code: def startfile(fpath, verbose=True):  # nocover
      
      from ubelt import util_cmd
      if verbose:
          print('[ubelt] startfile("{}")'.format(fpath))
      fpath = normpath(fpath)
      if not exists(fpath):
          raise Exception('Cannot start nonexistant file: %r' % fpath)
      if not WIN32:
          import pipes
          fpath = pipes.quote(fpath)
      if LINUX:
          info = util_cmd.cmd(('xdg-open', fpath), detach=True, verbose=verbose)
      elif DARWIN:
          info = util_cmd.cmd(('open', fpath), detach=True, verbose=verbose)
      elif WIN32:
          os.startfile(fpath)
          info = None
      else:
          raise RuntimeError('Unknown Platform')
      if info is not None:
          if not info['proc']:
              raise Exception('startfile failed')
docs: Uses default program defined by the system to open a file.
      This is done via `os.startfile` on windows, `open` on mac, and `xdg-open`
      on linux.
  
      Args:
          fpath (PathLike): a file to open using the program associated with the
              files extension type.
          verbose (int): verbosity
  
      References:
          http://stackoverflow.com/questions/2692873/quote-posix
  
      DisableExample:
          >>> # This test interacts with a GUI frontend, not sure how to test.
          >>> import ubelt as ub
          >>> base = ub.ensure_app_cache_dir('ubelt')
          >>> fpath1 = join(base, 'test_open.txt')
          >>> ub.touch(fpath1)
          >>> proc = ub.startfile(fpath1)