如何将变量添加到我的 re.compile 表达式中 [英] How to add a variable into my re.compile expression

问题描述

所以我试图在文件中查找由变量 what2look4 表示的关键字.每当我运行此程序时，它都会返回空白数据.代码如下:

regex2=re.compile(".*(what2look4).*")

我认为问题在于文件被搜索 what2look4 作为字符串本身而不是该变量代表的内容.如有错误请指正，谢谢帮助.

解决方案

你可以这样做...

<预><代码>>>>regex2 = re.compile('.*(%s).*'%what2look4)

或者您可以使用格式:

<预><代码>>>>regex2 = re.compile('.*({}).*'.format(what2look4))

So I am trying to look through a file for a keyword that is represented by the variable what2look4. Whenever I run this program however it keeps returning blank data. The code is as follows:

regex2=re.compile(".*(what2look4).*")

I believe the problem is that the file is being searched for what2look4 as a string in itself instead of what that variable represents. Please correct me if I'm wrong, thanks for the help.

解决方案

You can do it like so...

>>> regex2 = re.compile('.*(%s).*'%what2look4)

Or you can use format:

>>> regex2 = re.compile('.*({}).*'.format(what2look4))

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