code: def get_gpg_info(
      filename: str,
  ) -> tuple[Optional[str], Optional[str]]:
      """Run the GPG verify command and extract RSA key and email address."""
      asc_filename = filename + ".asc"
      result = subprocess.run(
          ["gpg", "--verify", asc_filename, filename],
          capture_output=True,
      )
      output = result.stderr.decode()
  
      rsa_key = re.search(r"RSA key ([0-9A-F]+)", output)
      email = re.search(r'issuer "([^"]+)"', output)
  
      rsa_key_result = rsa_key.group(1) if rsa_key else None
      email_result = email.group(1) if email else None
  
      # Debugging: print warnings if rsa_key or email is not found
      if rsa_key_result is None:
          print("Warning: No RSA key found in GPG verification output.")
      if email_result is None:
          print(
              "Warning: No email address found in GPG verification output."
          )
  
      return rsa_key_result, email_result
  
file_path: superset/RELEASING/verify_release.py
imports: import re
  import subprocess
  import sys
  from typing import Optional
  import requests
label_desc: Use image node_id 4 for calling a global function with example usage: get_gpg_info(filename) and returns: rsa_key_result,  email_result