Lists

In Python, Lists allow you to work with mutiple elemnts at once. A list is a collection of objects and allows you to store multiple items in a single variable.

Basic Example:

Code

# Creates a list of names and prints it
names = ["Josh","Eddie","Jonathan, Adolio"]
print("names = ", names)

Output

names = ['Josh','Eddie','Jonathan','Adolio']

Append

Here we'll explore and learn about the Python list append method and provide some examples to further your understanding. The append method allows you to add items to the end of the list.

Code

# Creates a list of groceries
groceries = ['apples','bacon','spinach']

# adds grapes to the end of the list
groceries.append('grapes')

# Prints the grocery list
print("groceries = ", groceries)

Output

groceries = ['apples','bacon','spinach','grapes']

Indexing

Indexing in Python is a way to refer the individual items within an list by it's postion. Positions in lists start with index 0!! You can use square brackets [] to index an element in a specific position. The example below shows how to index different elements in a list.

Code

# Creates a list of animals
animals = ['snake','fish','bear','eagle']

# Prints items at different positions
print("First Item: ", animals[0])
print("Second Item: ", animals[1])
print("Third Item: ", animals[2])
print("Fourth Item: ", animals[3])

Output

snake
fish
bear
eagle

You can also use the index function to find the position of a specific item in a list.

Code

# Creates a list of animals
animals = ['snake','fish','bear','eagle']

# Prints position of 'bear'
print("Position of bear:", animals.index('bear'))

Output

Position of bear: 2