def iter_fields(node):
    for field in node._fields:
        try:
            yield field, getattr(node, field)
        except AttributeError:
            pass
provides common functionality for get_acl() and get_def_acl()
dataset/ETHPy150Open eBay/restcommander/play-1.2.4/python/Lib/ast.py/iter_fields--crossover with--dataset/ETHPy150Open yyuu/botornado/boto/gs/bucket.py/Bucket.get_acl_helper