Method fail

src/mgr/PyModule.h:155–160

* Mark the module as failed, recording the reason in the error * string. */

   * string.
   */
  void fail(const std::string &reason)
  {
    std::lock_guard l(lock);
    failed = true;
    error_string = reason;
  }

  bool is_enabled() const {
    std::lock_guard l(lock);