Date format issue

[the_dude]

Hi All,

My apologies in advance if my code is sloppy, just getting back into programming from a LONG break.

I'm having some trouble with datetime.strptime module in my Python3 script - which is running on a Raspberry Pi 3. I keep getting the error 'ValueError: time data '' does not match format '%Y-%m-%d %H:%M:%S.%f''

The trouble code in my script is as follows-

from datetime import datetime, timedelta

if os.path.isfile(log_file): # First check if file exists.
        with open(log_file, 'r') as f:
            date = f.read()
            date_to_datetime = datetime.strptime(date, "%Y-%m-%d %H:%M:%S.%f")

            if datetime.now() < date_to_datetime + timedelta(minutes=1):
                return

    # Update the email log.
    with open(log_file, 'w') as f:
        f.write(str(datetime.now()))

Any and all help would be greatly appreciate. If you have a suggestion on how to fix my issue, please revise my code so it's as straight forward for me to understand as best as possible. Thank you!

- TD