If you need to customize a function , It contains a reference to an existing excel Deletion of blank values in the worksheet , And for new excel Carry out numerical calculation and analysis , Then the operation code of the user-defined function , Delete existing excel Blank values on the worksheet , Change how to write ?（ I don't know how to customize def Functions and dropna How to write in a nested way ）
（ Help , There is no error in this step, but the result is that it has not been realized , I don't know what to do ）
