@h.memoize
    def max(self):
        res = self._qexec("max(%s)" % self._name)
        if len(res) > 0:
            self._max = res[0][0]
        return self._max
:returns the maximum of the column
dataset/ETHPy150Open grundprinzip/pyxplorer/pyxplorer/types.py/Column.max