The * operator repeats a list for the given number of times. We can also use + operator to combine two lists.
# Appending and Extending lists in Python We can add one item to a list using the append() method or add several items using the extend() method. We can use the assignment operator = to change an item or a range of items. Lists are mutable, meaning their elements can be changed unlike string or tuple. For example, my_list returns a list with elements at index 2, 3 and 4, but not 5. Note: When we slice lists, the start index is inclusive but the end index is exclusive. We can access a range of items in a list by using the slicing operator. The index of -1 refers to the last item, -2 to the second last item and so on. Python allows negative indexing for its sequences. TypeError: list indices must be integers or slices, not float # Error! Only integer can be used for indexing Nested lists are accessed using nested indexing. We can't use float or other types, this will result in TypeError. Trying to access indexes other than these will raise an Inde圎rror. So, a list having 5 elements will have an index from 0 to 4. We can use the index operator to access an item in a list. There are various ways in which we can access the elements of a list. # empty listĪ list can also have another list as an item. # list of integersĪ list can have any number of items and they may be of different types (integer, float, string, etc.).
In Python, a list is created by placing elements inside square brackets, separated by commas. For example, # a list of programming languages Python lists are one of the most versatile data types that allow us to work with multiple elements at once.
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