code: def post(self):
      file1 = self.request.files["file1"][0]
      zip_file_path = os.path.join(args.data_root, file1["filename"])
      with open(zip_file_path, "wb") as f:
          f.write(file1["body"])
      VizSeqZipFile.unzip(
          args.data_root, file1["filename"], remove_after_unpacking=True
      )
      self.redirect("/", status=303)
  
imports: import os
  import os.path
  import argparse
  from typing import List
  from vizseq._utils.logger import logger
  from vizseq._view import VizSeqWebView, DEFAULT_PAGE_SIZE, DEFAULT_PAGE_NO
  from vizseq._data.zip_file import VizSeqZipFile
  from vizseq._data import get_g_translate, VizSeqGlobalConfigManager
  from vizseq._visualizers import SPAN_HIGHTLIGHT_JS
  from vizseq._utils import VizSeqJson
  from vizseq import __version__
  from tornado import web, ioloop
  from jinja2 import Environment, PackageLoader, select_autoescape
label_desc: Use image node_id 2 for calling the UploadHandler obj's underlying member method code with example usage: obj.post() without return types