code: def setup(self):
          
  
          if self.parent.config.option.current_env:
              kernel_name = CURRENT_ENV_KERNEL_NAME
          else:
              kernel_name = self.nb.metadata.get(
                  'kernelspec', {}).get('name', 'python')
          self.kernel = RunningKernel(kernel_name, str(self.fspath.dirname))
          self.setup_sanitize_files()
          if getattr(self.parent.config.option, 'cov_source', None):
              setup_coverage(self.parent.config, self.kernel, getattr(self, "fspath", None))
docs: Called by pytest to setup the collector cells in .
          Here we start a kernel and setup the sanitize patterns.