statistics(group_by: str, cumulative: bool=False)
Get statistics as a sorted list of Statistic instances grouped by group_by:
group_by description 'filename' filename 'lineno' filename and line number 'traceback' traceback
If cumulative is True, cumulate size and count of memory blocks of all frames of the traceback of a trace, not only the most recent frame. The cumulative mode can only be used with group_by equals to 'filename' and 'lineno'.
The result is sorted from the biggest to the s