python_passby_ref_or_value.py

class Student:
    def __init__(self, name) -> None:
        self.Name = name

    def __str__(self) -> str:
        return f"Student({self.Name})"
        
def change_student(s: Student):
    s.Name = "AAA"
    s = Student("New name")
    s.Name = "BBB"
    print(f"function: {s}")
    
def main():
    a = Student("john")
    print(f"main: {a}")
    change_student(a)
    print(f"main: {a}")
    
====== OUTPUT ======
main: Student(john)
function: Student(BBB)
main: Student(AAA)