Ques 1 OOPs
What is the output of the following Python Code?
class student:
def __init__(self, roll_no,college):
self.__roll_no=roll_no
self.college=college
student1 = student(18345354332,"CSIT COE")
print(student1.__roll_no)
The '__roll_no' attribute is a private variable because it is prefixed with double underscores (__). Private variables cannot be accessed directly outside the class.
Attempting to access 'student1.__roll_no' raises an AttributeError because Python uses name mangling for private variables.
To access the private variable, you would need to use the mangled name, e.g., 'student1._student__roll_no'.
Ques 2 OOPs
What is the output of the following Python Code?
class student:
def __init__(self, roll_no,college):
self.__roll_no=roll_no
self.college=college
student1 = student(18345354332,"CSIT COE")
student1.branch="Information Technology"
student1.__branch="Information Technology"
print(student1.branch)
The attribute branch is dynamically added to the student1 object with the value "Information Technology". This is a public attribute and can be accessed directly.
Another attribute, __branch, is also dynamically added. However, since it starts with double underscores, it is treated as a private variable (name mangling applies), and it is different from branch.
print(student1.branch) accesses the public branch attribute and outputs "Information Technology".