用python的eval函数自定义行情指标公式

先看效果

实现步骤

在前端配置规则和公式，不同的结果可以自定义背景颜色和字体颜色。

    def _compute_rule(self, localdict):
        """
        :param localdict: dictionary containing the current computation environment
        :return: returns a tuple (amount, qty, rate)
        :rtype: (float, float, float)
        """
        self.ensure_one()
        localdict['localdict'] = localdict
        try:
            safe_eval(self.rule_condition or 0.0, localdict, mode='exec', nocopy=True)
            return float(localdict['result']), localdict.get('result_qty', 1.0), localdict.get('result_rate', 100.0)
        except Exception as e:
            raise self._raise_error(localdict, _("Wrong python code defined for:"), e)

计算结果