![the used empty with you the used empty with you](https://c1.neweggimages.com/ProductImage/28-786-001-S01.jpg)
In this article, we saw how to create an empty list in Python. Whereas square brackets is just a literal which will always give the same output, it will always return an empty list.
![the used empty with you the used empty with you](https://media.cheggcdn.com/media/cf2/cf2b599c-51e0-462c-8385-e7967a9d33d0/phpoAmkCf.png)
But the main difference between these two ways is that using square brackets is more preferable to using list() function or constructor because using square brackets is faster than using list() function as a list() requires symbol lookup, it might take a list() as an extra function call as it might take it as constructor call and if it is constructor call, then it will check for iterable inside the argument if no arguments then only it creates an empty list. In Python, as we saw, there are two ways to create an empty list, such as using square brackets and using list constructor or list() function. Print("Adding elements using extend function is as follows:")Įxplanation: In the above program, we saw we first created an empty list by using square brackets with the variable as “l” then we have added elements by using append() function, insert() function, which added the element at 0th and 2nd position of the list as mentioned in the program and last we added the elements using extend() function which adds the elements at the end of the created list. Print("Adding elements using insert function at position 0 and 2 is as follows:") Print("Adding elements using append function is as follows:")
![the used empty with you the used empty with you](https://www.msrgear.com/blog/wp-content/uploads/2013/09/DSC52681-1024x680.jpg)
Print("Program for adding elements to the empty list") Let us consider an example below of adding elements to the empty list. There are 3 ways to do this, such as by using append(), insert() and extend() functions in Python. Now let us see how to add elements to the empty list in Python. Then we are printing the type of variable “a” to know if it is a list, and the size of the list also is printed as “0”, which indicates an empty list has been created. Print("Creation of empty list using list constructor:")Įxplanation: In the above program, we can see that we have declared a variable “a”, and we have assigned it to a list() function with no arguments passed to this function. Print("The below program demonstrates the creation of empty list using list function or constructor:") Now let us see an example of creating an empty list using the list() function or constructor. If there are any parameters passed, then it returns the list of those elements passed to the argument. But for creating an empty list, there is no parameter passed then it returns an empty list. Where the parameter is iterable, which can be either list, set, tuples, dictionary, etc. Now let us an example and syntax of how the list constructor can be used for creating an empty list. This is constructor is also used to create an empty list. The list() constructor or built-in function of Python is used to create a list in Python.
![the used empty with you the used empty with you](https://i.ytimg.com/vi/m-aTtSxXZSQ/hqdefault.jpg)
Using a list() function or list() constructor So the output of the above program can be seen in the above screenshot. So we can see that to declare a variable “a” as an empty list, we have assigned it to just an empty square bracket, and we can see what type is variable “a” it results in the type as “list” and we also find the size of the declared variable which is a list, and it results in 0. Print("To declare the empty list using square brackets as follows:")Įxplanation: In the above program, we can see that variable “a” with assigning it with blank square brackets. Print("The below program demonstrates how to declare empty list:") This can be done by just assigning a variable with square brackets. In this method, an empty list can be created using square brackets by placing the sequences of elements inside the square brackets.
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