56 lines
1.2 KiB
Python
56 lines
1.2 KiB
Python
#!/usr/bin/env python
|
|
# -*- encoding: utf-8 -*-
|
|
'''
|
|
@File : elo.py
|
|
@Author : liuyihui
|
|
@Email : liuyihui02@gmail.com
|
|
'''
|
|
|
|
# here put the import lib
|
|
import math
|
|
from .db_init import Person
|
|
|
|
def __compute_wre(A: Person, B: Person) -> float:
|
|
'''compute win rate expectation (wre for short)
|
|
|
|
Parameters
|
|
----------
|
|
A, B : two persons
|
|
|
|
Returns
|
|
-------
|
|
wre : win rate expectation of A
|
|
'''
|
|
wre = 1 / (1 + math.pow(10, (B.rate-A.rate)/400))
|
|
return wre
|
|
|
|
def __compute_K(P: Person) -> float:
|
|
if P.rate > 2400:
|
|
return 12
|
|
elif P.rate > 1900:
|
|
return 24
|
|
else:
|
|
return 36
|
|
|
|
def __add_history(P: Person):
|
|
P.count += 1
|
|
if P.count % 10 == 0:
|
|
P.hist += str('{:.2f}'.format(P.rate))
|
|
|
|
def set_result(A: Person, B: Person, res: float) -> None:
|
|
'''set result of this game
|
|
|
|
Parameters
|
|
----------
|
|
A, B : two persons
|
|
res : the result, 0 for A win, 1 for B win and -1 for draw
|
|
'''
|
|
wre1 = __compute_wre(A, B)
|
|
wre2 = 1 - wre1
|
|
if res >= 0:
|
|
A.rate += __compute_K(A) * (1 - res - wre1)
|
|
B.rate += __compute_K(B) * (res - wre2)
|
|
|
|
__add_history(A)
|
|
__add_history(B)
|