czyli propozycja jest zeby zmienic:

```py
    result = [(calendar.day_abbr[weekday],
               utils.mean(intervals['start']), utils.mean(intervals['end']))
              for weekday, intervals in weekdays.iteritems()]
```

na 

```py
 result = [
        (
             calendar.day_abbr[weekday], utils.mean(intervals['start']),
             utils.mean(intervals['end']
        )
       for weekday, intervals in weekdays.iteritems()
]
```

tak ?