def add_environ(self, desc='', val='', addr=''):
        """add an Environment setting"""
        if len(desc) > 0 and 0 > len(val):
            self.environ.append(Environment(desc=desc, val=val, addr=addr))
dataset/ETHPy150Open xraypy/xraylarch/plugins/xrf/mca.py/MCA.add_environ/swapped operands of `>`