More Examples on List copy() Method
Let us see a few examples of the list copy() method.
Example 1: Simple List Copy
In this example, we are creating a List of Python strings and we are using copy() method to copy the list to another variable.
Python3
lis = ['Geeks','for','Geeks']new_list = lis.copy()print('Copied List:', new_list) |
Output
Copied List: ['Geeks', 'for', 'Geeks']
Example 2: Demonstrating the working of List copy()
Here we will create a Python list and then create a shallow copy using the copy() function. Then we will append a value to the copied list to check if copying a list using copy() method affects the original list.
Python3
# Initializing list lis1 = [ 1, 2, 3, 4 ]# Using copy() to create a shallow copylis2 = lis1.copy()# Printing new list print ("The new list created is : " + str(lis2))# Adding new element to new listlis2.append(5)# Printing lists after adding new element# No change in old listprint ("The new list after adding new element : \" + str(lis2))print ("The old list after adding new element to new list : \" + str(lis1)) |
Output
The new list created is : [1, 2, 3, 4] The new list after adding new element : [1, 2, 3, 4, 5] The old list after adding new element to new list : [1, 2, 3, 4]
Note: A shallow copy means if we modify any of the nested list elements, changes are reflected in both lists as they point to the same reference.
Python List copy() Method
The list Copy() method makes a new shallow copy of a list.
Example
Python3
# Using list fruitsfruits = ["mango","apple","strawberry"]# creating a copy shakesshakes = fruits.copy()# printing shakes listprint(shakes) |
Output
['mango', 'apple', 'strawberry']