类型错误：仅对 DatetimeIndex、TimedeltaIndex 或 PeriodIndex 有效，但得到了“RangeIndex”的实例

Question

Here's what my dataframe looks like:

intrate.head()
Out[83]: 
         Date  UNRATE
0  1954-07-01    0.80
1  1954-08-01    1.22
2  1954-09-01    1.06
3  1954-10-01    0.85
4  1954-11-01    0.83

The years goes all the way to 2019 and I'm trying to resample it to individual years.

I had converted the Date column to Datetime as shown below.

Out[86]: 
Date      datetime64[ns]
UNRATE           float64
dtype: object

The problem is when I'm trying to resample:

intratey = intrate.resample('A').ffill()

I get the error message of:

TypeError: Only valid with DatetimeIndex, TimedeltaIndex or PeriodIndex, but got an instance of 'RangeIndex'

Answer 1

resample requires the index to be datetime format. So if you select your date column to be the index it should work. You can do that by using set_index .