Python文件正则表达式匹配

Question

我想从python中使用正则表达式提取某些文字，但我无法得到它。我原来的文件看起来像

List/VB 
[ the/DT flights/NNS ] 
from/IN 

，我想输出是

List VB 
the DT 
flights NNS 
from IN 

我写了下面的代码：

import re 

with open("in.txt",'r') as infile, open("out.txt",'w') as outfile: 
    for line in infile: 
     if (re.match(r'(?:[\s)?(\w\\\w)',line)): 
      outfile.write(line) 

Answer 1

与您提供的样本数据：

>>> data = """List/VB 
... [ the/DT flights/NNS ] 
... from/IN""" 

>>> expr = re.compile("(([\w]+)\/([\w]+))", re.M) 
>>> for el in expr.findall(data): 
>>>  print el[1], el[2] 
List VB 
the DT 
flights NNS 
from IN 

Answer 2

import re 

expr = re.compile("(([\w]+)\/([\w]+))", re.M) 
fp = open("file_list.txt",'r') 
lines = fp.read() 
fp.close() 
a = expr.findall(lines) 
for el in expr.findall(lines): 
    print ' '.join(el[1:]) 

输出：

List VB 
the DT 
flights NNS 
from IN