Mapping Protocol

int PyMapping_Check(PyObject *o)

Return 1 if the object provides mapping protocol, and 0 otherwise. This function always succeeds.

Py_ssize_t PyMapping_Size(PyObject *o)
Py_ssize_t PyMapping_Length(PyObject *o)

Returns the number of keys in object o on success, and -1 on failure. For objects that do not provide mapping protocol, this is equivalent to the Python expression len(o).

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

Remove the mapping for object key from the object o. Return -1 on failure. This is equivalent to the Python statement del o[key].

int PyMapping_DelItem(PyObject *o, PyObject *key)

Remove the mapping for object key from the object o. Return -1 on failure. This is equivalent to the Python statement del o[key].

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

On success, return 1 if the mapping object has the key key and 0 otherwise. This is equivalent to the Python expression key in o. This function always succeeds.

int PyMapping_HasKey(PyObject *o, PyObject *key)

Return 1 if the mapping object has the key key and 0 otherwise. This is equivalent to the Python expression key in o. This function always succeeds.

PyObject* PyMapping_Keys(PyObject *o)
Return value: New reference.

On success, return a list of the keys in object o. On failure, return NULL.

Changed in version 3.7: Previously, the function returned a list or a tuple.

PyObject* PyMapping_Values(PyObject *o)
Return value: New reference.

On success, return a list of the values in object o. On failure, return NULL.

Changed in version 3.7: Previously, the function returned a list or a tuple.

PyObject* PyMapping_Items(PyObject *o)
Return value: New reference.

On success, return a list of the items in object o, where each item is a tuple containing a key-value pair. On failure, return NULL.

Changed in version 3.7: Previously, the function returned a list or a tuple.

PyObject* PyMapping_GetItemString(PyObject *o, const char *key)
Return value: New reference.

Return element of o corresponding to the object key or NULL on failure. This is the equivalent of the Python expression o[key].

int PyMapping_SetItemString(PyObject *o, const char *key, PyObject *v)

Map the object key to the value v in object o. Returns -1 on failure. This is the equivalent of the Python statement o[key] = v.