Slots in Python is a special mechanism that is used to reduce memory of the objects. In Python, all the objects use a dynamic dictionary for adding an attribute. Slots is a static type method in this no dynamic dictionary are required for allocating attribute.
Syntax
class myClass(object): # defining the slots __slots__ = (par1, par2) def __init__(self, *args, **kwargs): # initializing the values self.par1 = value1 self.par2 = value2
Example 1:
# defining the class. class gfg:
# defining the slots.
__slots__ = ( 'course' , 'price' )
def __init__( self ):
# initializing the values
self .course = 'DSA Self Paced'
self .price = 3999
# create an object of gfg class a = gfg()
# print the slot print (a.__slots__)
# print the slot variable print (a.course, a.price)
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Output
('course', 'price') DSA Self Paced 3999
Example 2:
# defining the class. class gfg:
# defining the slots.
__slots__ = ( 'course' , 'price' )
def __init__( self ):
# initializing the values
self .course = 'oops'
self .price = 5999
# create an object of gfg class a = gfg()
# print the slot print (a.__slots__)
# print the slot variable print (a.course, a.price)
# change the value of the variable a.course = 'System Design'
# print the slot variable print (a.course, a.price)
# change the value of the variable a.price = 9999
# print the slot variable print (a.course, a.price)
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Output
('course', 'price') oops 5999 System Design 5999 System Design 9999
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