code: def return_xml(element_tree):
      
      if isinstance(element_tree, ET.Element):
          return element_tree
      try:
          return ET.fromstring(element_tree)
      except TypeError:
          raise TypeError('{} takes either {} or {} type.'
                          .format(repr(return_xml.__name__),
                                  repr(str.__name__),
                                  repr(ET.Element.__name__)))
docs: Return an XML Element.
  
          Args:
              element_tree (Element): XML Element to be returned.  If sent as a
                  ``str``, this function will attempt to convert it to an
                  ``Element``.
  
          Returns:
              Element: An XML Element.
  
          Raises:
              TypeError: if `element_tree` is not of type ``Element`` and it
                  cannot be converted from a ``str``.
  
          Examples:
              >>> import pynos.utilities
              >>> import xml.etree.ElementTree as ET
              >>> ele = pynos.utilities.return_xml(ET.Element('config'))
              >>> assert isinstance(ele, ET.Element)
              >>> ele = pynos.utilities.return_xml('<config />')
              >>> assert isinstance(ele, ET.Element)
              >>> ele = pynos.utilities.return_xml(
              ... ['hodor']) # doctest: +IGNORE_EXCEPTION_DETAIL
              Traceback (most recent call last):
              TypeError