How to combine file names into a list from multiple directories?

[heiner55]

I hope this will help:

#!/usr/bin/python3
import os, pprint

path = "test/"
file_list = {}

for dirname in os.listdir(path):
    print("dir:", dirname)
    for root,dirs,files in os.walk(path + dirname):
        for filename in files:
            print("file:", filename)
            if filename not in file_list:
                file_list[filename]  = []
            file_list[filename].append(os.path.join(root, filename))

print()
pprint.pprint(file_list)

Output:
dir: folder2
file: filea
file: fileb
file: filec
dir: folder3
file: filea
file: fileb
file: filec
dir: folder1
file: filea
file: fileb
file: filec

{'filea': ['test/folder2/filea', 'test/folder3/filea', 'test/folder1/filea'],
 'fileb': ['test/folder2/fileb', 'test/folder3/fileb', 'test/folder1/fileb'],
 'filec': ['test/folder2/filec', 'test/folder3/filec', 'test/folder1/filec']}