通过python对文件夹中的所有文件进行搜索和替换? [英] Do a search-and-replace across all files in a folder through python?

问题描述

我想学习使用 python 作为命令行脚本的替代品.过去我花了一些时间在 python 上，但已经有一段时间了.这似乎在它的范围之内.

I'd like to learn to use python as a command line scripting replacement. I spent some time with python in the past but it's been a while. This seems to be within the scope of it.

我想对文件夹中的几个文件进行搜索和替换，在所有这些文件中.我想用 python 脚本来做.

I have several files in a folder that I want to do a search-and-replace on, within all of them. I'd like to do it with a python script.

例如，搜索foo"的所有实例并将其替换为foobar".

For example, search and replace all instances of "foo" with "foobar".

推荐答案

欢迎使用 StackOverflow.既然你想自学 (+1)，我就给你一些建议.

Welcome to StackOverflow. Since you want to learn yourself (+1) I'll just give you a few pointers.

查看os.walk() 获取所有文件.

Check out os.walk() to get at all the files.

然后遍历文件中的每一行(for line in currentfile: 在这里派上用场).

Then iterate over each line in the files (for line in currentfile: comes in handy here).

现在你需要知道你是否想要一个愚蠢的"替换(查找/替换每个 foo 即使它在一个单词的中间(比如 foobar - do你想要 foofoobar 结果?)或智能替换.

Now you need to know if you want a "stupid" replace (find/replace each foo even if it's in the middle of a word (say foobar - do you want foofoobar as a result?) or a smart replace.

对于前者，查看str.replace()，对于后者，看re.sub() 并找出 r'\bfoo\b' 的含义.

For the former, look at str.replace(), for the latter, look at re.sub() and figure out what r'\bfoo\b' means.

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