NDOJ/judge/utils/ranker.py

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2020-01-21 06:35:58 +00:00
from operator import attrgetter
def ranker(iterable, key=attrgetter('points'), rank=0):
delta = 1
last = None
for item in iterable:
new = key(item)
if new != last:
rank += delta
delta = 0
delta += 1
yield rank, item
last = key(item)