Python发射导弹的正确方式

# -*- coding: utf-8 -*-"""Spyder EditorThis is a temporary script file."""from mpl_toolkits.basemap import Basemapimport matplotlib.pyplot as pltimport numpy as np#创建一个fig对象，自定义fig的尺寸fig=plt.figure(figsize=(30,35))#划分fig并且选择一个子图给ax变量ax=fig.add_subplot(1,1,1)#用Basemap（）创建一个地图实例m,m=Basemap(projection='mill',llcrnrlat=20,urcrnrlat=50,llcrnrlon=70,          urcrnrlon=150)#绘制海岸线m.drawcoastlines()#绘制国家，linewidth表示国界线的粗细值m.drawcountries(linewidth=2)#绘制河流m.drawrivers()#设置东京，长崎，广岛，大阪的经纬度坐标#bjlat,bjlon are lat/lon of Beijing 北京的经纬度bjlat=40;bjlon=116#tokyolat,tokyotlon表示东京的经纬度tokyolat,tokyolon=35.42,139.46#广岛坐标Hiroshima_lat,Hiroshima_lon=34.24,132.27#大阪的坐标Osaka_lat,Osaka_lon=34.4,135.3#长崎坐标Nagaski_lat,Nagaski_lon=32.46,129.52#绘制经线和纬线#draw parallelsm.drawparallels(np.arange(10,90,20),labels=[1,1,0,1])#draw meridiansm.drawmeridians(np.arange(-180,180,30),labels=[1,1,0,1])#写一个函数标记地图上城市位置def Draw_position(lon,lat,city,mark,markersize=100):    xpt,ypt=m(lon,lat)    #convert back to lat/lon    lonpt,latpt=m(xpt,ypt,inverse=True)    m.plot(xpt,ypt,mark,markersize)#plot a blue dot there    plt.text(xpt+100000,ypt+100000,city)#绘制北京，东京，长崎，广岛，大阪的坐标    Draw_position(139.16,35.42,"Tokyo",'c*',100)    Draw_position(116,40,"Beijing",'g^',100)    Draw_position(132.27,34.24,"Hiroshima",'c*',100)    Draw_position(135.3,34.4,"Osaka",'c*',100)    Draw_position(Nagaski_lat,Nagaski_lon,"Nagasaki",'c*',100)#绘制两个城市的连接线，这里连接北京和日本的四个城市    m.drawgreatcircle(bjlon,bjlat,tokyolon,tokyolat,linewidth=4,color='b')    m.drawgreatcircle(bjlon,bjlat,Hiroshima_lon,Hiroshima_lat,linewidth=4,color='r')    m.drawgreatcircle(bjlon,bjlat,Osaka_lon,Osaka_lat,linewidth=4,color='y')    m.drawgreatcircle(bjlon,bjlat,Nagaski_lat,Nagaski_lon,linewidth=4,color='r')#etopo()函数绘制的地图更三维和形象    m.etopo()    plt.title("Bomb Japs made by Toby!")    #最终提示    plt.show()