Creating integer timestamp column from date and time columns

Question

I have a dataset with the following columns:

df=pd.read_csv('file.csv')
df
    time        date
0   21:11:07    2022-08-04
1   21:11:12    2022-08-04
2   21:11:27    2022-08-04

How do I get to this:

    time        date          timestamp
0   21:11:07    2022-08-04    123238212
1   21:11:12    2022-08-04    123238217
2   21:11:27    2022-08-04    123238227

Asked By: prof31

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Source

Answer 1

df['datetime'] = pd.to_datetime(df['date'] + ' ' + df['time'])
df['unix_timestamp'] = [i.timestamp() for i in df.datetime]

Convert date and time to datetime. Then get there timestamp.

Answered By: Anonymous89u

Answer 2

I’ll leave the pandas code to you, but you want the strptime function from datetime, this should get you there:

>>> from datetime import datetime
>>> time = '21:11:07'
>>> date = '2022-08-04'
>>> date_time_obj = datetime.strptime(f"{date} {time}", '%Y-%m-%d %H:%M:%S')
>>> print(date_time_obj.timestamp())
2022-08-04 21:11:07

(That pandas specific answer is probably better, but I'll leave this here.)

Answered By: Matt Blaha

Answer 3

I have not used pandas before but what about this?

from datetime import *
df['timestamp'] = int(datetime.fromisoformat(f"{df['date']} {df['time']}").timestamp())

Answered By: Allan Wind

Answer 4

If your column values are dates and times (not strings) then you can do this (I had to subtract 4 hours – 14400 seconds – because of the timezone):

time = [datetime(2022,8,4,21,11,7).time(), datetime(2022,8,4,21,11,7).time()]
date = [datetime(2022,8,4,0,0,0).date(), datetime(2022,8,4,0,0,0).date()]
df = pd.DataFrame({"time":time, "date":date})



df['timestamp']= df.apply(lambda r : int(datetime.combine(r['date'],r['time']).timestamp()-14400),1)
df

Output:

    time        date        timestamp
0   21:11:07    2022-08-04  1659647467
1   21:11:07    2022-08-04  1659647467

Check the timestamp:

pd.to_datetime(1659647467,unit='s')
Timestamp('2022-08-04 21:11:07') ## output

Answered By: Michael S.

Creating integer timestamp column from date and time columns

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