CODEWITHSUNDEEP
pythonregex
Marin
Marin

Reputation: 1121

regex match and replace in python

I have one problem with regexp and match text file, I'm new into python. My file looks like : 

epg_slo3.txt:10346224:        Service_ID: 1 (0x0001)  [=  --> refers to PMT program_number]
epg_slo3.txt:10346236:            Start_time: 0xdce0112500 [= 2013-09-09 11:25:00 (UTC)]
epg_slo3.txt:10346237:            Duration: 0x0001000 [=  00:10:00 (UTC)]
epg_slo3.txt:10346246:                  event_name: "..©port"  -- Charset: ISO/IEC 8859  special table

What i need to to, I need something like this:

Service_ID: 1 (0x0001)  [=  --> refers to PMT program_number]: --> Program 1
Start_time: 0xdce0112500 [= 2013-09-09 11:25:00 (UTC)]: --> Start 2013-09-09 11:25:00 (UTC)
Duration: 0x0001000 [=  00:10:00 (UTC)] --> Duration 00:10:00 (UTC)
event_name: "..©port"  -- Charset: ISO/IEC 8859  --> Category ©port

My code looks like:

#!/usr/bin/python
import codecs
import re

BLOCKSIZE = 1048576

with codecs.open('epg_slo10.txt', "r", "iso-8859-2") as sourceFile:
    with codecs.open('epg_slo.txt', "w", "utf-8") as targetFile:
        while True:
            contents = sourceFile.read(BLOCKSIZE)
            if not contents:
                break
            targetFile.write(contents)


input_file  = open('epg_slo.txt', "r")
output_file = open('epg_slo_kategorije.txt', "w")

for line in input_file:
    line = line.replace("Service_ID:","Program")
    line = line.replace("Start_time:","Start")
    line = line.replace("event_name:","Title")
    output_file.write(line)

Can you help me with this,

thx for reading. BR!

Upvotes: 2

Views: 503

Answers (2)

Barney Szabolcs
Barney Szabolcs

Reputation: 12544

Before line = line.replace in your code, add this line:

line = re.sub(r'^epg_slo3.txt:\d{8}:\s*','', line)

eg.
If

line = "epg_slo3.txt:10346224:        Service_ID: 1 (0x0001)  [=  --> refers to PMT program_number]"

then after calling re.sub:

line = "Service_ID: 1 (0x0001)  [=  --> refers to PMT program_number]"

Upvotes: 1

dirtydexter
dirtydexter

Reputation: 1073

replace the regex given below with empty string ""

/^epg_slo3.txt:\d{8}:\s*/

Upvotes: 1

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