Python中的可选字符串匹配正则表达式

我有一个Python 2.7中的代码，用于从给定的文本中查找航班信息。他们总是来分组（运营商有一个标准的格式，只是填补空白并发送信息）Python中的可选字符串匹配正则表达式

import re 

line = "JetMobile:Your flight 9W448 on 14Jan2015 is expected to leave BLR at 19:00 hrs, reach BOM at 20:42 hrs. Download our Mobile App from http://m.jetairways.com/mobileapps for booking(s), flight status, check-in and more." 

matchObj = re.match(r'JetMobile\:Your flight (.*?) on (.*?) is expected to leave (.*?) at (.*?) hrs, reach (.*?) at (.*?) hrs\. Download our Mobile App from (.*?) for booking\(s\), flight status, check-in and more\.', line, re.M|re.I) 

if matchObj: 
    print "matchObj.group() : ", matchObj.group() 
    print "matchObj.group(1) : ", matchObj.group(1) 
    print "matchObj.group(2) : ", matchObj.group(2) 
    print "matchObj.group(3) : ", matchObj.group(3) 
else: 
    print "No match!!"

但是我想匹配

"JetMobile:Your flight 9W448 on 14Jan2015 is expected to leave BLR at 19:00 hrs, reach BOM at 20:42 hrs. Download our Mobile App from http://m.jetairways.com/mobileapps for booking(s), flight status, check-in and more."

也

如何我要这样做吗？

来源

2015-06-13 Prateek N

那么你的代码有什么问题？ – Kasramvd

如果有“全新”，我无法匹配。所以我想改变正则表达式来匹配 –

只是让它可选！在一个没有捕获的组中（？：所有新的）？ – Kasramvd

制作all new可选?。使用以下内容::

matchObj = re.match(r'JetMobile\:Your flight (.*?) on (.*?) is expected to leave (.*?) at (.*?) hrs, reach (.*?) at (.*?) hrs\. Download our (?:all new)?Mobile App from (.*?) for booking\(s\), flight status, check-in and more\.', line, re.M|re.I)

来源

2015-06-13 07:36:30

Python中的可选字符串匹配正则表达式

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