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Pythonで書くシンプルなガチャロジック

Last updated at Posted at 2020-05-03

内容

アイテム別に重み付けをしてn連ガチャを行います

パラメータ

パラメータとして以下の物を用意

# 抽選対象のアイテムIDと重みのdictionary
item_dic = {"id_1":1,"id_2":5,"id_3":14,"id_4":30,"id_5":50}
# 抽選回数
times = 11

ガチャ処理の関数

import random
def gacha(item_dic, times):
	total_weight = 0
	for value in item_dic.values():
		total_weight += value

	results = []
	for i in range(times):
	    results.append(lottery(item_dic,total_weight))

    return results

def lottery(item_dic, total_weight):
	score = random.randint(1,total_weight)
	range_max = 0
	for item_key, weight in item_dic.items():
		range_max += weight
		if score <= range_max:
			return item_key			

ガチャを実行

item_list = gacha(item_dic, times)

もう少し綺麗な書き方があると思いますが、とりあえず。

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