del - To delete an object

The del keyword deletes and object, usually something in a list.

Example

Python
planets = ["Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", 
           "Neptune", "Pluto"]
del planets[8]
print(planets)

Output

['Mercury', 'Venus', 'Earth', 'Mars', 'Jupiter', 'Saturn', 'Uranus', 
'Neptune']

Notes: Because everything is an object in Python, you can delete class definitions, variables, even functions.  This is not usually done!