code: def runtime_values(self, **kwargs):
          
  
          # Coerce all values to strings (to be coerced back by configparser
          # later) and defenestrate any None values.
          for k, v in copy.copy(kwargs).items():
              # If the value is None, just get rid of it.
              if v is None:
                  kwargs.pop(k)
                  continue
  
              # Remove these keys from the cache, if they are present.
              self._cache.pop(k, None)
  
              # Coerce values to strings.
              kwargs[k] = six.text_type(v)
  
          # Replace the `self._runtime` INI parser with a new one, using
          # the context manager's kwargs as the "defaults" (there can never
          # be anything other than defaults, but that isn't a problem for our
          # purposes because we're using our own precedence system).
          #
          # Ensure that everything is put back to rights at the end of the
          # context manager call.
          old_runtime_parser = self._runtime
          try:
              self._runtime = Parser(defaults=kwargs)
              self._runtime.add_section('general')
              yield self
          finally:
              # Revert the runtime configparser object.
              self._runtime = old_runtime_parser
  
              # Remove the keys from the cache again, since the settings
              # have been reverted.
              for key in kwargs:
                  self._cache.pop(k, None)
docs: =====API DOCS=====
          Context manager that temporarily override runtime level configurations.
  
          :param kwargs: Keyword arguments specifying runtime configuration settings.
          :type kwargs: arbitrary keyword arguments
          :returns: N/A
  
          :Example:
  
          >>> import tower_cli
          >>> from tower_cli.conf import settings
          >>> with settings.runtime_values(username='user', password='pass'):
          >>>     print(tower_cli.get_resource('credential').list())
  
          =====API DOCS=====