Protected attributes in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a protected attribute named _value in the class.

Python

class MyClass:
    def __init__(self, val):
        self.[1] = val

Drag options to blanks, or click blank then click option'

A__value

Bvalue

C_value

Dvalue_

Attempts:

3 left

💡 Hint

Common Mistakes

Using no underscore or double underscore for protected attributes.

Protected attributes in Python are named with a single underscore prefix, like _value.

2fill in blank

medium

Complete the code to access the protected attribute _value inside a method of the class.

Python

class MyClass:
    def __init__(self, val):
        self._value = val
    def get_value(self):
        return self.[1]

Drag options to blanks, or click blank then click option'

Avalue

B_value

C__value

Dval

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to access the attribute without the underscore or with double underscores.

Inside the class, you access the protected attribute using its exact name with a single underscore: _value.

3fill in blank

hard

Fix the error in accessing the protected attribute from outside the class.

Python

obj = MyClass(10)
print(obj.[1])

Drag options to blanks, or click blank then click option'

A__value

Bvalue

Cval

D_value

Attempts:

3 left

💡 Hint

Common Mistakes

Using double underscores or no underscore when accessing the attribute.

Protected attributes can be accessed from outside the class using the single underscore name, like obj._value, though it is discouraged.

4fill in blank

hard

Fill both blanks to create a subclass that accesses the protected attribute of its parent class.

Python

class Parent:
    def __init__(self):
        self._value = 5

class Child(Parent):
    def show_value(self):
        return [1].[2]

Drag options to blanks, or click blank then click option'

Aself

BParent

C_value

D__value

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to access the attribute via the class name or using double underscores.

The subclass accesses the protected attribute using self._value.

5fill in blank

hard

Fill all three blanks to define a class with a protected attribute, a method to set it, and a method to get it.

Python

class Data:
    def __init__(self):
        self.[1] = None
    def set_value(self, val):
        self.[2] = val
    def get_value(self):
        return self.[3]

Drag options to blanks, or click blank then click option'

A_data

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names or missing the underscore in some places.

The protected attribute is named _data. The methods set and get this attribute using the same name.