code: def c(cmd):
      """Run system command, raise SystemExit if it returns an error."""
      print("$", cmd)
      stat = os.system(cmd)
      # stat = 0  # Uncomment this and comment previous to run in debug mode
      if stat:
          raise SystemExit(f"Command {cmd} failed with code: {stat}")
  
imports: import os
  import sys
label_desc: Use image node_id 1 for calling a global function with example usage: c(cmd) without return types