IndexError: list index out of range

目前代码如下：

def main():
    today = datetime.date.today()

    lis = []
    v = []
    f = open('基金数据.csv', 'rb')
    for line in f:
        line = line.decode().strip('\n')
        sj = line.split(',')
        lis.append('{0:0>6}'.format(sj[0]))
        # sj[4]=sj[4].replace(\,-)
        v.append(sj[1]+' '+sj[2]+' '+sj[3]+' '+sj[4].replace('/','-'))
    dic = dict(zip(lis, v))

出现报错如下：

Traceback (most recent call last):
  File "G:\Pycharm\PyCharm Community Edition 2020.1.1\plugins\python-ce\helpers\pydev\pydevd.py", line 1438, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "G:\Pycharm\PyCharm Community Edition 2020.1.1\plugins\python-ce\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "G:/Python/Pycharm/investment/auto invest.py", line 142, in <module>
    main()
  File "G:/Python/Pycharm/investment/auto invest.py", line 100, in main
    v.append(sj[1]+' '+sj[2]+' '+sj[3]+' '+sj[4].replace('/','-'))
IndexError: list index out of range

新手目前没有头绪是哪方面的问题，请教各位该如何解决，谢谢！

报错是指列表越越界，如果你的sj是有4列的话，sj下标应该从0开始，最大是sj[3],你取sj[4]就是越界

索引超出列表长度

python索引列表从0开始，之所以会出现索引越界的错误，是你文件中中至少有一行列数少于5个的。另外，对于csv文件，还是用csv模块来读更稳妥些，可以避免很多坑。