Python

Python List Copy

A list is a Python data type that is surrounded in square brackets [] and contains comma-separated items. The list’s values can be of many data kinds. The indexing of a list begins at zero and can be combined and sliced. Because it is sometimes necessary to recreate an object, copy methods are extremely useful. Python’s language provides several options for accomplishing this. The purpose of this artifact is to demonstrate how to use the list’s copy technique. Because the list is extensively utilized, its copy is also required.

Using several built-in operations, list values can be cloned as a new list value. You may need to duplicate the items of a list in some Python procedures. Indeed, a Copy list is a method in Python that is used on lists that include multiple variables/values. The primary functionality of the copy function is to replicate the items of an existing list into a freshly formed empty list. This article is all about copying a list into another list. We have two illustrations that will guide our users whenever they try to copy a list.

Note: Use Spyder IDE on Windows 10 to implement the following examples.

Example 1 : Copy() Method

Copy() is a new technique in Python lists released in Python 3. It duplicates the list into some other list. One thing to keep in mind is that Python 2 does not support it. The copy() function is the most straightforward technique to copy a Python list. We can visualize a condition in which we need to duplicate the list. The equals sign = can be used to create a list duplication. The new list, on the other hand, will be associated with the old one. If you edit the original list, the new list will be updated as well. The item on the new list is similar to the one on the previous list.

The list copy() function generates a copy of the original list. There are no parameters for the copy() function. In this following illustration, we have a list “x” in which we have specified some integers and strings as well. After that, we have created another variable, “new_x”, in which we will copy the contents of the original list. The print statement will be executed after to get the print of the copied list on the screen. The code for the copy() method has been shown in the appended image and in textual form:

X = [‘Hello’, 1, 2, 3]

New_x = x.copy()

Print( ‘Copied List:’ , new_x)

The print of the copied list can be seen in the image displayed below. The output is correct as per our previous program code:

Example 2

This illustration is a bit different from the previous one. Here, we have a list titled “List1” in which integer type values are specified. After that, we have assigned another variable, “new_List1”, to the “List1” variable. Following this pattern, we have used an append function to append a value in both the old and copied strings. The character that is specified here is “a”. The last thing that we have used here is two print statements. They both will display the new list, as well as the old list. The code for the copy() method has been shown in the appended image and textual form:

List1 = [1, 2, 3, 4, 5]

new_List1 = List1

new_List1.append('a')

print('New List:', new_List1)

print('Old List:', List1)

The appended character, along with the new and old list, can be seen as well. The output is correct as per our previous program code.

Conclusion

In this article, we looked at two methods for making a copy of a list in Python. We learned about how to use the copy() function and assign a variable value by using the assignment operator in the very same manner you would when allocating a value to a variable. We provided two different examples regarding the copy method, and the other one has the append method as well. Now, you know the necessary information to build a copy of a list in Python. However, readers, this is not the end of the learning process. I strongly advise everyone to look through the examples above and try to put them into practice.

About the author

Kalsoom Bibi

Hello, I am a freelance writer and usually write for Linux and other technology related content