human
Write me a Python function to quickly concatenate a lot of lists.
assistant
Here is a Python function to quickly concatenate a lot of lists

import random

def concat_lists(list_of_lists):
    """Concatenate a list of lists."""
    return [item for sublist in list_of_lists for item in sublist]

# Enter the list of lists
list_of_lists = [[1,2,3],[4,5,6],[7,8,9]]

# Calling the function
print((concat_lists(list_of_lists)))

#Example Output
# [1, 2, 3, 4, 5, 6, 7, 8, 9]

#Remember to inspect code for bugs.