How python uses _ _ slots__ to reduce memory overhead

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Use _ _ slots__ to reduce memory overhead.

Have you ever observed that your Python application consumes a lot of resources, especially memory? This is a technique for using class variables to reduce memory overhead to some extent.

Import sysclass FileSystem (object): def _ init__ (self, files, folders, devices): self.files = files self.folders = folders self.devices = devicesprint (sys.getsizeof (FileSystem)) class FileSystem1 (object): _ _ slots__ = ['files',' folders', 'devices'] def _ init__ (self, files, folders Devices): self.files = files self.folders = folders self.devices = devicesprint (sys.getsizeof (FileSystem1)) # In Python 3.5-> 1016-> 888

Obviously, you can see some savings in memory usage from the results. But when the memory overhead of a class is unnecessarily large, you should use _ _ slots__. Do this only after analyzing the application. Otherwise, you will make the code difficult to change and have no real benefits.

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