映射协议 ¶

另请参阅 PyObject_GetItem() , PyObject_SetItem() and PyObject_DelItem() .

int PyMapping_Check ( PyObject  *o ) ¶

返回 1 if the object provides mapping protocol or supports slicing, and 0 otherwise. Note that it returns 1 for Python classes with a __getitem__() method since in general case it is impossible to determine what the type of keys it supports. 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. This is equivalent to the Python expression len(o) .

PyObject * PyMapping_GetItemString ( PyObject  *o , const char  *key ) ¶

返回值：新引用。

Return element of o corresponding to the string key or NULL on failure. This is the equivalent of the Python expression o[key] 。另请参阅 PyObject_GetItem() .

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

Map the string key to the value v in object o 。返回 -1 on failure. This is the equivalent of the Python statement o[key] = v 。另请参阅 PyObject_SetItem() .

int PyMapping_DelItem ( PyObject  *o , PyObject  *key ) ¶

Remove the mapping for the object key from the object o 。返回 -1 on failure. This is equivalent to the Python statement del o[key] . This is an alias of PyObject_DelItem() .

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

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

int PyMapping_HasKey ( PyObject  *o , PyObject  *key ) ¶

返回 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.

Note that exceptions which occur while calling the __getitem__() method will get suppressed. To get error reporting use PyObject_GetItem() 代替。

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

返回 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.

Note that exceptions which occur while calling the __getitem__() method and creating a temporary string object will get suppressed. To get error reporting use PyMapping_GetItemString() 代替。

PyObject * PyMapping_Keys ( PyObject  *o ) ¶

返回值：新引用。

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

PyObject * PyMapping_Values ( PyObject  *o ) ¶

返回值：新引用。

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

PyObject * PyMapping_Items ( PyObject  *o ) ¶

返回值：新引用。

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

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