如何在python中完全匹配两个文本行？

Question

I am working on a log file filter. I want to check whether several input text lines are existing in the log file.Followings are some of my text lines.

Instrument ID = 121212121
Book Definition ID = NORMAL
Trader ID = TRQ01
Order Type = 2
Source ID = <Unset>
Instrument Index = <Unset>
Value = <Unset>
Side = 2
Qualifier = <Unset>
Order Qty = <Unset>
Visible Size = <Unset>
TIF = 0

Following is a part of my log file.

~|A|SMsg:Sequenced Message{
~|A|{
~|A|    Routing Seq = 28545
~|A|    Origin = 1
~|A|    Transaction ID = 28483
~|A|    Sequenced Message = ~|A|        SMsgLite:NEW NEW ORDER
~|A|    {
~|A|            Instrument ID = 121212121
~|A|            Book Definition ID = NORMAL
~|A|            Trader ID = TRQ01
~|A|            Order Type = 2
~|A|            Source ID = <Unset>
~|A|            Instrument Index = <Unset>
~|A|            Value = <Unset>
~|A|            Side = 2
~|A|            Qualifier = <Unset>
~|A|            Order Qty = <Unset>
~|A|            Visible Size = <Unset>
~|A|            TIF = 0
~|A|            Order Sub Type = 3
~|A|            Inactive Time = <Unset>
~|A|            Expiration Date = <Unset>
~|A|            Contingent Value = <Unset>
~|A|            Owner ID = TRQ01
~|A|            Client Order ID = 380-6XAC3Vw6W
~|A|            Transact Time = <Unset>
~|A|            Symbol = <Unset>
~|A|            IsSurveillance = 1
~|A|            Reason = sd
~|A|            Gateway Rejection = <Unset>
~|A|            Order Reject Code = <Unset>

I have two main problems

1. I want to ignore "~|A| " character set when I am matching. That means I want to start matching at the 5th character position of the line.

2. I wan to find the complete matches for above text lines. Here is my lookup function

   Return the boolean True if there a match

    def BooleanLookup(self,infile,regex,start,end): self.infile = infile self.regex = regex self.start = start self.end = end for line in itertools.islice(infile,start,end): line = line.rstrip() if re.match(regex, line): return True break else: return False 

But it returns true even the times that part of string is matches. How do I implement a method to get a completely match.

Answer 1

re.match(regex, line) will return an object if line partially contains regex from left. If you want to use your code, change

if re.match(regex, line):

to

if re.match(regex, line) and re.match(regex,line).span()[1] = len(line):