1.一个简单的字典

alien_0 ={"color":"green","points" : 5}
print(alien_0["color"])
print(alien_0["points"])

2.添加键-值对

alien_0 ={"color":"green","points" : 5}
print(alien_0["color"])
print(alien_0["points"])

alien_0["x_positon"] = 0
alien_0["y_positon"] = 25
print(alien_0)