#!/usr/bin/python3
 
import time
import sys
 
 
class Player(object):
  def __init__(self, id, name, status):
    self.id = id
    self.name = name
    self.status = status
 
if __name__ == '__main__':
  player_1 = Player(1, 'bei_bei', '上线')
  print(player_1.__dict__)
   
  print('_' * 100)
  # 动态装配属性
  player_1.money = 10000
  player_1.__dict__['time'] = time.time()
  print(player_1.__dict__)
  print(player_1.money, player_1.time)
   
  print('_' * 100)
  # 打印__dict__占用的内存空间
  print('dict方法占用内存：', sys.getsizeof(player_1.__dict__))
   
  print('_'*100)
  # 动态删除属性
  print(player_1.__dict__)
  del player_1.__dict__['time']
   
  del player_1.money
  print(player_1.__dict__) 

#!/usr/bin/python3
 
 
class Player(object):
  # 通过slots方法指定类的定长属性
  __slots__ = ['id', 'name', 'status']
   
  def __init__(self, id, name, status):
    self.id = id
    self.name = name
    self.status = status
 
 
if __name__ == '__main__':
  player_1 = Player(1, 'bei_bei', '上线')
  print(player_1.id, player_1.name, player_1.status)
   
  # 尝试输出__dict__属性，发现没有，就无法动态的装配类属性，达到省内存的目的
  try:
    print(player_1.__dict__)
  except Exception as e:
    print(e)