code: def _read_palette(self):
      ret = []
      for i in range(256):
          try:
              b, g, r, a = struct.unpack("<4B", self.fd.read(4))
          except struct.error:
              break
          ret.append((b, g, r, a))
      return ret
  
imports: import struct
  from io import BytesIO
  from .None import Image, ImageFile
label_desc: Use image node_id 2 for calling the _BLPBaseDecoder obj's underlying member method code with example usage: obj._read_palette() and returns: ret