I am trying to read a log file with the content look like this:

```
127.0.0.1 -  - [17/OCT/2009:00:02:14 0000] GET xxxxxx  xxxx  xxx 
```

I tried the following reg exp and I am getting `ERROR: Unclosed group near index 90`

regex = `(\d+\.\d+\.\d+\.\d+)\s-\s-\s\[(\d+)/(\w{3})/(\d{4}):(\d{2}):(\d{2}):(\d{2})\s(\d{4}\)].*`

Can someone help me?