```
※按鈕二為清除用途，以下將它分割出來提供讀者觀察：
```python
@document["but2"].bind("click")
def delete(ev):
for row in document['one']:
row.remove()
```
第三步按鈕的設置即完成。
### 步驟四
實際看向近端瀏覽器，我們發現按下按鈕後還是無法執行，這時的問題參考[Brython documentation](https://www.brython.info/static_doc/en/cookbook/read_file.html)文章，內容說明讀取檔案內容時會因為讀取時間而無法正常輸出，其解為利用函數``將時間設置忽略(給予一個假(fake)的時間)，使用方法為：
```python
fake_qs = '?foo=%s' %time.time()
```
再來給予檔案名稱後方加上假的時間代碼：
```python
with open('./../../../../data/2a.txt'+fake_qs) as fh:
```
接著需要利用import來輸入time以及document以利執行，寫法為：
```python
import time
from browser import document
```
### 步驟五
最後整理好經過加工的分組程式碼，就可以進行執行的測試，以下為最後的程式：
```python
```
是不是都學會了呢？
也可以觀看網誌：
實際執行網址：
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