Pandas Vectorized Date Offset Operations with Vector of Differing Offsets

Question

I am trying to do the following but is seems that vectorized operations in this mode are not supported.

import pandas as pd
df=pd.DataFrame([[2017,1,15,1],
          


        

Answer 1

Consider the following approach:

In [94]: df['date'] = pd.to_datetime(df[['year','month','day']])

In [95]: df['date_offset'] = df.apply(lambda x: x['date'] + pd.offsets.MonthEnd(x['month_offset']), axis=1)

In [96]: df
Out[96]:
   year  month  day  month_offset       date date_offset
0  2017      1   15             1 2017-01-15  2017-01-31
1  2017      1   15             2 2017-01-15  2017-02-28
2  2017      1   15             3 2017-01-15  2017-03-31
3  2017      1   15             4 2017-01-15  2017-04-30
4  2017      1   15             5 2017-01-15  2017-05-31
5  2017      1   15             6 2017-01-15  2017-06-30
6  2017      1   15             7 2017-01-15  2017-07-31