def find_folder(self, parent_id):
body = soap_request.find_folder(parent_id=parent_id, format=u'<STR_LIT>')<EOL>response_xml = self.service.send(body)<EOL>return self._parse_response_for_find_folder(response_xml)<EOL>
find_folder(parent_id)
:param str parent_id:  The parent folder to list.

This method will return a list of sub-folders to a given parent folder.

**Examples**::

  # Iterate through folders within the default 'calendar' folder.
  folders = service.folder().find_folder(parent_id='calendar')
  for folder in folders:
    print(folder.display_name)

  # Delete all folders within the 'calendar' folder.
  folders = service.folder().find_folder(parent_id='calendar')
  for folder in folders:
    folder.delete()