1
message1="I love you ,China!"
print(message1)
message2="wO aI ni zhong guo"
print(message2.title()) ##首字母大写
print(message2.upper()) ##字符串全部大写
print(message2.lower()) ##字符串全部小写
message3=message1.title()+" "+message2.upper() ##字符串拼接
print(message3)

2
print("\tleslie") ##/t制表符
print("language:\nchinese\nenglish\njanpanese") ##换行符
print("language:\n\tchinese\t\nenglish\n\tjanpanese") ##制表符和换行符混用

3
favorite_language = ' python '
favorite_language
favorite_language.rstrip() ##删除结尾空白
favorite_language
favorite_language.lstrip() ##删除开头空白
favorite_language
favorite_language.strip() ##删除字符串开头和结尾空白

4
name1=input("name1:")
print("hello "+name1+",would you like to learn some python today?")

5
name1=input("name1:")
print(name1.lower())
print(name1.upper())
print(name1.title())

6
print('Albert Einstein once said,"A person who never made a mistake never tried anything new."')

7
famous_person = input("famous_person:") ##输入一个变量
print(famous_person.title()+' once said,"A person who never made a mistake never tried anything new."')

8
famous_person = "\txu\nlijian\thaha\nhaha\t"
print(famous_person)
print(famous_person.lstrip()) ##删除开头空格
print(famous_person.rstrip()) ##删除结尾空格
print(famous_person.strip()) ##删除开头和结尾空格
print(famous_person.replace('\n','').replace('\t','')) ##连续替换\n和\t为空