u10.py

class Student:
    def __init__(self,name,rollno):
        self.name=name
        self.rollno=rollno
    def __repr__(self):
        return "{},{}".format(self.name,self.rollno)

s=Student("karthi",12)
print (s)#Output:karthi,12

print (dir(Student))
'''
Output:
['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_

'''