python实现B站Bv号转Av号

﹏ヽ暗。殇╰゛Y 2022-12-14 13:53 18阅读 0赞

计算方法及每一步详解源自：https://www.bilibili.com/video/BV1R7411y7kw

python实现

import math def BvToAv(Bv): # 1.去除Bv号前的"Bv"字符 BvNo1 = Bv[2:] keys = { 
            '1': '13', '2': '12', '3': '46', '4': '31', '5': '43', '6': '18', '7': '40', '8': '28', '9': '5',
            'A': '54', 'B': '20', 'C': '15', 'D': '8', 'E': '39', 'F': '57', 'G': '45', 'H': '36', 'J': '38', 'K': '51',
            'L': '42', 'M': '49', 'N': '52', 'P': '53', 'Q': '7', 'R': '4', 'S': '9', 'T': '50', 'U': '10', 'V': '44',
            'W': '34', 'X': '6', 'Y': '25', 'Z': '1',
            'a': '26', 'b': '29', 'c': '56', 'd': '3', 'e': '24', 'f': '0', 'g': '47', 'h': '27', 'i': '22', 'j': '41',
            'k': '16', 'm': '11', 'n': '37', 'o': '2',
            'p': '35', 'q': '21', 'r': '17', 's': '33', 't': '30', 'u': '48', 'v': '23', 'w': '55', 'x': '32', 'y': '14',
            'z': '19'
    
        }
        # 2. 将key对应的value存入一个列表
        BvNo2 = []
        for index, ch in enumerate(BvNo1):
            BvNo2.append(int(str(keys[ch])))
    
        # 3. 对列表中不同位置的数进行*58的x次方的操作
    
        BvNo2[0] = int(BvNo2[0] * math.pow(58, 6))
        BvNo2[1] = int(BvNo2[1] * math.pow(58, 2))
        BvNo2[2] = int(BvNo2[2] * math.pow(58, 4))
        BvNo2[3] = int(BvNo2[3] * math.pow(58, 8))
        BvNo2[4] = int(BvNo2[4] * math.pow(58, 5))
        BvNo2[5] = int(BvNo2[5] * math.pow(58, 9))
        BvNo2[6] = int(BvNo2[6] * math.pow(58, 3))
        BvNo2[7] = int(BvNo2[7] * math.pow(58, 7))
        BvNo2[8] = int(BvNo2[8] * math.pow(58, 1))
        BvNo2[9] = int(BvNo2[9] * math.pow(58, 0))
    
        # 4.求出这10个数的合
        sum = 0
        for i in BvNo2:
            sum += i
        # 5. 将和减去100618342136696320
        sum -= 100618342136696320
        # 6. 将sum 与177451812进行异或
        temp = 177451812
    
        return sum ^ temp
    
    
    if __name__ == '__main__':
        Bv = input("请输入Bv号:")
        print(Bv + "的Av号为:av" + str(BvToAv(Bv)))
        print("链接地址为：http://www.bilibili.com/video/av" + str(BvToAv(Bv)))

运行结果：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMzA2MDQx_size_16_color_FFFFFF_t_70_pic_center]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMzA2MDQx_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/1f637d6788ff402a8617653560132e73.png