Get nearest time previous to current time which is divisible by 5

Rohit Lamba :

I have a dataframe with a column which have time data in the format HH:MM:SS. Sample data is shown below for reference:

Time
09:25:03
09:28:40
09:36:12
09:36:14
09:41:10
09:51:00
09:58:48
10:00:11
10:00:17
10:21:44
10:21:53
10:32:58
11:08:59
11:45:55
11:49:14
12:18:54
12:21:22
13:05:47
13:19:37
13:19:57
13:25:22
14:21:10

I want to get the nearest time previous to current time which is divisible by 5. I want the output like below:

Time        Nearest_Time
09:25:03    09:25:00
09:28:40    09:25:00
09:36:12    09:35:00
09:36:14    09:35:00
09:41:10    09:40:00
09:51:00    09:50:00
09:58:48    09:50:00
10:00:11    10:00:00
10:00:17    10:00:00
10:21:44    10:20:00
10:21:53    10:20:00
10:32:58    10:30:00
11:08:59    11:05:00
11:45:55    11:45:00
11:49:14    11:45:00
12:18:54    12:15:00
12:21:22    12:20:00
13:05:47    13:05:00
13:19:37    13:15:00
13:19:57    13:15:00
13:25:22    13:25:00
14:21:10    14:20:00

yatu :

You can use dt.floor setting freq to 5 minutes:

pd.to_datetime(df.Time).dt.floor('5 min')

0    2020-02-14 09:25:00
1    2020-02-14 09:25:00
2    2020-02-14 09:35:00
3    2020-02-14 09:35:00
4    2020-02-14 09:40:00
5    2020-02-14 09:50:00
6    2020-02-14 09:55:00
7    2020-02-14 10:00:00
8    2020-02-14 10:00:00
9    2020-02-14 10:20:00
10   2020-02-14 10:20:00
11   2020-02-14 10:30:00
12   2020-02-14 11:05:00
13   2020-02-14 11:45:00
14   2020-02-14 11:45:00
15   2020-02-14 12:15:00
16   2020-02-14 12:20:00
17   2020-02-14 13:05:00
18   2020-02-14 13:15:00
19   2020-02-14 13:15:00
20   2020-02-14 13:25:00
21   2020-02-14 14:20:00
Name: Time, dtype: datetime64[ns]