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 = '龙海'
str1 = 'Hello'+' '+ name + ',' + 'would you like to learn some Python today' + '?'
print(str1)  # 输出Hello 龙海,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 = 'dragon sea'
name1 = name.capitalize()
name大 = name.upper()
name小= name.lower()
print(name大)  # 输出DRAGON SEA
print(name1)    # 输出Dragon sea
print(name小)  # 输出dragon sea

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.”

name = 'albert einstein'
new_name = name.title() 
str1 = new_name + ' ' +\
 'once said,"A person who never made a mistake never tried anything new."'
print(str1)    # 输出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'
str2 = famous_person + ' ' +\
 'once said,"A person who never made a mistake never tried anything new."'
print(str2)  # # 输出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

person_name = '\tDr\tagon\nSea'
print(person_name) # 结果为    Dr    agon 
#                          Sea
person_name1 = person_name.strip() # 去两边空格输出结果为Dr    agon
print(person_name1)                 #                    Sea
person_name2 = person_name.lstrip() # 去左边空格输出结果为Dr    agon
print(person_name2)                 #                     Sea
person_name3 = person_name.rstrip() # 去右边空格输出结果为    Dr    agon
print(person_name3)#                                      Sea