code: def _unop_bc(op, idx, ops, keys):
      arg, idx = _opcode_read_arg(idx, ops, keys)
      return ExprNode(op, arg), idx
  
imports: from h2o.utils.compatibility import *
  import dis
  import inspect
  import sys
  from .None import h2o
  from .expr import ExprNode, ASTId
label_desc: Use image node_id 35 for calling a global function with example usage: _unop_bc(op, idx, ops, keys) and returns: ExprNode,  idx