Send Newline / Carriage return with python

Question

With the Serial Monitor I have the Newline option:

How can I send the same using python?

I tried:

30\r\n

30\r

30\n

import serial
ser = serial.Serial('COM3', 115200)
while True:
    numIn = input("enter delay value: ")
    ser.write(numIn.encode('ascii'))