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A list is a data structure in Python that is used to store multiple items in a single variable1. A list can contain items of any data type, such as strings, integers, booleans, or even other lists1. Lists are ordered, changeable, and allow duplicate values1.
To create a list in Python, you can use square brackets [ ] and separate the items with commas. For example:
# Create a list of fruitsfruits = ["apple", "banana", "cherry"]# Print the listprint(fruits)You can access the items in a list by using their index positions. The index starts from 0 for the first item, 1 for the second item, and so on. You can use negative indexes to access the items from the end of the list. For example:
# Access the first itemprint(fruits[0])# Access the last itemprint(fruits[-1])You can also use slicing to get a range of items from a list. The syntax is [start:stop:step], where start is the starting index, stop is the ending index (not included), and step is the increment value. For example:
# Get the items from index 1 to 3 (not including 3)print(fruits[1:3])# Get every second item from the listprint(fruits[::2])You can modify the items in a list by assigning a new value to a specific index. For example:
# Change the second item to "orange"fruits[1] = "orange"# Print the modified listprint(fruits)You can also use various methods to manipulate lists in Python. Some of the common methods are:
append(x): Adds an item x to the end of the list.
extend(iterable): Adds all the items from an iterable (such as another list, tuple, set, etc.) to the end of the list.
insert(i, x): Inserts an item x at a given position i.
remove(x): Removes the first item from the list that has a value equal to x.
pop(i): Removes and returns the item at position i. If no index is specified, it removes and returns the last item in the list.
clear(): Removes all the items from the list.
index(x[, start[, end]]): Returns the index of the first item that has a value equal to x. You can optionally specify a start and end index to limit the search.
count(x): Returns the number of times x appears in the list.
sort(*, key=None, reverse=False): Sorts the items of the list in place. You can optionally specify a key function or a reverse flag to customize the sorting.
reverse(): Reverses the order of the items in the list in place.
copy(): Returns a shallow copy of the list.
Learn moreâś•This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links. Python List (With Examples) - Programiz
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