text: import importlib
  import os
  
  from ._core import ShellDetectionFailure
  
  
  __version__ = '1.2.7'
  
  
  def detect_shell(pid=None, max_depth=6):
      name = os.name
      try:
          impl = importlib.import_module('.' + name, __name__)
      except ImportError:
          raise RuntimeError(
              'Shell detection not implemented for {0!r}'.format(name),
          )
      try:
          get_shell = impl.get_shell
      except AttributeError:
          raise RuntimeError('get_shell not implemented for {0!r}'.format(name))
      shell = get_shell(pid, max_depth=max_depth)
      if shell:
          return shell
      raise ShellDetectionFailure()
  