Python 2 countdown prompt

RIPy2prompt.py

#!/usr/bin/env python
# encoding utf-8
"""
    If you set your PYTHONSTARTUP environment variable to point to this file 
    with an absolute path then it will change your python 2 prompt to countdown
    to the End Of Life of Python 2.
    
    Copyright Steve Barnes <GadgetSteve@hotmail.com> 2017
    License: Creative Commons
"""
from __future__ import print_function
import sys
import datetime

EOL = datetime.datetime(2020, 1, 1, 0, 0, 0, 0)
class timetoeol():
    """ Class to give the time to end of life """
    def __init__(self):
        pass
        
    def __str__(self):
        """ Time to the EOL as a string."""
        now = datetime.datetime.now()
        if now < EOL:
            result = "Py2 EOL in %s> " % (EOL-now)
        else:
            result = "RIPy2 %s ago> " % (now - EOL)
        return result
TTEOL = timetoeol()

if sys.version_info.major < 3:  # We don't need to do anything if running 3
    if sys.version_info.minor < 7:
        sys.ps1 = "OBSOLETE PY>"
    else:
        sys.ps1 = TTEOL
        sys.ps2 = '.+. '
    print('Python 2', str(TTEOL)[:-2])