Objetos Dictionary

PyDictObject

Este subtipo do PyObject representa um objeto dicionário Python.

PyTypeObject PyDict_Type

This instance of PyTypeObject represents the Python dictionary type. This is exposed to Python programs as dict and types.DictType.

int PyDict_Check(PyObject *p)

Retorna verdadeiro se p é um objeto dict ou uma instância de um subtipo do tipo dict.

Alterado na versão 2.2: Allowed subtypes to be accepted.

int PyDict_CheckExact(PyObject *p)

Return true if p is a dict object, but not an instance of a subtype of the dict type.

Novo na versão 2.4.

PyObject* PyDict_New()

Return value: New reference.

Return a new empty dictionary, or NULL on failure.

PyObject* PyDictProxy_New(PyObject *dict)

Return value: New reference.

Return a proxy object for a mapping which enforces read-only behavior. This is normally used to create a proxy to prevent modification of the dictionary for non-dynamic class types.

Novo na versão 2.2.

void PyDict_Clear(PyObject *p)

Esvazie um dicionário existente de todos os pares chave-valor.

int PyDict_Contains(PyObject *p, PyObject *key)

Determine if dictionary p contains key. If an item in p is matches key, return 1, otherwise return 0. On error, return -1. This is equivalent to the Python expression key in p.

Novo na versão 2.4.

PyObject* PyDict_Copy(PyObject *p)

Return value: New reference.

Retorna um novo dicionário que contém o mesmo chave-valor como p.

Novo na versão 1.6.

int PyDict_SetItem(PyObject *p, PyObject *key, PyObject *val)

Insert value into the dictionary p with a key of key. key must be hashable; if it isn’t, TypeError will be raised. Return 0 on success or -1 on failure.

int PyDict_SetItemString(PyObject *p, const char *key, PyObject *val)

Insert value into the dictionary p using key as a key. key should be a char*. The key object is created using PyString_FromString(key). Return 0 on success or -1 on failure.

int PyDict_DelItem(PyObject *p, PyObject *key)

Remove the entry in dictionary p with key key. key must be hashable; if it isn’t, TypeError is raised. Return 0 on success or -1 on failure.

int PyDict_DelItemString(PyObject *p, char *key)

Remove a entrada no dicionário p, que possui uma chave especificada pela string chave. Retorna `` 0`` em caso de sucesso ou `` -1`` em caso de falha.

PyObject* PyDict_GetItem(PyObject *p, PyObject *key)

Return value: Borrowed reference.

Return the object from dictionary p which has a key key. Return NULL if the key key is not present, but without setting an exception.

PyObject* PyDict_GetItemString(PyObject *p, const char *key)

Return value: Borrowed reference.

This is the same as PyDict_GetItem(), but key is specified as a char*, rather than a PyObject*.

PyObject* PyDict_Items(PyObject *p)

Return value: New reference.

Return a PyListObject containing all the items from the dictionary, as in the dictionary method dict.items().

PyObject* PyDict_Keys(PyObject *p)

Return value: New reference.

Return a PyListObject containing all the keys from the dictionary, as in the dictionary method dict.keys().

PyObject* PyDict_Values(PyObject *p)

Return value: New reference.

Return a PyListObject containing all the values from the dictionary p, as in the dictionary method dict.values().

Py_ssize_t PyDict_Size(PyObject *p)

Retorna o número de items no dicionário. Isso é equivalente à len(p) em um dicionário.

Alterado na versão 2.5: This function returned an int type. This might require changes in your code for properly supporting 64-bit systems.

int PyDict_Next(PyObject *p, Py_ssize_t *ppos, PyObject **pkey, PyObject **pvalue)

Iterate over all key-value pairs in the dictionary p. The Py_ssize_t referred to by ppos must be initialized to 0 prior to the first call to this function to start the iteration; the function returns true for each pair in the dictionary, and false once all pairs have been reported. The parameters pkey and pvalue should either point to PyObject* variables that will be filled in with each key and value, respectively, or may be NULL. Any references returned through them are borrowed. ppos should not be altered during iteration. Its value represents offsets within the internal dictionary structure, and since the structure is sparse, the offsets are not consecutive.

Por exemplo:

PyObject *key, *value;
Py_ssize_t pos = 0;

while (PyDict_Next(self->dict, &pos, &key, &value)) {
    /* do something interesting with the values... */
    ...
}

The dictionary p should not be mutated during iteration. It is safe (since Python 2.1) to modify the values of the keys as you iterate over the dictionary, but only so long as the set of keys does not change. For example:

PyObject *key, *value;
Py_ssize_t pos = 0;

while (PyDict_Next(self->dict, &pos, &key, &value)) {
    int i = PyInt_AS_LONG(value) + 1;
    PyObject *o = PyInt_FromLong(i);
    if (o == NULL)
        return -1;
    if (PyDict_SetItem(self->dict, key, o) < 0) {
        Py_DECREF(o);
        return -1;
    }
    Py_DECREF(o);
}

Alterado na versão 2.5: This function used an int * type for ppos. This might require changes in your code for properly supporting 64-bit systems.

int PyDict_Merge(PyObject *a, PyObject *b, int override)

Iterate over mapping object b adding key-value pairs to dictionary a. b may be a dictionary, or any object supporting PyMapping_Keys() and PyObject_GetItem(). If override is true, existing pairs in a will be replaced if a matching key is found in b, otherwise pairs will only be added if there is not a matching key in a. Return 0 on success or -1 if an exception was raised.

Novo na versão 2.2.

int PyDict_Update(PyObject *a, PyObject *b)

This is the same as PyDict_Merge(a, b, 1) in C, and is similar to a.update(b) in Python except that PyDict_Update() doesn’t fall back to the iterating over a sequence of key value pairs if the second argument has no “keys” attribute. Return 0 on success or -1 if an exception was raised.

Novo na versão 2.2.

int PyDict_MergeFromSeq2(PyObject *a, PyObject *seq2, int override)

Update or merge into dictionary a, from the key-value pairs in seq2. seq2 must be an iterable object producing iterable objects of length 2, viewed as key-value pairs. In case of duplicate keys, the last wins if override is true, else the first wins. Return 0 on success or -1 if an exception was raised. Equivalent Python (except for the return value):

def PyDict_MergeFromSeq2(a, seq2, override):
    for key, value in seq2:
        if override or key not in a:
            a[key] = value

Novo na versão 2.2.