def get_metadata_from_file(source_path, config=None, lang=None):
 try:
  if (lang and config):
   source_path = get_translation_candidate(config, source_path, lang)
  elif lang:
   source_path += (u'.' + lang)
  with io.open(source_path, u'r', encoding=u'utf-8-sig') as meta_file:
   meta_data = [x.strip() for x in meta_file.readlines()]
  return _get_metadata_from_file(meta_data)
 except (UnicodeDecodeError, UnicodeEncodeError):
  raise ValueError(u'Error reading {0}: Nikola only supports UTF-8 files'.format(source_path))
 except Exception:
  return {}

def get_metadata_from_file ( source_path , config = None , lang = None ) : try : if ( lang and config ) : source_path = get_translation_candidate ( config , source_path , lang ) elif lang : source_path += ( u'.' + lang ) with io . open ( source_path , u'r' , encoding = u'utf-8-sig' ) as meta_file : meta_data = [ x . strip ( ) for x in meta_file . readlines ( ) ] return _get_metadata_from_file ( meta_data ) except ( UnicodeDecodeError , UnicodeEncodeError ) : raise ValueError ( u'Error reading {0}: Nikola only supports UTF-8 files' . format ( source_path ) ) except Exception : return { }
extract metadata from the file itself .