micropython 实现tar 文件解包

import upip_utarfile as tar
import os

def run(src,dest_dir):
  t = tar.TarFile(src)
  if not dest_dir in os.listdir():
    os.mkdir(dest_dir)
  dest_dir=dest_dir+"/"
  prefix=dest_dir
  for i in t:
    i.name=i.name.rstrip('/')
    print(i,i.name)
    i.name=prefix+i.name
    print(i.name)
    if i.type == tar.DIRTYPE:
      try:
        os.mkdir(i.name)
      except OSError as e:
        if e.args[0] != errno.EEXIST and e.args[0] != errno.EISDIR:
          raise e
     
    else:
      f = t.extractfile(i)
      print(i.name)
      copyfileobj(f, open(i.name, "wb+"))

def rmtree(top):
    for path, dirs, files in os.walk(top, False):
        for f in files:
            os.unlink(path + "/" + f)
        os.rmdir(path)

def copyfileobj(src, dest, length=512):
    if hasattr(src, "readinto"):
        buf = bytearray(length)
        while True:
            sz = src.readinto(buf)
            if not sz:
                break
            if sz == length:
                dest.write(buf)
            else:
                b = memoryview(buf)[:sz]
                dest.write(b)
    else:
        while True:
            buf = src.read(length)
            if not buf:
                break
            dest.write(buf)

run("/2.tar","/tt")

run("/2.tar","/tt")  第一参数为解包文件，第二个参数为解包目录