https://stackoverflow.com/questions/40385782/make-a-union-of-polygons-in-python-geopandas-or-shapely-into-a-single-geometr

show_polygon.py

from shapely.geometry import Polygon
from matplotlib import pyplot as plt
from shapely.ops import cascaded_union
import geopandas as gpd

m = cascaded_union([Polygon(i if i[0] == i[-1] else i[:-2].append(i[0])) for i in [
    [
        [81.300003051757812, 37.588695526123047],
        [75.599998474121094, 37.588695526123047],
        [75.599998474121094, 39.888694763183594],
        [71.900001525878906, 39.888694763183594],
        [66.5, 39.888694763183594],
        [66.5, 43.420764923095703],
        [93.5, 41.001277923583984],
        [93.5, 39.524875640869141],
        [87.199996948242188, 39.524875640869141],
        [87.199996948242188, 39.088695526123047],
        [81.300003051757812, 39.088695526123047],
        [81.300003051757812, 37.588695526123047]
    ],
    [
        [87.201118469238281, 39.524875640869141],
        [93.5, 39.524875640869141],
        [93.5, 41.001277923583984],
        [87.201118461238281, 39.524875640869141]
    ]
]])

boundary = gpd.GeoSeries(cascaded_union(m))
boundary.plot(color='red')
plt.show()