code: def _read_bytes(f, n):
      """Read the next `n` bytes"""
      return f.read(n)
  
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 3 for calling a global function with example usage: _read_bytes(f, n) and returns: f