The csv file is like below:

```
[0,0,0]
[]
[1,1]
[]
[]

```

I tried

```
with open('test.csv','r') as r, open('write.csv', 'w') as w:
    for line in r:
        line = line[1:-2]
        w.write(line + '\n')

```

but it outcomes

```
0,0,0
]
1,1
]
]

```

which should be:

```
0,0,0

1,1

```

That was weird for the empty list line, I have to do `line[1:-3]` to clean the line, but for the non-empty line with `line[1:-2]`

Here was how I wrote data into csv file:

```
list = [[0,0,0],[],[1,1],[],[]]

with open ('test.csv','a') as w:
    w = csv.writer(w, delimiter = '\n')
    w.writerow(list)
    w.close

```