从一长串文本中删除所有换行符 [英] Remove all line breaks from a long string of text

问题描述

基本上，我要求用户在控制台中输入一串文本，但该字符串很长并且包含许多换行符.我将如何获取用户的字符串并删除所有换行符以使其成为单行文本.我获取字符串的方法很简单.

string = raw_input("请输入字符串:")

我应该从用户那里获取字符串有什么不同的方式吗?我在 Mac 上运行 Python 2.7.4.

附言显然我是个菜鸟，所以即使解决方案不是最有效的，使用最简单语法的解决方案也会受到赞赏.

解决方案

如何使用 raw_input 输入换行符?但是，一旦你有一个包含一些你想要删除的字符的字符串，只需替换它们.

<预><代码>>>>mystr = raw_input('请输入字符串:')请输入字符串:hello world，我如何输入换行符?>>># 按回车不起作用......>>>密斯特你好世界，我如何输入换行符?">>>mystr.replace(' ', '')'helloworld，如何设置中断线?>>>

在上面的例子中，我替换了所有空格.字符串 '\n' 代表换行符.而 \r 代表回车(如果你在 Windows 上，你可能会得到这些，第二个 replace 会为你处理它们！).

基本上:

# 你可能想用空格 ' ' 来代替 `\n`mystring = mystring.replace('\n', ' ').replace('\r', '')

另请注意，调用变量 string 是个坏主意，因为这会遮蔽模块 string.另一个我会避免但有时会喜欢使用的名称:file.出于同样的原因.

Basically, I'm asking the user to input a string of text into the console, but the string is very long and includes many line breaks. How would I take the user's string and delete all line breaks to make it a single line of text. My method for acquiring the string is very simple.

string = raw_input("Please enter string: ")

Is there a different way I should be grabbing the string from the user? I'm running Python 2.7.4 on a Mac.

P.S. Clearly I'm a noob, so even if a solution isn't the most efficient, the one that uses the most simple syntax would be appreciated.

解决方案

How do you enter line breaks with raw_input? But, once you have a string with some characters in it you want to get rid of, just replace them.

>>> mystr = raw_input('please enter string: ')
please enter string: hello world, how do i enter line breaks?
>>> # pressing enter didn't work...
...
>>> mystr
'hello world, how do i enter line breaks?'
>>> mystr.replace(' ', '')
'helloworld,howdoienterlinebreaks?'
>>>

In the example above, I replaced all spaces. The string '\n' represents newlines. And \r represents carriage returns (if you're on windows, you might be getting these and a second replace will handle them for you!).

basically:

# you probably want to use a space ' ' to replace `\n`
mystring = mystring.replace('\n', ' ').replace('\r', '')

Note also, that it is a bad idea to call your variable string, as this shadows the module string. Another name I'd avoid but would love to use sometimes: file. For the same reason.

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