with open('output_symbols_pin.csv', 'r') as f: reader = csv.reader(f) new_rows = [] for row in reader: if row[3].isdigit(): new_row = row[:3]+['']+row[3:] new_rows.append(new_row) else: new_rows.append(row) with open('ot_symbols_pin.csv.csv','w',newline='') as f: writer = csv.writer(f) writer.writerows(new_rows)这一段代码运行后为什么会出现IndexError: list index out of range这个错误
时间: 2024-03-06 19:47:23 浏览: 76
:face_with_symbols_on_mouth:清理风俗话-Node.js开发
这个错误很可能是因为读取的某一行的列数小于 4(即小于等于第四列),导致在访问 row[3] 时出现了 IndexError 异常。可以在代码中加一个判断语句来避免这种情况的发生,例如:
```python
import csv
with open('output_symbols_pin.csv', 'r') as f:
reader = csv.reader(f)
new_rows = []
for row in reader:
if len(row) > 3 and row[3].isdigit():
new_row = row[:3]+['']+row[3:]
new_rows.append(new_row)
else:
new_rows.append(row)
with open('ot_symbols_pin.csv.csv', 'w', newline='') as f:
writer = csv.writer(f)
writer.writerows(new_rows)
```
在这个示例代码中,加了一个判断条件 `len(row) > 3`,用来判断当前行的列数是否大于 3,只有大于 3 的行才能进入 if 语句进行处理。这样就能避免访问 row[3] 时出现 IndexError 异常的情况。
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