如下所示：
date
20170307
20170308
iphone4
2
0
iphone5
2
1
iphone6
0
1
先生成DF数据。
>>> df = pd.DataFrame.from_dict([['ip4','20170307',1],['ip4','20170307',1],['ip5','20170307',1],['ip5','20170307',1],['ip6','20170308',1],['ip5','20170308',1]])
>>> df.columns=['type','date','num']
>>>df
type
