Home Backend Development Python Tutorial python中__slots__用法实例

python中__slots__用法实例

Jun 06, 2016 am 11:18 AM
python usage

本文实例讲述了python中__slots__的用法。分享给大家供大家参考。具体分析如下:

定义__slots__ 后,可以再实例上分配的属性名称将被限制为指定的名称。否则将引发AttributeError,这种限制可以阻止其他人向现有的实例添加新的属性.
 
使用__slots__的类的实例不在使用字典来存储数据。相反,会使用基于数组的更加紧凑的数据结构。

在会创建大量对象的程序中,使用__slots__可以显著减少内存占用和使用时间

class Account(object):
  __slots__ = ('name' ,'balance')
class Test(object):
  def __init__(self ,name):
    self.name = name

Copy after login

希望本文所述对大家的Python程序设计有所帮助。

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