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Mapping Protocol — Python v3.0 documentation

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_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, 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, 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. This is equivalent to the Python expression o.keys().

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

On success, return a list of the values in object o. On failure, return NULL. This is equivalent to the Python expression o.values().

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. This is equivalent to the Python expression o.items().

PyObject* PyMapping_GetItemString(PyObject *o, 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, 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.