Python: load a list of file names in a directory

There are two functions, os.listdir and glob.glob, for the purpose.

os.listdir loads all the filenames in the specified directory.

import os
filelist = os.listdir('dirName/')

glob.glob loads all the filenames in the specified directory and we can use wildcard *.

import glob
filelist = glob.glob('dirName/*.png')
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