在python底圖上繪製點會產生運行時錯誤

Question

我嘗試根據經度和緯度座標從全局地圖上的數據庫（sqlite和底圖模塊）繪製（在python 3.6中）繪製點（機場）。但是，我的代碼將這些點繪製爲與地圖分開的圖形，並顯示一個運行時錯誤：RuntimeError：無法將單個藝術家放在多個圖中。我不知道我做錯了：

from mpl_toolkits.basemap import Basemap 
import matplotlib.pyplot as plt 
import sqlite3 
conn = sqlite3.connect("flights.db") 
cur = conn.cursor() 
cur.execute("select * from airlines limit 5;") 
results = cur.fetchall() 
print(results) 
coords = cur.execute(""" select cast(longitude as float), \ 
        cast(latitude as float) from airports;""" \ 
        ).fetchall() 

m = Basemap(projection = 'merc', llcrnrlat =-80, urcrnrlat = 80, \ 
      llcrnrlon = -180, urcrnrlon = 180, lat_ts = 20, \ 
      resolution = 'c') 

m.drawcoastlines() 
m.drawmapboundary() 

x, y = m([l[0] for l in coords], [l[1] for l in coords]) 
m.scatter(x, y, 1, marker='o', color='red') 

我得到的錯誤是：

RuntimeError: Can not put single artist in more than one figure 

Answer 1

重寫最後行作爲

lons = [l[0] for l in coords] 
lats = [l[1] for l in coords] 
x, y = m(lons, lats) 

m.scatter(x, y, 1, marker='o', color='red') 
plt.show()