matplotlib Basemap中如何加载shp文件

import numpy as npimport matplotlib.pyplot as pltfrom mpl_toolkits.basemap import Basemap as Basemap# 设置地图的坐标系和坐标显示范围m = Basemap(llcrnrlon=-100.,llcrnrlat=0.,urcrnrlon=-20.,urcrnrlat=57.,            projection='lcc',lat_1=20.,lat_2=40.,lon_0=-60.,            resolution ='l',area_thresh=1000.) fig=plt.figure()# 读取shp文件，注意第二个参数是shp文件在地图里的名称，接下来要用的.shp_info = m.readshapefile('huralll020','hurall',drawbounds=False)print(shp_info)#在地图中找到shp文件，读取shp文件中的属性names = []for shapedict in m.hurall_info:    cat = shapedict['CATEGORY']    name = shapedict['NAME']    if cat in ['H4','H5'] and name not in names:        if name != 'NOT NAMED':  names.append(name)print(names)print(len(names))# 根据属性，在地图上画图for shapedict,shape in zip(m.hurall_info,m.hurall):    name = shapedict['NAME']    cat = shapedict['CATEGORY']    if name in names:        xx,yy = zip(*shape)        # plot为在地图上画图        if cat in ['H4','H5']:             m.plot(xx,yy,linewidth=1.5,color='r')        elif cat in ['H1','H2','H3']:            m.plot(xx,yy,color='k')# 在地图上画其他辅助要素，国界，经纬度线等m.drawcoastlines()m.drawcountries()m.drawmapboundary(fill_color='#99ffff')m.fillcontinents(color='#cc9966',lake_color='#99ffff')m.drawparallels(np.arange(10,70,20),labels=[1,1,0,0])m.drawmeridians(np.arange(-100,0,20),labels=[0,0,0,1])#设置图的标题plt.title('Atlantic Hurricane Tracks (Storms Reaching Category 4, 1851-2004)')plt.show()