Pulling random files out of a folder for sampling

Using numpy.random.choice(array, N) you can select N items at random from an array.

import numpy as np
import os

# list all files in dir
files = [f for f in os.listdir('.') if os.path.isfile(f)]

# select 0.1 of the files randomly 
random_files = np.random.choice(files, int(len(files)*.1))