正則表達式的Python解析文件

Question

#!/usr/bin/env python 
# -*- coding: utf-8 -*- 
#fixed the import, just red PEP 8 
import re 
################################################### 
def extract(data): 
    ms = re.match(r'(\S+).*mid:(\d+)' , data) # heure & mid 
    k = re.findall(r"/(\S+)", data) # source & destination 
    exp = result = re.findall(r'NVS:([\w\.]+)',data) # type S & D 
    # if the table length is 1 it means that the origin is unknown 
    if len(k)==1: 
     return {'Heure':ms.group(1), 'mid':ms.group(2),"Origine":"Unknown","Destination":k[0],"Type S":exp[0],"Type D":exp[1]} 
    # if the table length it means that there's a a source and a destination 
    if len(k)==2: 
     return {'Heure':ms.group(1), 'mid':ms.group(2),"Origine":k[0],"Destination":k[1],"Type S":exp[0],"Type D":exp[1]} 

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很好的問題是，當我有行一樣，那裏的[NVS:FAXG3.1.0/+44614215421]返回None，有沒有辦法讓被停止在第二NVS:使其stopps一樣，如果我們有像data2

data = "13:16:16.146 mta   Messages  I CC Doc O:NVS:SMTP/me@test.no R:NVS:SMTP.0/server@test.de [NVS:FAXG3.1.0/+44614215421] mid:41414" 
print extract(data) 

一行它返回

>>>None 

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data2 = "13:16:16.146 mta   Messages  I CC Doc O:NVS:SMTP/me@test.no R:NVS:SMTP.0/server@test.de mid:41414" 
print extract(data2) 

它返回

---

>>> {'Destination': 'server@test.de', 'mid': '41414', 'Type S': 'SMTP', 'Origine': 'me@test.no', 'Type D': 'SMTP.0', 'Heure': '13:16:16.146'} 

Answer 1

骯髒的黑客

只需更換

if len(k)==2: 

到

if len(k)>1: 

，因爲它發現第二個字符串中有多於2個匹配項