![]() ![]() When a variable is assigned to None, and we check its data type, it returns the class NoneType. We can not associate the None data type with boolean data types either. The None in Python represents a variable or a data type not assigned a value. List And List Operations What Is None Data Type? Lastly, we are printing the length of the list after removal. We can even slice the list and print the sublist using the colon(:). ![]() We are removing the element called Bindhu from the list. The remove function is used to delete a specific element from the list. We are computing the list length we created in the tenth line. The length of the list is computed with the help of len function. Since indexing starts from zero, the string is inserted at the start. In this code, we add the string Akash at the start of the list. The insert function is used to insert an element at a specified position. In the sixth line, we extend the list by adding elements 1,2, and 3. The extend function is used to add multiple elements to the end of the list. The new list is printed in the next line. In the fourth line, we are appending a string called Anand to the list. The append function is used to add an element to the end of the list. The data type of the list we just created is checked in the third line with the help of type constructor. So in the first line of the code, we are creating a list of elements enclosed in square brackets stored in a variable called lis. Print("The length of the list after removal is:\n",len(lis)) Print("Sub-list of the original list is:\n",lis) Print("The list after removal is:\n",lis) Print("The length of the list is:\n",len(lis)) Print("The extended list elements are:\n",lis) Print("The data type of the list is:\n",type(lis)) Print("The elements of the list are:\n",lis) Let us see an example of a list and a few operations. Related: Read this post to know more about immutable data types. At the same time, an immutable data type cannot be changed. A mutable data type can be changed after initialization or declaration. The elements of the list are enclosed within square brackets. While a list can store heterogeneous elements, an array can’t. It is similar to an array in other programming languages with a little difference. It is used to store different elements under a single name. What Is a List?Ī list is the most primal data type of the Python language. In this tutorial, we are going to learn what a list is, the None data type, and how to append None to a list. To elaborate, None is not equal to True or False. None doesn’t associate with boolean data types either. ![]() When a variable is assigned nothing, it returns None. Instead, there is a None data type used to represent a variable that is empty but not by zero. None in Python doesn’t necessarily mean empty. None in Python refers to a situation where no value has been assigned to a variable. ![]()
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