staticmethod python

1class Calculator:
2
3    # create addNumbers static method
4    @staticmethod
5    def addNumbers(x, y):
6        return x + y
7
8print('Product:', Calculator.addNumbers(15, 110))
9

1import random
2
3class Example:
4  	# A static method doesn't take the self argument and
5    # cannot access class members.
6	@staticmethod
7    def choose(l: list) -> int:
8    	return random.choice(l)
9    
10    def __init__(self, l: list):
11      self.number = self.choose(l)

1class Float:
2    def __init__(self, amount):
3        self.amount = amount
4
5    def __repr__(self):
6        return f'<Float {self.amount:.3f}>'
7
8    @classmethod
9    def from_sum(cls, value_1, value_2):
10        return cls(value_1 + value_2)
11
12
13class Dollar(Float):
14    def __init__(self, amount):
15        super().__init__(amount)
16        self.symbol = '€'
17
18    def __repr__(self):
19        return f'<Euro {self.symbol}{self.amount:.2f}>'
20
21
22print(Dollar.from_sum(1.34653, 2.49573)) 

1class point:
2	def __init__(self, x, y):
3    	self.x = x
4        self.y = y
5        
6    @classmethod
7    def zero(cls):
8    	return cls(0, 0)
9        
10    def print(self):
11    	print(f"x: {self.x}, y: {self.y}")
12        
13p1 = point(1, 2)
14p2 = point().zero()
15print(p1.print())
16print(p2.print())

1# python static method in simple explanation
2class cls:
3    @staticmethod
4    def func():
5        pass
6
7instance1 = cls()
8instance2 = cls()
9instance3 = cls()
10
11print(id(cls.func), cls.func)
12print(id(instance1.func), instance1.func)
13print(id(instance2.func), instance2.func)
14print(id(instance3.func), instance3.func)
15# they are same thing

1class Calculator:
2
3    def addNumbers(x, y):
4        return x + y
5
6# create addNumbers static method
7Calculator.addNumbers = staticmethod(Calculator.addNumbers)
8
9print('Product:', Calculator.addNumbers(15, 110))
10