Question

Differentiate between Aliasing and Cloning in lists by taking suitable examples. Write a

Write a Python program to find the highest 4 values in a dictionary​

Answer 1

Answer:

Explanation:

As assignments are concerned, there is a difference between two types of data: .Containers (and other complex data): Images, lists, sets and dictionaries When you make an assignment for simple data types, their value is copied to the In this example, since names[0] is also a list, the variable name becomes an alias ...

Answer 2

Aliasing and cloning are two different ways of creating copies of lists in Python.

Aliasing:

• Aliasing means creating a new reference to an existing list.
• In other words, two or more variables pointing to the same list object in memory.
• When changes are made to one variable, it also affects the other variables pointing to the same list.

Example:

list1 = [1, 2, 3]

list2 = list1 # Aliasing

list1[0] = 0

print(list2) # Output: [0, 2, 3]

Cloning:

• Cloning means creating a new list with the same elements as an existing list.
• This can be done using slicing, the copy() method, or the list() constructor.
• When changes are made to the cloned list, it does not affect the original list.

Example:

list1 = [1, 2, 3]

list2 = list1[:] # Cloning using slicing

list1[0] = 0

print(list2) # Output: [1, 2, 3]

Python program to find the highest 4 values in a dictionary:

def top_values(dictionary):

return sorted(dictionary.values(), reverse=True)[:4]

# Example dictionary

d = {'a': 10, 'b': 5, 'c': 20, 'd': 15, 'e': 25}

print(top_values(d)) # Output: [25, 20, 15, 10]

Explanation:

• The top_values() function takes a dictionary as input.
• It extracts the values of the dictionary using the values() method and converts them into a list.
• The sorted() function sorts the list in descending order.
• The [:4] slice extracts the top 4 values from the sorted list.
• The function returns the top 4 values.
• In the example, the function is called with the dictionary d and the output is the top 4 values in descending order, [25, 20, 15, 10].

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