在python中不同的datetype值之间减去

Question

I have a DataFrame that looks like this:

raw_data = {'Series_Date':['2017-03-10','2017-03-13','2017-03-14','2017-03-15'],'SeriesDate':['2017-03-10','2017-03-13','2017-03-14','2017-03-15']}
import pandas as pd
df = pd.DataFrame(raw_data,columns=['Series_Date','SeriesDate'])
print df

However, on running the following comands:

from pandas.tseries.offsets import BDay
df['SeriesDate'] = pd.to_datetime(df['SeriesDate'])
df['Start_Date'] = df['SeriesDate'] - BDay(10)

I get the following error:

TypeError: ufunc subtract cannot use operands with types dtype('<M8[ns]') and dtype('O')

How can I work around this?

Answer 1

Code works fine for me. So I'm guessing there's some problems in your environment. You can read up a similar answer here: pandas date column subtraction

Would have commented instead of an answer, but I do not have enough rep to do so.