{"id":56,"date":"2024-02-14T19:00:01","date_gmt":"2024-02-14T19:00:01","guid":{"rendered":"https:\/\/mrcoder701.com\/?p=56"},"modified":"2024-02-27T21:43:58","modified_gmt":"2024-02-27T16:13:58","slug":"the-walrus-operator-in-python","status":"publish","type":"post","link":"https:\/\/www.mrcoder701.com\/2024\/02\/14\/the-walrus-operator-in-python\/","title":{"rendered":"The Walrus Operator (:=) in Python"},"content":{"rendered":"
In this post we\u2019ll have a look at Python\u2019s walrus operator ( Python is a popular programming language known for its simplicity, flexibility, and ease of use. In version 3.8, Python introduced the Walrus Operator (:=), a new feature that allows you to assign values to variables within an expression. This operator is a relatively new addition to the language, and it has quickly become popular among Python developers. In this blog post, we\u2019ll explore the Walrus Operator in Python and see how it can be used to write more concise and readable code.<\/p> The Walrus Operator is a new syntax introduced in Python 3.8 that allows you to assign values to variables within an expression<\/mark>. Thi<\/mark>s is particularly useful when you want to use the value of a variable multiple times within the same expression<\/mark>.<\/mark> The Walrus Operator is denoted by the := symbol.<\/p> Example 1: Simple Walrus Operator Example<\/strong>:<\/a><\/p> In this example, we use the Walrus Operator to assign the value of x + 5 to y within the if statement. If y is greater than 10, we print \u201cy is greater than 10,\u201d and if it\u2019s less than or equal to 10, we print \u201cy is less than or equal to 10.\u201d<\/p> In this example, we use the Walrus Operator to assign a random integer between 0 and 10 to the variable n and immediately check whether it is equal to 5. The loop will continue until n is equal to 5, at which point the loop will exit and \u201cFound it!\u201d will be printed.<\/p> In this example, we use the Walrus Operator in a list comprehension to create a new list containing only the elements of lst whose squared value is greater than 10. The squared value of each element is assigned to the variable x_squared within the expression.<\/p> In this example, we use the Walrus Operator to assign the length of the list lst to the variable n within the if statement. We then return the average of the list if its length is greater than 0, and 0 otherwise.<\/p> The Walrus Operator is a powerful new feature in Python that allows you to write more concise and readable code. It can be used in a variety of situations, such as in if statements, while loops, list comprehensions, and function return values. However, it\u2019s important to use the Walrus Operator in a way that improves the clarity and readability of your code, rather than just for the sake of using a new feature.<\/p> Thanks for following and claps <\/strong><\/p> Let\u2019s Get in Touch! Follow me on:<\/p> >GitHub: @gajanan0707<\/a><\/p> >Linkedin: Gajanan Rajput<\/a><\/p>:=<\/code>), which can be used to assign and return a value in one expression. This can sometimes lead to shorter and more readable code, or save compute.<\/p>
What is the Walrus Operator (:=)?<\/strong><\/h2>
x = 10\nif (y := x + 5) > 10:\n print(\"y is greater than 10\")\nelse:\n print(\"y is less than or equal to 10\")\n<\/code><\/pre>
Example 2: Walrus Operator in a While Loop<\/h2>
import random\n\nwhile (n := random.randint(0, 10)) != 5:\n print(n)\n\nprint(\"Found it!\")<\/code><\/pre>
Example 3: Walrus Operator in List Comprehension<\/strong><\/h2>
lst = [1, 2, 3, 4, 5]\nnew_lst = [x for x in lst if (x_squared := x**2) > 10]\n\nprint(new_lst)<\/code><\/pre>
Example 4: Walrus Operator with Function Return Value<\/h2>
def calculate_sum(lst):\n if (n := len(lst)) > 0:\n return sum(lst) \/ n\n else:\n return 0\n\nlst = [1, 2, 3, 4, 5]\navg = calculate_sum(lst)\n\nprint(avg)<\/code><\/pre>
Conclusion:<\/h2>