#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @File  : ex6.py
# @Author: Superhan
# @Date  : 2017/12/20
# @Desc  : created by Superhan
# @license : Copyright(C), Superhan 
# @Contact : chenchaohan@live.com 
# @Software : via PyCharm

x="there are %d types of people." %10
binary ="binary"
do_not ="don't"
y="those who know %s and those who %s ." %(binary,do_not)

print x
print y

print "I said : %r ." %x
print "I alse said : '%s'. " %y

hilarious =False
joke_evaluation = "Isn't that joke so funny ? ! %r"

print joke_evaluation % hilarious

w=" This is the left side of ..."
e = " a string with a right side."

print w+e