get date and time formatted python

import time
print(time.strftime("%Y-%m-%d_%H-%M-%S"))

# Python program to demonstrate strftime() function
from datetime import datetime as date

# Getting current date and time
now = date.now()
print("Without formatting", now)

# Example 1
s = now.strftime("%A %m %-Y")
print('\nExample 1:', s)

# Example 2
s = now.strftime("%a %-m %y")
print('\nExample 2:', s)

# Example 3
s = now.strftime("%-I %p %S")
print('\nExample 3:', s)

# Example 4
s = now.strftime("%H:%M:%S")
print('\nExample 4:', s)