NameError: name 'main' is not defined - Is it the indentation?

I am new to python and this question has been asked before

1. nameError name is not defined
2. NameError: name '' is not defined
3. NameError name 'Views' is not defined

but i have a different situation, this is my program

class student:    
    def address(self):
        print('address is mumbai')

    def contact(self):
        print('email : foo@yahoo.com')

    def main(self):
        _student=student()
        _student.address()
        _student.contact()    

if __name__ == "__main__":
    main()

i dont know if it is my indentation that is causing problem or it has something to do with the scope of the method

main is a method inside of the class student, so you need to change where main is defined.

class student:    
    def address(self):
        print('address is mumbai')

    def contact(self):
        print('email : foo@yahoo.com')

def main():
    _student=student()
    _student.address()
    _student.contact()