Add column with number of days between dates in DataFrame pandas

Question

I want to subtract dates in \'A\' from dates in \'B\' and add a new column with the difference.

df
          A        B
one 2014-01-01  2014-02-28 
two 2014-         


        

Answer 1

To remove the 'days' text element, you can also make use of the dt() accessor for series: https://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.dt.html

So,

df[['A','B']] = df[['A','B']].apply(pd.to_datetime) #if conversion required
df['C'] = (df['B'] - df['A']).dt.days

which returns:

             A          B   C
one 2014-01-01 2014-02-28  58
two 2014-02-03 2014-03-01  26