小编use*_*111的帖子

假设我有一个查询：

SELECT ga_channelGrouping, ga_sourceMedium, SUM(ga_sessionDuration)/SUM(ga_sessions) as avg_sessionDuration 

FROM database.table 

group by ga_channelGrouping, ga_sourceMedium

.

如果我有一个看起来像这样的列，我如何选择上周和本周的数据。BigQueryDATE2018-06-19 11:00:00 UTC

我有一个数据框：

ga_deviceCategory_codes ga_channelgrouping_codes    ga_sourceMedium_codes   
        1.0                         6.0                      9.0
        1.0                         6.0                      9.0    

我已使用以下方法将其从分类值转换为分类代码：

data['ga_deviceCategory_codes'] = data['ga_deviceCategory'].astype('category').cat.codes
data['ga_channelgrouping_codes'] = data['ga_channelgrouping'].astype('category').cat.codes
data['ga_sourceMedium_codes'] = data['ga_sourceMedium'].astype('category').cat.codes

现在如何从上面的代码返回原始分类值？