code: def set_fallback(self, target):
          
          if isinstance(target, Section):
              target = ':' + target.name
  
          self._set('fallback-config', target)
  
          return self
docs: Sets a fallback configuration for section.
  
          Re-exec uWSGI with the specified config when exit code is 1.
  
          :param str|unicode|Section target: File path or Section to include.