随着Python中的每个循环迭代使用生成的文件进行子进程调用

I have one input file (inputFile) that needs to undergo six filtering steps with six different 'BED' files. After every single filter, there results a new input file. I need to use these for input to the next iteration of my loop and so on until the initial file has undergone six iterations with all six of my BED files. I have one input file (inputFile) that needs to