Issues with yaml list parsing

[UtkarshBhatthere]

19:39:47 - INFO     - cbt      - Running rbd fio baseline_latency test, mode ['randwrite', 'randread']
19:39:47 - ERROR    - cbt      - During tests
Traceback (most recent call last):
  File "/home/ubuntu/cbt/cbt.py", line 92, in main
    b.run()
  File "/home/ubuntu/cbt/benchmark/librbdfio.py", line 245, in run
    self.run_workloads()
  File "/home/ubuntu/cbt/benchmark/librbdfio.py", line 186, in run_workloads
    self.run_dir =  ( f'{self.base_run_dir}/{self.mode}_{int(self.op_size)}/'
                                                         ^^^^^^^^^^^^^^^^^
TypeError: int() argument must be a string, a bytes-like object or a real number, not 'list'

The test in question is

      baseline_latency:
        jobname: "1_latency_floor"
        mode: ["randwrite", "randread"] # Test both R and W
        op_size: [4096, 8192] # 4K (Standard), 8K (Postgres Page)
        iodepth: [1] # STRICTLY 1
        numjobs: [1] # STRICTLY 1 process per client
        procs_per_client: [1]

[Shra-05]

Hi, thanks for reporting this issue.

It looks like op_size is being parsed as a list from the YAML config, but later treated as a scalar when passed to int(), which causes the TypeError.

I’d like to explore a fix that either validates op_size as a single value or properly iterates over multiple values if a list is provided.
May I work on this?