# -*- coding: utf-8 -*-

# Author: Huang Xin

# Date: 2016-12-02

# 字符串处理

# Python3 字符串是Unicode编码

name = "huang xin"

# 方法 title()使每个英文单词的首字母大写

print(name.title())

name = "Huang Xin"

# upper()使所有英文字母大写

print(name.upper())

# lower()使所有英文字母小写

print(name.lower())

first_name = "huang"

last_name = "xin"

# 加号(+)用于合并字符串

full_name = first_name + " " + last_name

#print("Hello," + " " + full_name.title() + "!")

message = "Hello, " + full_name.title() + "!"

print(message)

# Python 中使用换行符(\n)&制表符(\t,4个全角的宽度,8byte)

print("Language:\nPython\nC\nShell")

print("Language:\n\tPython\n\tC\n\tShell")

# Python 删除空白的方法

favorite_language = " Python "

# rstrip()剔除字符串结尾的空白

print(favorite_language.rstrip())

# lstrip()剔除字符串开头的空白

print(favorite_language.lstrip())

# strip()删除字符串两端的空白

print(favorite_language.strip())

print("中文测试！")

# r'' 表示 '' 中的字符免手动转义(让输出不换行)

message_0 = r'I like Python, \nabout you?'

message_1 = 'I like Python, \\nabout you?'

print(message_0)

print(message_1)

# 多行字符串: '''多行字符串'''

print('''line1

line2

line3''')

# int() 将非数值型转换为整形

age = int(input("Please enter your age: "))

if age > 18:

print(' You are a adult!')

else:

print(' you are a teenager!')

var = 12

print(var)

var = "insist!"

print(var)

print("\n\n\n")

num1 = 123

num2 = 123.456

print(num1, num2)

str1 = 'Hello, world!'

str2 = 'Hello, \'Adam\''

str3 = r'Hello, "Bart"'

str4 = r'''Hello,

Lisa!

Linus!

Taylor!'''

# 做相同的操作时，数据类型要一致。

print(str(num1) + "\n" + str(num2) + "\n" + str1 + "\n" + str2 + "\n" + str3 + "\n" + str4)