what is initialize in python code example

Example: init in python

class Employee():
    no_of_leaves = 8

    def __init__(self, aname, asalary, arole):
        self.name = aname
        self.salary = asalary
        self.role = arole

    def printdetail(self):
        return f"Name is {self.name}. His salary is {self.salary}." \
               f"and his role is {self.role}"