python ``YYYY-MM-DD hh:mm:ss code example

Example 1: yyyy-mm-dd hh:mm:ss.0 python

now = datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")

Example 2: python datetime format yyyy-mm-dd

from datetime import datetime
now = datetime.today().isoformat()
print(now) # '2018-12-05T11:15:55.126382'