Python | How to copy a nested list
In the previous article, we have seen how to clone or Copy a list, now let’s see how to copy a nested list in Python.
Method #1: Using Iteration
# Python program to copy a nested list # List initialization Input_list = [[0, 1, 2], [3, 4, 5], ] Output = [] # Using iteration to assign values for x in range(len(Input_list)): temp = [] for elem in Input_list[x]: temp.append(elem) Output.append(temp) # Printing Output print("Initial list is:") print(Input_list) print("New assigned list is") print(Output) |
chevron_right
filter_none
Output:
Initial list is: [[0, 1, 2], [3, 4, 5]] New assigned list is [[0, 1, 2], [3, 4, 5]]
Method #2: Using deepcopy
# Python program to copy a nested list import copy # List initialization Input = [[1, 0, 1], [1, 0, 1]] # using deepcopy Output = copy.deepcopy(Input) # Printing print("Initial list is:") print(Input) print("New assigned list is") print(Output) |
chevron_right
filter_none
Output:
Initial list is: [[1, 0, 1], [1, 0, 1]] New assigned list is [[1, 0, 1], [1, 0, 1]]
Method #3: Using list comprehension and slicing
# Python program to copy a nested list # List initialization Input_list = [[0,1,2], [3,4,5], [0, 1, 8]] # comprehensive method out_list = [ele[:] for ele in Input_list] # Printing Output print("Initial list is:") print(Input_list) print("New assigned list is") print(out_list) |
chevron_right
filter_none
Output:
Initial list is: [[0, 1, 2], [3, 4, 5], [0, 1, 8]] New assigned list is [[0, 1, 2], [3, 4, 5], [0, 1, 8]]
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.
