Question

我在Python 3函数中具有以下代码块

try:
  score_string = subprocess.check_output([sys.executable, "-m", "query",
                                          lab,
                                          data_frame_path,
                                          prior_model_path,
                                          channel], stderr=subprocess.PIPE).decode('utf-8')
except subprocess.CalledProcessError as e:
  out_bytes = e.output       # Output generated before error
  err_bytes = e.stderr
  code = e.returncode   # Return code
  if log:
      log.error("Invocation of train_model on %s %s %s failed with error %d." %
                (lab, data_frame_path, prior_model_path, code))
      log.error("Error output is:")
      log.error(out_bytes.decode('utf-8'))
      if err_bytes is not None:
          log.error(err_bytes.decode('utf-8'))
      return None
return eval(score_string)

但是，当它在子流程中遇到错误时，它不会打印到stderr时的任何输出。我所看到的是：

2019-02-18 17:29:18 ERROR    Invocation of train_model on Transcriptic ../data/pipeline/experiment.r1bbm2c4eyvsp_amazed-sponge_mefl_hist\
.csv ../data/trained/pipeline_mefl_hist/ failed with error 1.
2019-02-18 17:29:18 ERROR    Error output is:
2019-02-18 17:29:18 ERROR

我怀疑我如何调用check_output，特别是stderr参数时遇到了问题。我已经阅读了文档，但是看不懂。我相信我必须做一些事情以捕捉stderr，以便将其插入CalledProcessError，但是我不知道该怎么做。

check_output中的CalledProcessError缺少stderr输出

0 个答案: