减去日期以获得熊猫天数

Question

I have 2 columns date_1 ( dtype('O') ) and date_2( dtype(')

 date_1 date_2 2018-06-06 2018-04-01 

when i do subtraction to get days

 df['date_1'] - df['date_2'] 

i get the error TypeError: incompatible type [object] for a datetime/timedelta operation

Answer 1

Need convert columns to datetime s:

df['date_1'] = pd.to_datetime(df['date_1'])
df['date_2'] = pd.to_datetime(df['date_2'])

Or:

df = df.apply(pd.to_datetime)

And then:

df['days'] = (df['date_1'] - df['date_2']).dt.days