In this guide, we'll explore Python lists, their features, and the available methods. Lists are one of the most versatile and commonly used data types in Python.
2 hours live session: https://youtube.com/live/NzFLZkVtwMw
A list in Python is an ordered collection of items. Lists can contain a mix of different data types, including numbers, strings, and other lists. Lists are created by placing the items inside square brackets [], separated by commas.
Example:
fruits = ["apple", "banana", "cherry"]You can access individual items in a list using an index. Indices start at 0 for the first item, 1 for the second, and so on.
Example:
print(fruits[0]) # Outputs: appleSlicing allows you to obtain a subset of items from a list. The syntax for slicing is list[start:stop:step].
Example:
print(fruits[1:3]) # Outputs: ['banana', 'cherry']-
Positive Indexing: Starts from the beginning of the list.
Example:
print(fruits[1]) # Outputs: banana
-
Negative Indexing: Starts from the end of the list.
Example:
print(fruits[-1]) # Outputs: cherry
Python lists come with a set of built-in methods:
append(): Adds an element to the end of the list.clear(): Removes all elements from the list.copy(): Returns a copy of the list.count(): Returns the number of elements with the specified value.extend(): Adds elements from another list (or any iterable) to the current list.index(): Returns the index of the first element with the specified value.insert(): Adds an element at a specified position.pop(): Removes the element at a specified position.remove(): Removes the first item with the specified value.reverse(): Reverses the order of the list.sort(): Sorts the list.
For more details and examples on each method, refer to the official Python documentation.