セイバーメトリクス計算クラス(抜粋)

stats.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

__author__ = 'Shinichi Nakagawa'


class Stats(object):

    def __init__(self):
        pass
    
    # 省略
    
    @classmethod
    def whip(cls, bb, h, ip):
        """
        Walks + Hits / IP
        :param bb: base on ball
        :param h: hits
        :param ip: inning pitched
        :return: (float) whip
        """
        return round((bb + h) / ip, 3)

    # 省略

    @classmethod
    def rc(cls, h, bb, hbp, cs, gidp, sf, sh, sb, so, ab, ibb, single, _2b, _3b, hr):
        """
        Runs Created of 2002 ver.
        [note]
        http://en.wikipedia.org/wiki/Runs_created#2002_version_of_runs_created
        :param h: hits
        :param bb: base on ball
        :param hbp: hit by pitch
        :param cs: caught stealing
        :param gidp: ground into duble play
        :param tb: total bases
        :param sf: sacrifice fly
        :param sh: sacrifice hit
        :param sb: stolen base
        :param so: strike out
        :param ab: at bat
        :param ibb: intentional base on balls
        :param single: single hits
        :param _2b: double
        :param _3b: triple
        :param hr: home run
        :return: (float) run created
        """
        # (出塁能力A * 進塁能力B) / 出塁機会C
        custom_tb = round(1.125 * single) + round(1.69 * _2b) + round(3.02 * _3b) + round(3.73 * hr)
        a = h + bb + hbp - cs - gidp
        b = custom_tb + round(0.29 * (bb + hbp - ibb)) + round(0.492 * (sf + sh + sb)) - round(0.04 * so)
        c = ab + bb + hbp + sf + sh
        a_b = round(a + 2.4 * c) * (b + 3 * c)
        _9c = 9 * c
        _09c = round(0.9 * c)
        rc = round(a_b / _9c - _09c, 1)
        return rc