我正在尝试按日期索引数据集，我做错了什么？

Question

I have this data in my DataFrame: enter image description here

I keep getting this error:

Key error 'Date'

When I type this command:

df1['Date']         

I inserted my data set, but Python wont let me see just the dates. I want to turn Daily data into quarterly.

Answer 1

Since you want to make your data to quarterly first you need to convert your date to_datetime .

(Unless you did that when reading the data in read_csv )

df1['DATE'] = pd.to_datetime(df1['DATE])

Then you might want to put your date as index.

Secondly you need to resample your data.

df1.resample("Q") for quarterly

Answer 2

Your column name is in upper case : "DATE".

So you should try this instead:

df1['DATE']