datetime.datetime.now to 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'