# Protocole de correspondance

Voir aussi `PyObject_GetItem()`, `PyObject_SetItem()` et `PyObject_DelItem()`.

int PyMapping_Check(PyObject *o)
  Part of the Stable ABI.

  Return `1` if the object provides the mapping protocol or supports slicing, and `0` otherwise. Note that it returns `1` for Python classes with a `__getitem__()` method, since in general it is impossible to determine what type of keys the class supports. This function always succeeds.

Py_ssize_t PyMapping_Size(PyObject *o)
Py_ssize_t PyMapping_Length(PyObject *o)
  Part of the Stable ABI.

  Renvoie le nombre de clefs dans l'objet o et `-1` en cas d'échec. C'est l'équivalent de l'expression Python `len(o)`.

PyObject *PyMapping_GetItemString(PyObject *o, const char *key)
  Valeur de retour : nouvelle référence. Part of the Stable ABI.

  This is the same as `PyObject_GetItem()`, but key is specified as a const char* UTF-8 encoded bytes string, rather than a PyObject*.

int PyMapping_GetOptionalItem(PyObject *obj, PyObject *key, PyObject **result)
  Part of the Stable ABI since version 3.13.

  Variant of `PyObject_GetItem()` which doesn't raise `KeyError` if the key is not found.

  If the key is found, return `1` and set *result to a new strong reference to the corresponding value. If the key is not found, return `0` and set *result to `NULL`; the `KeyError` is silenced. If an error other than `KeyError` is raised, return `-1` and set *result to `NULL`.

  Ajouté dans la version 3.13.

int PyMapping_GetOptionalItemString(PyObject *obj, const char *key, PyObject **result)
  Part of the Stable ABI since version 3.13.

  This is the same as `PyMapping_GetOptionalItem()`, but key is specified as a const char* UTF-8 encoded bytes string, rather than a PyObject*.

  Ajouté dans la version 3.13.

int PyMapping_SetItemString(PyObject *o, const char *key, PyObject *v)
  Part of the Stable ABI.

  This is the same as `PyObject_SetItem()`, but key is specified as a const char* UTF-8 encoded bytes string, rather than a PyObject*.

int PyMapping_DelItem(PyObject *o, PyObject *key)

  This is an alias of `PyObject_DelItem()`.

int PyMapping_DelItemString(PyObject *o, const char *key)

  This is the same as `PyObject_DelItem()`, but key is specified as a const char* UTF-8 encoded bytes string, rather than a PyObject*.

int PyMapping_HasKeyWithError(PyObject *o, PyObject *key)
  Part of the Stable ABI since version 3.13.

  Return `1` if the mapping object has the key key and `0` otherwise. This is equivalent to the Python expression `key in o`. On failure, return `-1`.

  Ajouté dans la version 3.13.

int PyMapping_HasKeyStringWithError(PyObject *o, const char *key)
  Part of the Stable ABI since version 3.13.

  This is the same as `PyMapping_HasKeyWithError()`, but key is specified as a const char* UTF-8 encoded bytes string, rather than a PyObject*.

  Ajouté dans la version 3.13.

int PyMapping_HasKey(PyObject *o, PyObject *key)
  Part of the Stable ABI.

  Renvoie `1` si l'objet de correspondance possède une clef key et `0` sinon. C'est l'équivalent de l'expression Python `key in o`. Cette fonction ne provoque jamais d'erreur.

  Note

  Exceptions which occur when this calls `__getitem__()` method are silently ignored. For proper error handling, use `PyMapping_HasKeyWithError()`, `PyMapping_GetOptionalItem()` or `PyObject_GetItem()` instead.

int PyMapping_HasKeyString(PyObject *o, const char *key)
  Part of the Stable ABI.

  This is the same as `PyMapping_HasKey()`, but key is specified as a const char* UTF-8 encoded bytes string, rather than a PyObject*.

  Note

  Exceptions that occur when this calls `__getitem__()` method or while creating the temporary `str` object are silently ignored. For proper error handling, use `PyMapping_HasKeyStringWithError()`, `PyMapping_GetOptionalItemString()` or `PyMapping_GetItemString()` instead.

PyObject *PyMapping_Keys(PyObject *o)
  Valeur de retour : nouvelle référence. Part of the Stable ABI.

  Renvoie la liste des clefs dans l'objet o. En cas d'échec, renvoie NULL.

  Modifié dans la version 3.7: Auparavant, la fonction renvoyait une liste ou un n-uplet.

PyObject *PyMapping_Values(PyObject *o)
  Valeur de retour : nouvelle référence. Part of the Stable ABI.

  Renvoie la liste des valeurs dans l'objet o. En cas d'échec, renvoie NULL.

  Modifié dans la version 3.7: Auparavant, la fonction renvoyait une liste ou un n-uplet.

PyObject *PyMapping_Items(PyObject *o)
  Valeur de retour : nouvelle référence. Part of the Stable ABI.

  Renvoie la liste des éléments dans l'objet o, où chaque élément est un n-uplet contenant une paire clef-valeur. En cas d'échec, renvoie NULL.

  Modifié dans la version 3.7: Auparavant, la fonction renvoyait une liste ou un n-uplet.