python - 皮林特 R1720 : Unnecessary "elif" after "raise" (no-else-raise)

Question

我有以下代码

    if self.download_format == 'mp3':
        raise NotImplementedError
    elif self.download_format == 'wav':
        with NamedTemporaryFile(suffix='.wav') as wavfile:
            self.download_wav_recording(call, wavfile.name)
            convert_wav_to_mp3(wavfile.name, filename)

并且pylint报告这个错误

R1720: Unnecessary "elif" after "raise" (no-else-raise)

这个错误的动机是什么？为什么这段代码不对？

Answer 1

    if self.download_format == 'mp3':
        raise NotImplementedError
    elif self.download_format == 'wav':
        with NamedTemporaryFile(suffix='.wav') as wavfile:
            self.download_wav_recording(call, wavfile.name)
            convert_wav_to_mp3(wavfile.name, filename)

这相当于

    if self.download_format == 'mp3':
        raise NotImplementedError
    if self.download_format == 'wav':
      with NamedTemporaryFile(suffix='.wav') as wavfile:
          self.download_wav_recording(call, wavfile.name)
          convert_wav_to_mp3(wavfile.name, filename)

因此来自 pylint 的警告

raise 导致控制流中断 - 因此您不需要使用 elif 并且可以使用 if 代替