![]() What does that mean in practice? Mutability means we can change how a list (or some other object in Python for that matter) is defined without formally redefining the list. Effectively, though, mutable means that the state of a list can be changed after it has been defined. We’ll see examples of what this means in the below sections. We also understood some of the methods that you can use on lists for adding/removing elements from a list, sorting lists, etc.Another property of lists is that they are mutable. So in this article, we understood what Python Lists are. So this code appends the values in myList1and myList2and assigns the resultant list to myList3. The following code demonstrates this: mylist1 = The ‘ +‘ operator acts as the concatenation operator. So this code prints the following output: 4 Concatenating two Python lists The following code demonstrates this: mylist = You can use this function to obtain the length of a list. This returns the length of the object passed in. ![]() So it prints the following output: Obtaining Length of a Python List This code sorts the list in ascending order. ![]() So it prints the following output: Sorting Python Lists So this code prints the following output: In the second code snippet, the index is not specified, so the last value is removed. The first code snippet removes the value at position 1 which is dog. The popmethod removes the element at the specified index or the last element if no index is specified. This code removes the value “ dog” from the list. The removemethod removes the specified element from the List. There are several ways in which you can remove a value from a List. ![]() So it prints the following output: Removing from a Python List This code inserts the value “ horse” at position 2. The following code demonstrates this: mylist= The insertmethod adds a value at the specified position. So it prints the following output: insert This code adds the value “ horse” to the end of the list. The appendmethod adds a value at the end of the list. There are several ways in which you can add a value to a List. So this code prints the following output: Adding to a Python List So this code updates the value at position 2 to “ horse“. You just need to specify the list name, followed by its position in square brackets and assign it a new value. In the backward direction, lists start at position -1 for the last value in the list. In the forward direction,lists start from position 0 for the first element in the list. You can access Python lists both in the forward as well as backward direction. You can access the values in a List via the slice operator. The above code creates a list mylist that has values of type Integer, decimal and String. ![]() The following code demonstrates this: mylist = Īs you can see from the code above, a Python list can contain values of different data types. You can create a list by specifying comma separated values within square brackets. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |