code: def check_docstring(self, method):
          '''All methods should have a docstring.'''
          mn = method.__name__
          if method.__doc__ is None:
              return ['Missing docstring for method "{}"'.format(mn)f check_docstring(self, method):
          '''All methods should have a docstring.'''
          mn = method.__name__
          if method.__doc__ is None:
              return ['Missing docstring for method "{}"'.format(mn)]
docs: All methods should have a docstring.