util.py 文件源码

def for_json(obj):
    if hasattr(obj, 'for_json'):
        return obj.for_json()
    elif isinstance(obj, datetime):
        return obj.isoformat()
    elif isinstance(obj, collections.Mapping):
        # This includes all types in debian.deb822.
        return {str(k): obj[k] for k in obj}
    elif isinstance(obj, (collections.Iterator, tuple, set, frozenset)):
        ### TODO: Sort sets and frozensets?
        return list(obj)
    else:
        try:
            data = vars(obj).copy()
        except TypeError:
            return repr(obj)
        else:
            data["__class__"] = type(obj).__name__
            return data