How to use the txaio.interfaces.log_levels.index function in txaio

def _acceptable_level(self, level):
        if self._levels is None:
            target_level = log_levels.index(_log_level)
            self._levels = [
                self.to_tx[lvl]
                for lvl in log_levels
                if log_levels.index(lvl) <= target_level and lvl != "none"
            ]
        return level in self._levels

def _acceptable_level(self, level):
        if self._levels is None:
            target_level = log_levels.index(_log_level)
            self._levels = [
                self.to_tx[lvl]
                for lvl in log_levels
                if log_levels.index(lvl) <= target_level and lvl != "none"
            ]
        return level in self._levels

def _acceptable_level(self, level):
        if self._levels is None:
            target_level = log_levels.index(_log_level)
            self._levels = [
                self.to_tx[lvl]
                for lvl in log_levels
                if log_levels.index(lvl) <= target_level and lvl != "none"
            ]
        return level in self._levels

def _set_log_level(self, level):
        # up to the desired level, we don't do anything, as we're a
        # "real" Twisted new-logger; for methods *after* the desired
        # level, we bind to the no_op method
        desired_index = log_levels.index(level)

        for (idx, name) in enumerate(log_levels):
            if name == 'none':
                continue

            if idx > desired_index:
                current = getattr(self, name, None)
                if not current == _no_op or current is None:
                    setattr(self, name, _no_op)
                if name == 'error':
                    setattr(self, 'failure', _no_op)

            else:
                if getattr(self, name, None) in (_no_op, None):

                    if name == 'trace':

def _set_log_level(self, level):
        # up to the desired level, we don't do anything, as we're a
        # "real" Twisted new-logger; for methods *after* the desired
        # level, we bind to the no_op method
        desired_index = log_levels.index(level)

        for (idx, name) in enumerate(log_levels):
            if name == 'none':
                continue

            if idx > desired_index:
                current = getattr(self, name, None)
                if not current == _no_op or current is None:
                    setattr(self, name, _no_op)
                if name == 'error':
                    setattr(self, 'failure', _no_op)

            else:
                if getattr(self, name, None) in (_no_op, None):

                    if name == 'trace':