i have a data as
name time
0 acn 1530677359000000000
1 acn 1530677363000000000
2 acn 1530681023000000000
3 acn 1530681053000000000
4 acn 1530681531000000000
5 acn 1530681561000000000
So I would like to change the time column to datetime format.
I tried doing this by executing:
df['time'] = pd.to_datetime(df['time'])
but it gives improper output as :
Out[70]:
0 2078-09-01 09:55:28.826007552
1 2078-10-17 17:02:08.826007552
2 2194-10-10 19:42:08.826007552
3 2195-09-23 01:02:08.826007552
4 2210-11-16 10:48:48.826007552
5 2211-10-29 16:08:48.826007552
I am on python 2.7. kindly take a look.
Vectorised, you can use pd.to_datetime with unit='ns'.
df['datetime'] = pd.to_datetime(df['time'], unit='ns')
print(df)
name time datetime
0 acn 1530677359000000000 2018-07-04 04:09:19
1 acn 1530677363000000000 2018-07-04 04:09:23
2 acn 1530681023000000000 2018-07-04 05:10:23
3 acn 1530681053000000000 2018-07-04 05:10:53
4 acn 1530681531000000000 2018-07-04 05:18:51
5 acn 1530681561000000000 2018-07-04 05:19:21