class_docstr: Wrapper for the multipage FI bitmap object.
class_docstr_tok: ["Wrapper","for","the","multipage","FI","bitmap","object","."]
code: def __len__(self):
      with self._fi as lib:
          return lib.FreeImage_GetPageCount(self._bitmap)
  
imports: import os
  import sys
  import ctypes
  import threading
  import logging
  import numpy
  from ..core import get_remote_file, load_lib, Dict, resource_dirs, IS_PYPY, get_platform, InternetNotAllowedError, NeedDownloadError
label_desc: Use image node_id 3 for calling the FIMultipageBitmap obj's underlying member method code with example usage: obj.__len__() and returns: lib