gistfile1.py

from pprint import pprint
DUPES_FILE = './dupes.txt'

def process_dupes(dupes_file):
    groups = [[]]
    index = 0
    for line in dupes_file:
        if line != '\n':
            path = line.split('  ')[1]
            groups[index].append(path)
        else:
            index += 1
            groups.append([])

    pprint(groups)

with open(DUPES_FILE, 'r') as dupes_file:
    process_dupes(dupes_file)