Andrey Dugin

from functools import reduce
from pathlib import PurePosixPath

paths = [
    'E:/folder/maps',
    'E:/1/2/3',
    'E:/folder/new',
    'E:/folder/maps/2',
    'D:/papka/echepapka',
    'E:/1/path/dir',
]

tree = {}
for path in map(PurePosixPath, paths):
    reduce(lambda node, part: node.setdefault(part, {}), path.parts, tree)

{'E:': {'folder': {'maps': {'2': {}}, 'new': {}},
  '1': {'2': {'3': {}}, 'path': {'dir': {}}}},
 'D:': {'papka': {'echepapka': {}}}}