Operator Reference

HALCON Operator Reference / Tuple / Data Containers
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get_dict_objectT_get_dict_objectGetDictObjectGetDictObjectget_dict_object (Operator)

get_dict_objectT_get_dict_objectGetDictObjectGetDictObjectget_dict_object — Retrieve an object associated with the key from the dictionary.

Signature

get_dict_object( : Object : DictHandle, Key : )

Herror T_get_dict_object(Hobject* Object, const Htuple DictHandle, const Htuple Key)

void GetDictObject(HObject* Object, const HTuple& DictHandle, const HTuple& Key)

HObject HDict::GetDictObject(const HTuple& Key) const

HObject HDict::GetDictObject(const HString& Key) const

HObject HDict::GetDictObject(const char* Key) const

HObject HDict::GetDictObject(const wchar_t* Key) const   ( Windows only)

static void HOperatorSet.GetDictObject(out HObject objectVal, HTuple dictHandle, HTuple key)

HObject HDict.GetDictObject(HTuple key)

HObject HDict.GetDictObject(string key)

def get_dict_object(dict_handle: HHandle, key: Union[str, int]) -> HObject

Description

get_dict_objectget_dict_objectGetDictObjectGetDictObjectget_dict_object retrieves an object associated with the KeyKeyKeykeykey from the dictionary denoted by the DictHandleDictHandleDictHandledictHandledict_handle. The object has to be previously stored to the dictionary using set_dict_objectset_dict_objectSetDictObjectSetDictObjectset_dict_object.

The operator returns the data in the parameter ObjectObjectObjectobjectValobject. The iconic object is copied by the operation. Therefore, clearing or reusing the dictionary object afterwards will not have any side-effect on the returned iconic object.

If the given KeyKeyKeykeykey is not present in the dictionary or if the data associated with the key is not an object, get_dict_objectget_dict_objectGetDictObjectGetDictObjectget_dict_object fails. Presence of keys and information about the data associated with the key can be verified using get_dict_paramget_dict_paramGetDictParamGetDictParamget_dict_param.

HDevelop In-line Operation

HDevelop provides an in-line operation for get_dict_objectget_dict_objectGetDictObjectGetDictObjectget_dict_object, which can be used in an expression in the following syntax:

  • Dynamic syntax:

    Object := DictHandle.['Key']

  • Static syntax:

    Object := DictHandle.Key

Execution Information

  • Multithreading type: reentrant (runs in parallel with non-exclusive operators).
  • Multithreading scope: global (may be called from any thread).
  • Processed without parallelization.

Parameters

ObjectObjectObjectobjectValobject (output_object)  object(-array) → objectHObjectHObjectHObjectHobject *

Object value retrieved from the dictionary.

DictHandleDictHandleDictHandledictHandledict_handle (input_control)  dict → HDict, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)

Dictionary handle.

Number of elements: DictHandle == 1

KeyKeyKeykeykey (input_control)  string → HTupleUnion[str, int]HTupleHtuple (string / integer) (string / int / long) (HString / Hlong) (char* / Hlong)

Key string.

Number of elements: Key == 1

Restriction: length(Key) > 0

Example (HDevelop)

* ...
get_dict_param (Dict, 'key_exists', ['simple_string','foo','my_image'], \
                KeysPresence)
get_dict_param (Dict, 'key_data_type', ['simple_string','my_image'], \
                KeysType)
get_dict_object (Image, Dict, 'my_image')

Result

If the operation succeeds, get_dict_objectget_dict_objectGetDictObjectGetDictObjectget_dict_object returns 2 ( H_MSG_TRUE) . Otherwise an exception is raised. Possible error conditions include invalid parameters (handle or key), the required key not found in the dictionary or other than object data associated with given key.

Possible Predecessors

set_dict_objectset_dict_objectSetDictObjectSetDictObjectset_dict_object

Possible Successors

get_dict_objectget_dict_objectGetDictObjectGetDictObjectget_dict_object

Alternatives

get_dict_tupleget_dict_tupleGetDictTupleGetDictTupleget_dict_tuple

See also

create_dictcreate_dictCreateDictCreateDictcreate_dict, set_dict_tupleset_dict_tupleSetDictTupleSetDictTupleset_dict_tuple, get_dict_tupleget_dict_tupleGetDictTupleGetDictTupleget_dict_tuple, set_dict_objectset_dict_objectSetDictObjectSetDictObjectset_dict_object, remove_dict_keyremove_dict_keyRemoveDictKeyRemoveDictKeyremove_dict_key, get_dict_paramget_dict_paramGetDictParamGetDictParamget_dict_param

Module

Foundation

ClassesClasses | | Operators