json_util.py 文件源码

def object_hook(dct, compile_re=True):
    if "$oid" in dct:
        return ObjectId(str(dct["$oid"]))
    if "$ref" in dct:
        return DBRef(dct["$ref"], dct["$id"], dct.get("$db", None))
    if "$date" in dct:
        secs = float(dct["$date"]) / 1000.0
        return EPOCH_AWARE + datetime.timedelta(seconds=secs)
    if "$regex" in dct:
        flags = 0
        # PyMongo always adds $options but some other tools may not.
        for opt in dct.get("$options", ""):
            flags |= _RE_OPT_TABLE.get(opt, 0)

        if compile_re:
            return re.compile(dct["$regex"], flags)
        else:
            return Regex(dct["$regex"], flags)
    if "$minKey" in dct:
        return MinKey()
    if "$maxKey" in dct:
        return MaxKey()
    if "$binary" in dct:
        if isinstance(dct["$type"], int):
            dct["$type"] = "%02x" % dct["$type"]
        subtype = int(dct["$type"], 16)
        if subtype >= 0xffffff80:  # Handle mongoexport values
            subtype = int(dct["$type"][6:], 16)
        return Binary(base64.b64decode(dct["$binary"].encode()), subtype)
    if "$code" in dct:
        return Code(dct["$code"], dct.get("$scope"))
    if bson.has_uuid() and "$uuid" in dct:
        return bson.uuid.UUID(dct["$uuid"])
    return dct