请问这个两个中括号是什么意思呢?报错了,以下是报错内容
D:\SOFTWARE\Anaconda\envs\python36\python.exe D:/POSTGRADUATE/PYTHON_TASK/CSDN/Python数据处理_pandas读取csv文件_numpy进行归一化处理.py
File "D:/POSTGRADUATE/PYTHON_TASK/CSDN/Python数据处理_pandas读取csv文件_numpy进行归一化处理.py", line 23
ans = [][]
^
SyntaxError: invalid syntax
Process finished with exit code 1