class_docstr: Convert msg spec V4 to V5
class_docstr_tok: ["Convert","msg","spec","V4","to","V5"]
docstr: Handle an execute request.
docstr_tok: ["Handle","an","execute","request","."]
code: def execute_request(self, msg: Dict[str, Any]) -> Dict[str, Any]:
      """Handle an execute request."""
      content = msg["content"]
      user_variables = content.pop("user_variables", [])
      user_expressions = content.setdefault("user_expressions", {})
      for v in user_variables:
          user_expressions[v] = v
      return msg
  
imports: import json
  import re
  from typing import Any, Dict, List, Tuple
  from ._version import protocol_version_info
label_desc: Use image node_id 3 for calling the V4toV5 obj's underlying member method code with example usage: obj.execute_request(msg) and returns: msg