Need Help to understand class

[buran]

what is wrong with me ?

:-) There is nothing wrong with you, I hope... There is problem that you cannot add/concatinate str and int.
Please, always post the entire traceback that you get. Take a time to read What to include in a post.
That said it's better to get use of more advanced string formatting features

def myfunc(self):
    print("Hello my name is {}".format(self.name))
    print("My age is {}".format(self.age))

if you are on python 3.6+ you can even use the f-strings

def myfunc(self):
    print(f"Hello my name is {self.name}.")
    print(f"My age is {self.age}.")