def append(self, query_part):
if not is_sql_instance(query_part):
raise SqlPuzzleException('Appended item must be instance of QueryPart, not %s.' % type(query_part))
super().append(query_part)
def wrapper(self, *args, **kwds):
if not kwds and len(args) == 1 and is_sql_instance(args[0]):
self.append_part(args[0])
return self
return func(self, *args, **kwds)