68 lines
1.6 KiB
Python
68 lines
1.6 KiB
Python
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#!/usr/bin/env python
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# -*- encoding: utf-8 -*-
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'''
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@File : elo.py
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@Author : liuyihui
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@Email : liuyihui02@gmail.com
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'''
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# here put the import lib
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import math
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from typing_extensions import Self
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class Person(object):
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'''personal information
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Attributes
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----------
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rate : elo rate
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name : name
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sex : male or female
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link : baike link
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Methods
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-------
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compute_K : compute the constant K
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'''
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def __init__(self, name: str, rate: float = 1400, *, sex: str = None, link: str = None) -> None:
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self.name = name
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self.rate = rate
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self.link = link
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if sex and sex not in ['male', 'female']:
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raise ValueError("Sex must be male or female")
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self.sex = sex
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def compute_wre(self, B: Self) -> float:
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'''compute win rate expectation (wre for short)
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Parameters
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----------
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B : another person
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Returns
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-------
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wre : win rate expectation
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'''
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wre = 1 / (1 + math.pow(10, (B.rate-self.rate)/400))
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return wre
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def compute_K(self) -> float:
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if self.rate > 2400:
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return 12
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elif self.rate > 2000:
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return 24
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else:
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return 36
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def set_result(self, wre: float, res: float) -> None:
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'''set result of this game
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Parameters
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----------
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wre : win rate expectation
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res : the result, 0 for lose, 1 for win and 0.5 for draw
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'''
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K = self.compute_K()
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self.rate += K * (res - wre)
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