)