import pathlib, itertools, glob, shutil
import random
# root dir
path = 'D://tx//'
# type file & max size (Kb)
ftype = {'.py' : 10, '.txt' : 100, '.xyz' : 5, '.bak' : 1 }
# sub dir name
tdir= {'script', 'text', 'file', 'ddd' }
# combinations of name of file
combin=[1, 2, 3, 4, 5]
for d in tdir:
      comb = itertools.combinations(combin, r=2)
      for a, b in comb:
            pathlib.Path(path, d).mkdir(parents=True, exist_ok=True)
            for ext, size in ftype.items():
                  name = f'{d}{a}{b}{ext}'
                  pathlib.Path(path, d, name).touch(exist_ok=True)
                  full_name=pathlib.Path(path, d, name)
                  print("------",full_name)
                  f=open(full_name,"wt")
                  n=size*int(1024*(random.random()+1))
                  buf=n*ext[1:]
                  f.write(buf)
                  f.close()