CODEWITHSUNDEEP
pythonregex
Bala
Bala

Reputation: 381

Regex query on not operator

I have a mixed pattern of characters, numbers and hex characters like the below one,

Using regex, i want to find out only those which are not hex patterns like asdasd, a12v. 123123

E.x : not(\[xX]\d{2})

final End Goal is to convert everything to hex format. 

\x20\x20\x20\x61\x73\x64\x61\x73\x64\x20\x20\x20\x61\x73\x64\x20\x61\x31\x32\x76\x20\x31\x32\x33\x31\x32\x33\x20\x20

How to do this ?

Thanks.

Upvotes: 0

Views: 34

Answers (1)

Spikes
Spikes

Reputation: 1066

You could probably do this with a regex, but it'd likely be quite error prone, as you'd need to have your regex account for all the other escaping possibilities (octal, for example), which turns into rather a mess. :)

Instead, try using str.decode first to un-escape the data:

s = '\\x20\\x20\\x20asdasd\\x20\\x20\\x20asd\\x20a12v\\x20123123\\x20\\x20'
s = s.decode('string-escape')
s = ''.join('\\x%2x' % ord(c) for c in s)

For the last step, there's likely a faster way. but I just threw that together as an example.

Upvotes: 2

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