python3 使用静态属性节约对象实例的内存开销

# 如何减少大量实例占用内存的开销
import sys

class Player:
def __init__(self, uid, name, status=0, level=1):
self.uid = uid
self.name = name
self.stat = status
self.level = level

class Player2:
__slots__ = ['uid', 'name', 'stat', 'level']  # 用来描述实例的属性

def __init__(self, uid, name, status=0, level=1):
self.uid = uid
self.name = name
self.stat = status
self.level = level

if __name__ == '__main__':
p1 = Player('1010', 'Jim')
p2 = Player2('1010', 'Jim')
p1.x = 100  # Play1可以动态增加属性
# p2.x = 100 出现错误

print(sys.getsizeof(p1.__dict__))  # 用于动态绑定属性的内存开销
print(set(dir(p1)))
print(set(dir(p2)))
print(set(dir(p1)) - set(dir(p2)))