【Moon晨的Python入门笔记】Learn Python The Hard Way（9 & 10 转义笔记 | 练习）

笔记

• Python转义序列

转义字符	功能
\\	反斜杠（ \ ）
\'	单引号（ ' ）
\"	双引号（ " ）
\a	ASCII 响铃符（BEL）
\b	ASCII 退格符（BS）
\f	ASCII 进纸符（FF）
\n	ASCII 换行符（LF）
\N (name)	Unicode 数据库中的字符名，其中 name 是它的名字，仅 Unicode 试用
\r	ASCII 回车符（CR）
\t	ASCII 水平制表符（TAB）
\uxxxx	值为 16 位十六进制值 xxxx 的字符
\Uxxxxxxxx	值为 32 位十六进制值 xxxxxxxx 的字符
\v	ASCII 垂直制表符（VT）
\ooo	值为八进制 ooo 的字符
\xhh	值为十六进制值 hh 的字符

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

练习

• ex9.py（具体语法规则详见：https://blog.youkuaiyun.com/weixin_40204888/article/details/83021196）

days = 'Mon Tue Wed Thu Fri Sat Sun'
# 赋值days以字符串：‘Mon Tue...Sun’
months = "Jan\nFed\nMar\nApr\nMay\nJun\nJul\nAug"
# 赋值months以字符串以星期，并且输出Jan后另取一行，再Fed，再另取一行，再Mar
print('Here are the days:',days)
# 输出字符串“Here...days”，然后输出 变量days（其对应的字符串）
print("Here are the months:",months)
# 输出字符串“Here...months”，然后输出 变量months
print('''There's something going on here.
With the three double-quotes.
We'll be able to type as much as we like.
Even 4 lines if we want, or 5, or 6
''')
# 三引号内可随意折行，且会保持该格式输出。三引号内的 单/双引号都无需转义

'''
输出:
Here are the days: Mon Tue Wed Thu Fri Sat Sun
Here are the months: Jan
Fed
Mar
Apr
May
Jun
Jul
Aug
There's something going on here.
With the three double-quotes.
We'll be able to type as much as we like.
Even 4 lines if we want, or 5, or 6
'''

• ex10.py（主要练习转义符号）

persian_cat = "I'm split\non a line."
# 赋予左边变量右边的字符串。字符串先是正常的“I'm split”，然后换行后，接“on a line."
backslash_cat = "I'm \\ a \\ cat."
# 赋予左边变量右边的字符串。双斜杠最后是输出一个斜杠 \
fat_cat = """
I'll do a list:
\t* Fishies
\t* Catnip\n\t* Grass
"""
# 三双引，保存格式输出，其中\t是制表符，在开头，空8格，再输出文字
print(persian_cat)
print(backslash_cat)
print(fat_cat)

Shmily_means = "\n\tSee?\n\tHow much I love you"
print(f"I mean...{Shmily_means}")

x = "I mean...{}"
print("Long time no see...",x.format(Shmily_means))

'''
输出：
I'm split
on a line.
I'm \ a \ cat.

I'll do a list:
	* Fishies
	* Catnip
	* Grass

I mean...
	See?
	How much I love you
Long time no see... I mean...
	See?
	How much I love you
'''