Python regex to find string

Question

Can someone please help with making a regex expression to accomplish the following:

Match the string '55' that is not preceded by a '$' and not directly preceded or followed by another numeric digit.

Cant work out the lookarounds. The examples I've found like (?<!) aren't supported by online regex testers like regexpal.

What do you mean by "regex testers"? Are you going to use a "regex tester" in your code or `re`? What have you tried? — Wiktor Stribiżew, Mar 24 '17 at 00:00
If you want to use online regex help tools, make sure to use [one that supports Python regexes](https://regex101.com/), and put it in Python mode. — user2357112, Mar 24 '17 at 00:02

score 0 · Accepted Answer · answered Mar 24 '17 at 00:03

0

I think the regex you are looking for is just (?<!\$)55(?!\d).

BTW. I use regex101.com for online regex testing. It supports (?<!). Python's own library re also supports it.

answered Mar 24 '17 at 00:03

Chuancong Gao

score 0 · Answer 2 · answered Mar 24 '17 at 00:04

0

Try this:

[^\$]55[^\d]

You can try online as mentioned.

answered Mar 24 '17 at 00:04

MoustafaS

2 Answers2