In this tutorial, we will try to understand slots in Python with a simple example.

In Python, we use __dict__ function to store the object attributes. This allows setting new attributes at runtime.
The function __dict__ acts as a dictionary. It doesn’t have a fixed number of attributes stored. One can add attributes to the dictionary after defining them but dynamic adding of attributes to a class is not possible in built-in classes like ‘int’ or ‘list’ etc.

However the above function takes up lesser spaces but also, this leads to the function taking up a lot of space in RAM(if thousands and millions of objects are there).
To solve this limitation, we have __slots__ Spiral knights trinket slot upgrade set. in Python. It provides a static structure not allowing adding attributes after the creation of an instance. __slots__ saved about 9GB RAM.
To define __slots__, one has to define a list with the name ___slots__ which would contain all the attributes to be in use.

Let’s learn slots in Python with a simple piece code.

slots in Python

Python Class Data Member

NOTE: ONE SHOULD DECLARE A PARTICULAR SLOT ONE TIME IN A CLASS. AN ERROR WON’T OCCUR IF THIS IS NOT FOLLOWED BUT OBJECTS WILL TAKE UP MORE SPACE THAN THEY SHOULD

Python Slots Vs Data Classifications

Python Slots Vs Data Classic

Is there a data type in Python similar to structs in C? I like the struct feature myStruct.someName. It's a variation of the slots idea where the class with slots (i.e., the 'struct' type) is generated dynamically. This could of course be fleshed out in various ways, but this is just a proof of concept. Class Reel(Enum): CHERRY = 1 LEMON = 2 ORANGE = 3 PLUM = 4 BELL = 5 BAR = 6 SEVEN = 7 and then use Reel.CHERRY, for example, in the future. This also helps avoid magic numbers. If you don't have Python 3.4 or later you'll have to make your own homegrown Enum class, or use something like.

(36,44)

In the above program, __slots__ is used in the class Right only once declaring a particular slot one time in the class. While the opposite happened in class Left thus declaring three slots at one time. Thus the size of the class Right is 36 which is lesser than 44 (size of class Left).

In the above programs, the line “__slots__= …….” is to define the slots and “def __init__” we define or instantiate the values.

Also lastly, __slots___ was actually created for faster attribute access.

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Slot Machine In Python

Python Slots Vs Data Classes

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