python 我想用日期时间设置索引数据帧

Question

poorList = [datetime.date(2016, 5, 2), 
            datetime.date(2016, 8, 26), 
            datetime.date(2016, 6, 9), 
            datetime.date(2016, 3, 4)]

dateForm.set_index(poorList)

然后是错误:

File "pandas\index.pyx", line 137, in pandas.index.IndexEngine.get_loc (pandas\index.c:4066) File "pandas\index.pyx", line 159, in pandas.index.IndexEngine.get_loc (pandas\index.c:3930) File "pandas\hashtable.pyx", line 675, in pandas.hashtable.PyObjectHashTable.get_item (pandas\hashtable.c:12408) File "pandas\hashtable.pyx", line 683, in pandas.hashtable.PyObjectHashTable.get_item (pandas\hashtable.c:12359) KeyError: datetime.date(2016, 5, 2)

请告诉我怎么做？

Answer 1

DataFrame.set_index() 需要一个列名或列列表作为参数，所以你应该这样做:

dateForm['date'] = poorList
dateForm.set_index('date', inplace=True)