code: def clear_sessions(venv=None):
      
      if "VIRTUAL_ENV" in os.environ:
          ve = os.path.basename(os.environ["VIRTUAL_ENV"])
      else:
          ve = ""
  
      if venv is not None:
          ve = venv
      else:
          ve = prompt("Enter the name of the "
                      "sandbox whose sessions you would like to delete, or "
                      "\"ion\" to clear production sessions:", default=ve)
  
      c = "redis-cli -n {0} KEYS {1}:session:* | sed 's/\"^.*\")//g'"
      keys_command = c.format(REDIS_SESSION_DB, ve)
  
      keys = local(keys_command, capture=True)
      count = 0 if keys.strip() == "" else keys.count("\n") + 1
  
      if count == 0:
          puts("No sessions to destroy.")
          return 0
  
      plural = "s" if count != 1 else ""
  
      if not confirm("Are you sure you want to destroy {} {}" "session{}?".format(count, "production " if ve == "ion" else "", plural)):
          return 0
  
      if count > 0:
          local("{0}| xargs redis-cli -n " "{1} DEL".format(keys_command, REDIS_SESSION_DB))
  
          puts("Destroyed {} session{}.".format(count, plural))
docs: Clear all sessions for all sandboxes or for production.