get_dict_paramT_get_dict_paramGetDictParamGetDictParamget_dict_param (算子)

名称

get_dict_paramT_get_dict_paramGetDictParamGetDictParamget_dict_param — 查询字典参数或有关字典的信息。

签名

描述

get_dict_paramget_dict_paramGetDictParamGetDictParamGetDictParamget_dict_param queries current values of dictionary parameters or other information about the dictionary status.

With each call of get_dict_paramget_dict_paramGetDictParamGetDictParamGetDictParamget_dict_param, only a single parameter value can be queried. However, there are two types of parameters/queries:

• Parameters/queries applicable to the entire dictionary. In this case no keys must be specified, the parameter KeyKeyKeyKeykeykey must be an empty tuple.

• Parameters/queries applicable to the individual keys. In this case a list of keys must be specified in the parameter KeyKeyKeyKeykeykey. The keys are processed in the same order as specified in the KeyKeyKeyKeykeykey parameter.

Key-independent (global) parameter names:

'keys'"keys""keys""keys""keys""keys"：

Queries all the keys stored in the dictionary, no matter whether they are associated with tuple or object data. The list of keys is reported as a string tuple via GenParamValueGenParamValueGenParamValueGenParamValuegenParamValuegen_param_value. For this query the parameter KeyKeyKeyKeykeykey must be an empty tuple.

Currently supported key-specific parameter names are:

'key_exists'"key_exists""key_exists""key_exists""key_exists""key_exists"：

Reports 1 if the given key is stored in the dictionary, 0 otherwise. The results are reported via GenParamValueGenParamValueGenParamValueGenParamValuegenParamValuegen_param_value, one value for each key.

'key_data_type'"key_data_type""key_data_type""key_data_type""key_data_type""key_data_type"：

Reports 'tuple'"tuple""tuple""tuple""tuple""tuple" for keys associated with tuple data within the dictionary (the data can be retrieved using get_dict_tupleget_dict_tupleGetDictTupleGetDictTupleGetDictTupleget_dict_tuple). Reports 'object'"object""object""object""object""object" for keys associated with object data (the data can be retrieved using get_dict_objectget_dict_objectGetDictObjectGetDictObjectGetDictObjectget_dict_object). The results are reported via GenParamValueGenParamValueGenParamValueGenParamValuegenParamValuegen_param_value, one value for each key. This parameter is useful to decide dynamically whether to use get_dict_tupleget_dict_tupleGetDictTupleGetDictTupleGetDictTupleget_dict_tuple or get_dict_objectget_dict_objectGetDictObjectGetDictObjectGetDictObjectget_dict_object to get the data of a specific key.

执行信息

• 多线程类型：可重入（与非独占算子并行运行）。
• 多线程作用域：全局（可从任何线程调用）。
• 未采用并行化处理。

参数

示例（HDevelop）

get_dict_param (Dict, 'keys', [], AllKeys)
get_dict_param (Dict, 'key_data_type', AllKeys, KeysType)

结果

If all the operator parameters, and the specified keys are valid, get_dict_paramget_dict_paramGetDictParamGetDictParamGetDictParamget_dict_param 返回 2 ( H_MSG_TRUE )。否则将抛出异常。

可能的前趋

create_dictcreate_dictCreateDictCreateDictCreateDictcreate_dict

另见

create_dictcreate_dictCreateDictCreateDictCreateDictcreate_dict, set_dict_tupleset_dict_tupleSetDictTupleSetDictTupleSetDictTupleset_dict_tuple, get_dict_tupleget_dict_tupleGetDictTupleGetDictTupleGetDictTupleget_dict_tuple, set_dict_objectset_dict_objectSetDictObjectSetDictObjectSetDictObjectset_dict_object, get_dict_objectget_dict_objectGetDictObjectGetDictObjectGetDictObjectget_dict_object, remove_dict_keyremove_dict_keyRemoveDictKeyRemoveDictKeyRemoveDictKeyremove_dict_key

模块

基础