Beginner Blender Python Tutorial: Python Lists Example 2 (used in tutorial: https://youtu.be/-Gc3UHGoxgc)

example_2.py

# give Python access to Blender's functionality
import bpy

# extend Python functionality to generate random numbers
import random

# create a list of cubes
cube_objects = []

# collect all cubes into a list
for obj in bpy.data.objects:
    if "Cube" in obj.name:
        cube_objects.append(obj)

# loop over the cubes and replace them with monkeys
for cube in cube_objects:
    location = cube.location
    bpy.ops.mesh.primitive_monkey_add(location=location)
    bpy.data.objects.remove(cube)