utils.py 文件源码

def to_frozenset(item):
    """Recursively convert 'item' to a frozenset"""
    if isinstance(item, Hashable):
        return item

    if isinstance(item, dict):
        return frozenset([(k, to_frozenset(v)) for k, v in item.items()])

    if isinstance(item, list):
        return frozenset([to_frozenset(v) for v in item])