Why Person() takes no arguments

[dianefly]

Hi, can anyone tell me why my code below does not work, with the TypeError: Person() takes no arguments? Thanks a lot in advance!

class Person:
    def _int_(self, name, age):
        self.name = name
        self.age = age
        
    def detail(self):
        print (self.name)
        print (self.age)
        
obj1 = Person("santos", 18)
obj1.detail()