2-3 个性化消息: 将用户的姓名存到一个变量中，并向该用户显示一条消息。显示的消息应非常简单，如“Hello Eric, would you like to learn some Python today?”。
name = "Eric"
print("Hello %s,would you like to learn some Python today?"%name)
'''
结果:
Hello Eric,would you like to learn some Python today?
'''
2-4 调整名字的大小写: 将一个人名存储到一个变量中，再以小写、大写和首字母大写的方式显示这个人名。
name = 'alice'
#显示大写姓名
print(name.upper())
#显示小写姓名
print(name.lower())
#显示首字母小写姓名
print(name.title())
print(name.capitalize())
'''
结果：
ALICE
alice
Alice
Alice
'''
2-5 名言: 找一句你钦佩的名人说的名言，将这个名人的姓名和他的名言打印出来。输出应类似于下面这样(包括引号):Albert Einstein once said, “A person who never made a mistake never tried anything new.”
print("Albert Einstein once said, \"A person who never made a mistake never tried anything new.\"")
'''
结果:
Albert Einstein once said, "A person who never made a mistake never tried anything new."
'''
2-6 名言2: 重复练习2-5，但将名人的姓名存储在变量famous_person 中，再创建要显示的消息，并将其存储在变量message 中，然后打印这条消息。
famous_person = "Albert Einstein"
message = "A person who never made a mistake never tried anything new."
print("%s once said:\"%s\""%(famous_person,message))
'''
结果:
Albert Einstein once said:"A person who never made a mistake never tried anything new."
'''
2-7 剔除人名中的空白: 存储一个人名，并在其开头和末尾都包含一些空白字符。务必至少使用字符组合"\t" 和"\n" 各一次。 打印这个人名，以显示其开头和末尾的空白。然后，分别使用剔除函数lstrip() 、rstrip() 和strip() 对人名进行处理，并将结果打印出来。
name = " alice "
print("\n"+name+"\n")
#剔除左边的空白
print(name.lstrip())
print(name)
print("\t"+name)
#剔除右边的空白
print(name.rstrip()+name)
print(name+name)
#剔除全部空白
print(name.strip()+name.strip()+"\n"+name.strip()+name.strip())
'''
结果:
alice
alice
alice
alice
alice alice
alice alice
alicealice
alicealice
'''
