It seems that you're successfully converting the data to datetime objects. What is being shown in the output is the string representation of the date.
The format string you passed to pd.to_datetime is just for parsing the dates. It does not affect their internal data. If you only need strings, you should call .strftime("%H:%M:%S.%f") for each date object in your collection.
I have to convert the object to DateTime. However, it shows a year, month, and day at the front. So how can I display only time?
f1['Time'] = pd.to_datetime(f1['Time'], format = '%H:%M:%S.%f')
f1['Time']
It shows:
0    1900-01-01 01:32:03.897
1    1900-01-01 02:02:34.598
2    1900-01-01 01:34:31.421
What I want is time only, like this:
0    01:32:03.897
1    02:02:34.598
2    01:34:31.421
How do I delete year month and date, display only time on python