python 入门 1 字符串

1.修改字符串的大小写

   title   首字母为大写

name = "abc love python"
print(name.title())

运行结果如下：

 

    upper     大写

name2 = "def love python"
print(name2.upper())

运行结果如下：

 

lower  小写

name3 = "GHI LOVE PYTHON"
print(name3.lower())

运行结果如下：

 

 2.合并(并接)字符串

 

# 拼接
first_name = "abc"
last_name = "python"
full_name = first_name + "" + last_name
print("Hello," + full_name.title() + "!")

运行结果如下：

 

把拼接的内容放到一个变量中：

# 拼接2
first_name = "abc"
last_name = "python"
full_name = first_name + "" + last_name
message = "Hello," + full_name.title() + "!"
print(message)

运行结果如下：

 

 

 

3.制表符和换行符

在编程中，可以使用空白来组织输出，使得更容易读。

# \t 空格
print("这是一个简单的\tpython")

运行结果如下：

 

 

 

 

# \n 换行
print("这是\n一个\n简单的\npython")

运行结果如下：

练习题：

# 练习1，个性化消息：将用户的姓名存到一个变量中，并向用户显示一条信息。
name = "Remick"
print("Hello,"+ name + "!would you like to learn some Python today?")

运行结果如下：

 

 

练习题2：

# 练习2，调整人名大小写，将一个人的名存到一个变量中，再以大，小，首字母大写的方式显示
name = "remick"
message = "Hello,"+ name.title() + "\nwould you like to learn some Python today?"
message1 = "Hello,"+ name.upper() + "\nwould you like to learn some Python today?"
message2 = "Hello,"+ name.lower() + "\nwould you like to learn some Python today?"
print(message)
print(message1)
print(message2)

运行结果如下：

 

 

练习题3：

# 练习3,将名人的姓名和名言打印出来，输出必须带引号。
name = 'albert eubstein once said, "A person who never made a mistake never tried anything new."'
print(name.title())

运行结果如下：

 

 

练习题4：

# 练习4，将名人的名字存在famous_person变量，再显示消息。并将所有信息存在message中。
famous_person = "albert eubstein once said,"
sentence = '\t"A person who never made a mistake never tried anything new."'
message = famous_person.title() + sentence.title()
print(message)

运行结果：