想构造层次分析中的成对比较阵（正互反阵），如下图所示：（取自姜启源《数学模型》）
** 我的代码如下：**
```import csv
import numpy as np
import pandas as pd
event_data = pd.read_csv('event.csv',usecols=[5])
attack_data = pd.read_csv('attack.csv',usecols=[5])
weapon_data = pd.read_csv('weapon.csv',usecols=[5])
target_data = pd.read_csv('target.csv',usecols=[7])
assassin_dat = pd.read_csv('assassin.csv',usecols=[26])
casualty_data = pd.read_csv('casualty.csv',usecols=[17])
for i in np.transpose(event_data):
for j in np.transpose(event_data):
A = np.array((i/j).reshape(114183,114183))
print(A)
**运行结果反馈为：**
A = np.array((i/j).reshape(114183,114183))
ZeroDivisionError: division by zero
请问各位大佬，我的代码到底在哪里出现问题了？
