怎么用Python实现中国地图

import numpy as np import matplotlib.pyplot as plt from mpl_toolkits.basemap import Basemapimport cmapsimport shapefilefrom matplotlib.path import Pathfrom matplotlib.patches import PathPatch
ny = grid_z.shape[0]nx = grid_z.shape[1]fig=plt.figure(figsize=(16,9))plt.rc('font',size=15,weight='bold')ax=fig.add_subplot(111)plt.title(u'd_rmse_tmax_012_24h',size=25,weight='bold')mp=Basemap(llcrnrlon=73.,llcrnrlat=15.,urcrnrlon=136.,urcrnrlat=55,projection='cyl')CHN='G:\\DATA\\MAP\\china-shapefiles-master\\'mp.readshapefile(CHN+'china','china',drawbounds=True)sf = shapefile.Reader(CHN+'china_country')for shape_rec in sf.shapeRecords():    if shape_rec.record[8] == 'CHN':        vertices = []        codes = []        pts = shape_rec.shape.points        prt = list(shape_rec.shape.parts) + [len(pts)]        for i in range(len(prt) - 1):            for j in range(prt[i], prt[i+1]):                vertices.append((pts[j][0], pts[j][1]))            codes += [Path.MOVETO]            codes += [Path.LINETO] * (prt[i+1] - prt[i] -2)            codes += [Path.CLOSEPOLY]        clip = Path(vertices, codes)        clip = PathPatch(clip, transform=ax.transData)levels=np.linspace(-0.2,0.2,21)lons, lats = mp.makegrid(nx, ny) # get lat/lons of ny by nx evenly space grid.x, y = mp(lons, lats)cf=mp.contourf(x,y,grid_z,levels=levels,extend='both',cmap=cmaps.MPL_bwr)for contour in cf.collections:        contour.set_clip_path(clip)cbar=mp.colorbar(cf,location='right',format='%8.2f',size=0.3,ticks=np.linspace(-0.2,0.2,11))left, bottom, width, height = 0.15, 0.63, 0.25, 0.25plt.axes([bottom, left, width, height])mf=Basemap(llcrnrlon=107.,llcrnrlat=2.,urcrnrlon=122.,urcrnrlat=22,projection='cyl')CHN='G:\\DATA\\MAP\\china-shapefiles-master\\'mf.readshapefile(CHN+'china','china',drawbounds=True)CHN='G:\\DATA\\MAP\\china-shapefiles-master\\'mf.readshapefile(CHN+'china_nine_dotted_line','china_nine_dotted_line',drawbounds=True,linewidth=1.5)mf.drawcoastlines()plt.show()