Python_学习之字符串

# date 2018-01-02

#/usr/bin/python

#-*- coding:UTF-8 -*-

# python之字符串学习

# 字符串语法：

# 变量名='XXXXXXXXXXXXXXXX'

# 返回结果：变量名【头下标:尾下标】---范围值

# 头下标从第0位开始计算，包含下边界

# 尾下标最大范围不包括尾下标

# 加号（+）是字符串连接运算符；星号（*）是重复操作

# 2017-08-24 15:10

str = 'Hello world!'

print str #输出完整的字符串

print str[0] #输出字符串中的第一个字符即H

print str[2:5] #输出字符串中的第三个到第五个字符即llo

print str[2:]#输出字符串中的第三个到结尾即llo world!

print str * 2 #输出完整的字符串2遍即Helloworld！Helloworld！

print str + "TEST" #输出连接的字符串即Hello world！TEST

# 字符串通过单或双引号来表示值，如果不加,数字在Python中将以算术表达式来进行计算

# 如果想表示多行字符串可用3引号来表示"""string""" 或'''string'''

拓展：

#-*-coding:UTF-8-*-

print ('I Love china')

print ('我是中国人')

print "i" * 3

import random

secret = random.randint(1,99)

guess = 0

tries = 0

print "AHOY ！ I'm the Dread Pirate Roberts,and i have secret!"

print "It is a number from 1 to 99. I'll give you 6 tries."

while guess != secret and tries < 6:

guess = input("what's yer guess?")

if guess < secret:

print "Too low,ye scurvy dog!"

elif guess > secret:

print "Too high,landlubber!"

tries = tries + 1

if guess == secret:

print "Avast! ye got it! Found my secret,ye did!"

else:

print "No more guesses! Better luck next time, matey!"

print "The secret number was ",secret