Pandas add one day to column

Question

I need to add 1 day to each date I want to get the begining date of the following month eg 2014-01-2014 for the 1st item in the dataframe. Tried:

montdist[\         


        

Answer 1

Make it a DatetimeIndex first:

pd.DatetimeIndex(montdist['date']) + pd.DateOffset(1)

Note: I think there is a feature request that this could work with date columns...

In action:

In [11]: df = pd.DataFrame([[1, 2], [3, 4]], columns=['A', 'B'])

In [12]: df['date'] = pd.to_datetime(['21-11-2013', '22-11-2013'])

In [13]: pd.DatetimeIndex(df.date) + pd.DateOffset(1)
Out[13]: 

[2013-11-22 00:00:00, 2013-11-23 00:00:00]
Length: 2, Freq: None, Timezone: None

In [14]: pd.DatetimeIndex(df.date) + pd.offsets.Hour(1)
Out[14]: 

[2013-11-21 01:00:00, 2013-11-22 01:00:00]
Length: 2, Freq: None, Timezone: Non