code: def _open(self):
      self._inch = None
  
      # check placable header
      s = self.fp.read(80)
  
      if s[:6] == b"\xd7\xcd\xc6\x9a\x00\x00":
          # placeable windows metafile
  
          # get units per inch
          self._inch = word(s, 14)
  
          # get bounding box
          x0 = short(s, 6)
          y0 = short(s, 8)
          x1 = short(s, 10)
          y1 = short(s, 12)
  
          # normalize size to 72 dots per inch
          self.info["dpi"] = 72
          size = (
              (x1 - x0) * self.info["dpi"] // self._inch,
              (y1 - y0) * self.info["dpi"] // self._inch,
          )
  
          self.info["wmf_bbox"] = x0, y0, x1, y1
  
          # sanity check (standard metafile header)
          if s[22:26] != b"\x01\x00\t\x00":
              msg = "Unsupported WMF file format"
              raise SyntaxError(msg)
  
      elif s[:4] == b"\x01\x00\x00\x00" and s[40:44] == b" EMF":
          # enhanced metafile
  
          # get bounding box
          x0 = _long(s, 8)
          y0 = _long(s, 12)
          x1 = _long(s, 16)
          y1 = _long(s, 20)
  
          # get frame (in 0.01 millimeter units)
          frame = _long(s, 24), _long(s, 28), _long(s, 32), _long(s, 36)
  
          size = x1 - x0, y1 - y0
  
          # calculate dots per inch from bbox and frame
          xdpi = 2540.0 * (x1 - y0) / (frame[2] - frame[0])
          ydpi = 2540.0 * (y1 - y0) / (frame[3] - frame[1])
  
          self.info["wmf_bbox"] = x0, y0, x1, y1
  
          if xdpi == ydpi:
              self.info["dpi"] = xdpi
          else:
              self.info["dpi"] = xdpi, ydpi
  
      else:
          msg = "Unsupported file format"
          raise SyntaxError(msg)
  
      self._mode = "RGB"
      self._size = size
  
      loader = self._load()
      if loader:
          loader.open(self)
  
file_path: catboost/contrib/python/Pillow/py3/PIL/WmfImagePlugin.py
imports: from .None import Image, ImageFile
  from ._binary import i16le
  from ._binary import si16le
  from ._binary import si32le
label_desc: Use image node_id 1 for calling the WmfStubImageFile obj's underlying member method code with example usage: obj._open() without return types