value_counter.py 文件源码

def drop_inconsistent_keys(self, columns, obj):
        """Drop inconsistent keys

        Drop inconsistent keys from a ValueCounts or Histogram object.

        :param list columns: columns key to retrieve desired datatypes
        :param object obj: ValueCounts or Histogram object to drop inconsistent keys from
        """

        # has array been converted first? if so, set correct comparison
        # datatype
        comp_dtype = []
        for col in columns:
            dt = np.dtype(self.var_dtype[col]).type()
            is_converted = isinstance(
                dt, np.number) or isinstance(
                dt, np.datetime64)
            if is_converted:
                comp_dtype.append(np.int64)
            else:
                comp_dtype.append(self.var_dtype[col])
        # keep only keys of types in comp_dtype
        obj.remove_keys_of_inconsistent_type(prefered_key_type=comp_dtype)
        return obj