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What is the List.copy() method in Python?

Onyejiaku Theophilus Chidalu

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

Overview

The List.copy() method is one of the many list methods in Python. The List.copy() method is simply used to get the copy of a list.

Syntax

List.copy()

Parameters

List.copy() does not take any parameters.

Example

Let’s create a list of even numbers up to 10. We use List.copy() to get a copy of the list we create.

even_numbers = [2, 4, 6, 8, 10]
# now let us have a copy of our specified list in another list
even_numbers2 = even_numbers.copy()
print(even_numbers2)

Explanation

  • Line 1: We create a list of items and call it even_numbers.
  • Line 4: We make a copy of the items of our initial list, which we call even_numbers2.
  • Line 5: We print the new list, even_numbers2, which contains the copied items from the original list, even_numbers .

Note: Whenever you copy the items of a list to a new list, they become entirely independent. That is, any modification done to either of the two lists has nothing to do with the other.

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Onyejiaku Theophilus Chidalu

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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