如何在pandas.groupby函数中为每个组创建数据框？

I have a data frame which has been grouped by 'hour'. I want to use a for loop which loops through each group and creates a data frame for each group. The code I'm using at the moment only creates a data frame for the last group that it iterates through. Any suggestions on how I can get it to work properly?I have a data frame which has been grouped by '