code: def setup_openblas(plat=get_plat(), ilp64=get_ilp64(), nightly=False):
      """
      Download and setup an openblas library for building. If successful,
      the configuration script will find it automatically.
  
      Returns
      -------
      msg : str
          path to extracted files on success, otherwise indicates what went wrong
          To determine success, do ``os.path.exists(msg)``
      """
      _, tmp = mkstemp()
      if not plat:
          raise ValueError("unknown platform")
      openblas_version = "HEAD" if nightly else OPENBLAS_LONG
      base_loc = NIGHTLY_BASE_LOC if nightly else BASE_LOC
      typ = download_openblas(
          tmp,
          plat,
          ilp64,
          openblas_version=openblas_version,
          base_loc=base_loc,
      )
      if not typ:
          return ""
      osname, arch = plat.split("-")
      if osname == "win":
          if not typ == "zip":
              return (
                  f"expecting to download zipfile on windows, not {typ}"
              )
          return unpack_windows_zip(tmp)
      else:
          if not typ == "tar.gz":
              return "expecting to download tar.gz, not %s" % str(typ)
          return unpack_targz(tmp)
  
imports: import glob
  import os
  import platform
  import sysconfig
  import sys
  import shutil
  import tarfile
  import textwrap
  import time
  import zipfile
  from tempfile import mkstemp, gettempdir
  from urllib.request import urlopen, Request
  from urllib.error import HTTPError
label_desc: Use image node_id 7 for calling a global function with example usage: setup_openblas(plat, ilp64, nightly) and returns: str, unpack_windows_zip, unpack_targz, str, typ, unknown