python:
1.文本输入带引号,其中 ‘ ," , '"相同,输入文本返回文本,返回文本带‘***’单引号;
2.通过print方法打印文本,返回文本内容,不会返回引号;
3.>>> print("I said,"Don't do it") 该句会报错:SyntaxError: invalid syntax
1.用“/”进行转译
>>>print("I said,\"Don't do it\"")
I said,"Don't do it"
1. """ 三引号 可以输入多行文本 \n 换行(pdf上面说 python 3.0 有 >>>print("hello","world")---hello world)
>>> "hello" "world"
'helloworld'
>>> print(""" w)
ar """)
w)
ar
>>> print("i said \n\"hello world \"")
i said
"hello world "
>>> print("hello","world")
('hello', 'world')
1. %s 是占位符 具体用法 一个%s 表示一个占位符 %10s表示该出应该放入一个10个字符的字符串 one 自由三个字符串前面用空格代替 若为%-5 则是从左开始算
>>> "Join %s%s" %("every","man")
'Join everyman'
>>> "%s %s %10s" %("join","every","one")
疑问:
>>> "\a\b\c\d\e\f\g\h\j\k\l\m\n\o\p"
'\x07\x08\\c\\d\\e\x0c\\g\\h\\j\\k\\l\\m\n\\o\\p'
>>> print( "rock a by baby,\n\ton the tree top,\t\when the windbows\n\t\t\t the crdel")
rock a by baby,
on the tree top, \when the windbows
the crdel
这是什么意思