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class Meta(type):

    def __new__(cls, name, bases, attrs):

        attrs['add'] = lambda self, value: self.append(value)

        return super().__new__(cls, name, bases, attrs)

class CustomList(list, metaclass=Meta):

    pass

What does the CustomList class do in this code?

1. class Laptop:

2.     def __init__(self, ram=8):

3.         self.ram = ram

4.  

5.     def set(self, ram=4):

6.         self.ram += ram

7.         return self.ram

What is the expected output of the following code?

laptop = Laptop()

print(laptop.ram)

laptop.set()

print(laptop.ram)

laptop.set(8)

print(laptop.ram)

1. import copy

2.  

3. original_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

4.  

5. # Method of copying to be determined.

6. copy_list = #copy method goes here#(original_list)

7.  

8. copy_list[1][0] = 99

9.  

10. print(original_list[1][0])

If the #copy method goes here# is replaced with:

1. copy.copy(original_list)

2. copy.deepcopy(original_list)

3. list.copy(original_list)

4. original_list[:]

Which method will not print 99 when print(original_list[1][0]) is executed?

import shelve

 my_shelve = shelve.open('my_shelve.shlv', flag='c')

The flag parameter in the shelve.open() function specifies the mode in which the shelve database should be opened. The default values of the optional flag parameter is set to 'c'. This parameter can accept values like 'r', 'w', 'c' or 'n'. Select the answer that correctly describes these values.