使用Python删除或删除CSV文件中的最后一列

I have a CSV file with 5 columns. Using Python, how can I delete the last column (header5 in the example)? Is there an easy way I'm missing, or do I have to loop through all rows in the CSV and remove each value from the last column (which could still leave me with the undesired preceding comma)?I have a CSV file with 5 columns. Using Python,