"""Mathematical helpers."""
+import collections
import functools
import math
from heapq import heappop, heappush
-from typing import List, Optional
+from typing import Dict, List, Optional, Tuple
+
+import dict_utils
class NumericPopulation(object):
count = len(self.lowers) + len(self.highers)
return self.aggregate / count
+ def get_mode(self) -> Tuple[float, int]:
+ """Returns the mode (most common member)."""
+
+ count: Dict[float, int] = collections.defaultdict(int)
+ for n in self.lowers:
+ count[-n] += 1
+ for n in self.highers:
+ count[n] += 1
+ return dict_utils.item_with_max_value(count)
+
def get_stdev(self) -> float:
"""Returns the stdev so far in O(n) time."""