Python Coding challenge - Day 136 | What is the output of the following Python Code?

 

The code creates a list data with elements [1, 2, 3, 4] and then creates a copy of this list called backup_data using the copy() method. After that, it modifies the fourth element of the original data list by setting it to 7. Finally, it prints the backup_data list.

Let's analyze the code step by step:

data = [1, 2, 3, 4]: Initializes a list named data with elements [1, 2, 3, 4].

backup_data = data.copy(): Creates a shallow copy of the data list and assigns it to backup_data. Both lists will initially contain the same elements.

data[3] = 7: Modifies the fourth element of the data list, changing it from 4 to 7.

print(backup_data): Prints the backup_data list. Since it's a copy made before the modification, it will not reflect the change made to the data list.

So, when you run this code, the output will be:

[1, 2, 3, 4]

This is because the modification of the data list does not affect the backup_data list, as it was created as a separate copy.