python strptime format with optional bits
You could use a try/except block:
try:
timestamp = datetime.strptime(date_string, '%Y-%m-%d %H:%M:%S.%f')
except ValueError:
timestamp = datetime.strptime(date_string, '%Y-%m-%d %H:%M:%S')
What about just appending it if it doesn't exist?
if '.' not in date_string:
date_string = date_string + '.0'
timestamp = datetime.strptime(date_string, '%Y-%m-%d %H:%M:%S.%f')