How to extract characters between two substrings using reg expression in python?

Question

Eg-My string is :

str1="[00:00:0.047] [TestRunner] [Main] [sleep_assoc] > [Iteration:0][00:00:0.063] [TestRunner] [Main] [sleep_assoc] > [!Iteration:0][00:00:0.063]"

I want to store all characters between [Iteration:0] & [!Iteration:0] to a string variable.

Hello, please provide an example of code you tried, and an example of input and the output you expect to have. — Lorenzo Belli
– Lorenzo Belli, Commented Mar 3, 2017 at 11:33

Kirill Bulygin · Accepted Answer · 2017-03-03 11:18:02Z

1

You can do this using .*?, that matches all characters from [Iteration:0] till it find [!Iteration:0]:

In [1]: import re

In [2]: s = '[00:00:0.047] [TestRunner] [Main] [sleep_assoc] > [Iteration:0][00:00:0.063] [TestRunner] [Main] [sleep_as
   ...: soc] > [!Iteration:0][00:00:0.063]'

In [3]: m = re.search(r'\[Iteration:0](.*?)\[!Iteration:0]', s)

In [4]: res = m.group(1)

In [5]: res
Out[5]: '[00:00:0.063] [TestRunner] [Main] [sleep_assoc] > '

answered Mar 3, 2017 at 11:18

Kirill Bulygin

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Ilja · Accepted Answer · 2017-03-03 11:20:51Z

0

You don't need regex if the strings are so simple.

just do a str1.split('[Iteration:0]')[1].split('[!Iteration:0]')[0]

do you understand the code or shall I explain?

answered Mar 3, 2017 at 11:20

Ilja

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