class_docstr: ByteCodeVisitor
docstr: consumer calls this instruction before every instruction.
docstr_tok: ["consumer","calls","this","instruction","before","every","instruction","."]
code: def instruction_pre(self, instr):
      """
      consumer calls this instruction before every instruction.
      """
  
file_path: turicreate/src/python/turicreate/meta/bytecodetools/bytecode_consumer.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from .disassembler_ import disassembler
label_desc: Use image node_id 3 for calling the ByteCodeConsumer obj's underlying member method code with example usage: obj.instruction_pre(instr) without return types