init;add: elo algorithm

.gitignore

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+# env dir
+pyelo/
+
+# config file
+setup.cfg
+.vscode/

README.md

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+# ELOStar
+
+使用`ELO`算法实现明星好感度的比较，原型来自于`Mark Zuckerberg`的[`FaceMash`](https://en.wikipedia.org/wiki/History_of_Facebook#FaceMash)。

app.py

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+#!/usr/bin/env python
+# -*- encoding: utf-8 -*-
+'''
+@File  :   app.py
+@Author:   liuyihui
+@Email :   liuyihui02@gmail.com
+'''
+
+# here put the import lib
+from flask import Flask, request, render_template
+
+app = Flask(__name__)
+
+@app.route('/', methods=["GET"])
+def root():
+    return "Hello World!"
+
+
+if __name__ == '__main__':
+    app.run(debug=True, host='0.0.0.0', port=4002)

lib/elo.py

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

requirements.txt

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+flask