根据Log表的data字段计算每个玩家的总得分

Posted 2020-10-20

需求：

    线上数据库的Log表的date字段记录了每个玩家在每一局的分数，现为了比较“每一局的分数和”与“score”字段的结果是否一致，需要计算每个玩家在每一局的分数总和。

分析：

mysql> select data from log where deskid=967745\G
*************************** 1. row ***************************
data: -12,26,-14,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466757,41515466757859;0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466827,41515466827895;5,-3,-2,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466885,41515466885924;-29,22,7,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,1,0,4,1515466944,41515466944957;-2,10,-8,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466994,41515466994989;-32,-11,43,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467022,415154670221;-7,17,-10,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467074,4151546707425;14,0,-14,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467126,4151546712649;-5,-3,8,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467191,4151546719180;0,-11,11,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467249,41515467249106;
1 row in set (0.04 sec)

    由以上查询结果可以看到，data字段将每一局的数据用“;”隔开。每一组数据的前三列（-12,26,-14,）代表了这一小局，三个玩家的分数。将每一组数据的第一列相加即为第一个玩家的总分数。

Linux Shell实现：

• 将data数据保存到变量data中：

# data='-12,26,-14,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466757,41515466757859;0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466827,41515466827895;5,-3,-2,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466885,41515466885924;-29,22,744,41515466944957;-2,10,-8,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466994,41515466994989;-32,-11,43,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467022,415154670221;-7,17,-10,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467074,410,0,4,1515467126,4151546712649;-5,-3,8,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467191,4151546719180;0,-11,11,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467249,41515467249106'
# echo $data
-12,26,-14,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466757,41515466757859 0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466827,41515466827895 5,-3,-2,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466885,41515466885924 -29,22,744,41515466944957 -2,10,-8,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466994,41515466994989 -32,-11,43,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467022,415154670221 -7,17,-10,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467074,410,0,4,1515467126,4151546712649 -5,-3,8,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467191,4151546719180 0,-11,11,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467249,41515467249106

• 将data变量中的内容保存到数组array中，并指定“;”为分隔符：

# array=($a)
# IFS=';'

• 遍历数组array，查看数组中的内容：

# for i in ${array[@]};do echo $i;done
-12,26,-14,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466757,41515466757859
0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466827,41515466827895
5,-3,-2,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466885,41515466885924
-29,22,7,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,1,0,4,1515466944,41515466944957
-2,10,-8,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466994,41515466994989
-32,-11,43,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467022,415154670221
-7,17,-10,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467074,4151546707425
14,0,-14,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467126,4151546712649
-5,-3,8,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467191,4151546719180
0,-11,11,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467249,41515467249106

• 求每个玩家的总分数：

# for i in ${array[@]};do echo $i;done | awk -F ',' '{sum+=$1} END{print sum}'
-68
# for i in ${array[@]};do echo $i;done | awk -F ',' '{sum+=$2} END{print sum}'
47
# for i in ${array[@]};do echo $i;done | awk -F ',' '{sum+=$3} END{print sum}'
21

Python实现：

• 将data数据保存到变量data中：

In [1]: data = '-12,26,-14,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466757,41515466757859;0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466827,41515466827895;5,-3,-2,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466885,41515466885924;-29,22,7,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,1,0,
   ...: 4,1515466944,41515466944957;-2,10,-8,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466994,41515466994989;-32,-11,43,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467022,415154670221;-7,17,-10,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467074,4151546707425;14,0,-14,0,1,0,0,0,0,
   ...: 0,0,0,0,0,0,0,0,0,0,0,4,1515467126,4151546712649;-5,-3,8,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467191,4151546719180;0,-11,11,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467249,41515467249106'

• 根据“;”将字符串data拆分，遍历拆分后的列表：

In [2]: for line in data.split(';'):
   ...:     print(line)
   ...:     
-12,26,-14,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466757,41515466757859
0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466827,41515466827895
5,-3,-2,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466885,41515466885924
-29,22,7,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,1,0,4,1515466944,41515466944957
-2,10,-8,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515466994,41515466994989
-32,-11,43,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467022,415154670221
-7,17,-10,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467074,4151546707425
14,0,-14,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467126,4151546712649
-5,-3,8,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467191,4151546719180
0,-11,11,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,4,1515467249,41515467249106

• 求第一个玩家的总分数：

In [3]: score1 = 0

In [4]: for line in data.split(';'):
   ...:     score1_tmp = line.split(',')[0]
   ...:     if score1_tmp:
   ...:         score1 += int(score1_tmp)
   ...: print(score1)
   ...: 
-68

PS：

    现阶段正在自学Python，但是线上业务并没有用到。只好将Shell实现的功能，用Python再实现一遍，以做练习。