code: def _open(self):
      offset = self.fp.tell()
  
      if not _accept(self.fp.read(6)):
          raise SyntaxError("Not a FITS file")
  
      # FIXME: add more sanity checks here; mandatory header items
      # include SIMPLE, BITPIX, NAXIS, etc.
  
      self.fp.seek(offset)
  
      # make something up
      self.mode = "F"
      self._size = 1, 1
  
      loader = self._load()
      if loader:
          loader.open(self)
  
file_path: catboost/contrib/python/Pillow/py2/PIL/FitsStubImagePlugin.py
imports: from .None import Image, ImageFile
label_desc: Use image node_id 1 for calling the FITSStubImageFile obj's underlying member method code with example usage: obj._open() without return types