After the completion of the basic functions using the UVM verification of the DUT, the need to find further use cases continue to return to the original bug DUT, here is my simple regression of a script (python), you can achieve a return to the use case, the script will do the follow-up further improvement:
1. create a list of return;
2. generate a random seed return;
3. os.system by the string into the command line.
