http://exercism.io BOB

bob.py

#! /usr/bin/env python

import re


class Bob:
    def hey(self, msg):
        if msg is None or not msg.strip():
            return 'Fine. Be that way!'
        elif msg == msg.upper():
            return 'Woah, chill out!'
        elif re.search(r'\?(?:\s+)?$', msg):
            return 'Sure.'
        else:
            return 'Whatever.'