code: def address_of_buffer(space, w_obj):
      if space.config.objspace.usemodules.mmap:
          mmap = space.interp_w(W_MMap, w_obj)
          address = rffi.cast(rffi.SIZE_T, mmap.mmap.data)
          return space.newtuple2(
              space.newint(address), space.newint(mmap.mmap.size)
          )
      else:
          raise oefmt(space.w_TypeError, "cannot get address of buffer")
  
imports: from rpython.rtyper.lltypesystem import rffi
  from pypy.interpreter.error import oefmt
  from pypy.module.mmap.interp_mmap import W_MMap
label_desc: Use image node_id 1 for calling a global function with example usage: address_of_buffer(space, w_obj) and returns: space