匹配文本后打印行

Question

我正在尝试打印文本文件中匹配文本之后的行。

类似这样的东西：

import re  

afterlines=3
with open(filename, 'r') as f:
    for line in f:
        if line.strip()== ls_losses:
            row  = f.readline(+afterlines) 
            print (row)
            print ("true")

Answer 1

我只会使用一个临时计数器。

import re  
afterlines=3
temporary_lines = ''

with open(filename, 'r') as f:
    for line in f:
        if line.strip() == ls_losses:
            counter = afterlines
            if counter > 0:
                temporary_lines += f.readline()
                counter -= 1
            else:
                print(temporary_lines)
                temporary_lines = '' # Reinitialize to get ready for the next match
                print ("true")