使用python在txt文件中进行多行搜索

Question

I have txt with patterns like this:

...
72 anything
73 }
74 something {
75 something2
76 something3 withVariableTextHere
77 anything
...

I've tried searching for: "something {\\nsomething2\\nsomething3)" and I do get True result with re.findall, but after I've found the pattern I want to print whole #76 line, because I need info after "something3".

Does anyone have idea how I could do that? And I want to do it multiple times trough the same file, essentially whenever pattern is found I want to print whole third line.

Answer 1

You can use capturing groups in your regex. For example:

s = """anything
}
something {
something2
something3 withVariableTextHere
anything"""

re.findall("something {\nsomething2\nsomething3(.*)", s)

Will yield:

[' withVariableTextHere']

In short, it will return everything that matches the part of the regex in parenthesis, here anything before a new line .