code: def _read_uint64(f):
      """Read an unsigned 64-bit integer"""
      return np.uint64(struct.unpack(">Q", f.read(8))[0])
  
imports: from __future__ import division, print_function, absolute_import
  import struct
  import numpy
  from numpy.compat import asstr
  import tempfile
  import zlib
  import warnings
label_desc: Use image node_id 11 for calling a global function with example usage: _read_uint64(f) and returns: np