Python regex help :)? [duplicate]

Question

I'm trying to match, last letter in string 'onlin' as any and then replace it if it matches with word offline. No luck. Please give advice, cheers.

import mitmproxy
import re

def response(flow):
    old = b'Onlin\w{1}'
    new = b'Offline'
    flow.response.content = flow.response.content.replace(old, new)

Does it work if you remove that ’ character in Onlin\w{1}’? — Aran-Fey
– Aran-Fey, Commented May 26, 2018 at 13:13
It's not clear what you're asking. Can you explain what the expected output is? — rst-2cv
– rst-2cv, Commented May 26, 2018 at 13:16
In flow.response.content.replace value of variable 'old' is replace by value of the variable 'new'. Im trying to use regex to match value of variable old with the last character as wildcard. But it doesn't work. Basically 'onlin' + [a-z, 0-9] — Matas Petkevičius
– Matas Petkevičius, Commented May 26, 2018 at 13:20

Mišo · Accepted Answer · 2018-05-26 13:30:48Z

5

I guess you are using the wrong function for replacement. Try re.sub.

def response(flow):
    old = b'Onlin\w'
    new = b'Offline'
    # https://docs.python.org/3/library/re.html#re.sub
    flow.response.content = re.sub(old, new, flow.response.content)

edited May 26, 2018 at 13:30

answered May 26, 2018 at 13:19

Mišo

2,6241 gold badge27 silver badges28 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Matas Petkevičius Over a year ago

Works very well, cheers, I'm quite new to this

Peter · Accepted Answer · 2018-05-26 13:22:13Z

2

str.replace() does not recognize regular expressions.

To perform a substitution using a regular expression, use re.sub().

The pattern Onlin. matches any string that starts with Onlin and ends with any character.

import re

old = re.compile('Onlin.')

def response(flow):
    new = 'Offline'
    flow.response.content = old.sub(new, flow.response.content)

Example:

>>> old = re.compile("Onlin.")
>>> old.sub(new, "Onlin Onlina Online")
'offlineoffline offline'

answered May 26, 2018 at 13:22

Peter

6787 silver badges12 bronze badges

1 Comment

Matas Petkevičius Over a year ago

This did not work, but thank You for your time.

Collectives™ on Stack Overflow

Python regex help :)? [duplicate]

2 Answers 2

1 Comment

1 Comment

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Linked

Related