[FIXED] Fuzzy regex matching with python returns empty list

Issue

I have made a clumsy first attempt at fuzzy pattern matching using the re module in python 2.7.

Unfortunately every attempt I make returns an empty list. I simply don't understand the syntax required. I was wondering if someone might tell me why the following code:

import re
m = re.findall('(ATCT){e<=1}', 'ATCGATCGGCATGCAGTGCAGAAGTGACGAT')
print m

returns an empty list?

Solution

Since you intended to use the PyPi regex module, you need to use

>>> import regex
>>> m = regex.findall('(ATCT){e<=1}', 'ATCGATCGGCATGCAGTGCAGAAGTGACGAT')
>>> print(m)
['ATCG', 'ATCG']

Answered By - Wiktor Stribiżew