集对象 ¶

This section details the public API for set and frozenset objects. Any functionality not listed below is best accessed using the either the abstract object protocol (including PyObject_CallMethod() , PyObject_RichCompareBool() , PyObject_Hash() , PyObject_Repr() , PyObject_IsTrue() , PyObject_Print() ，和 PyObject_GetIter() ) or the abstract number protocol (including PyNumber_And() , PyNumber_Subtract() , PyNumber_Or() , PyNumber_Xor() , PyNumber_InPlaceAnd() , PyNumber_InPlaceSubtract() , PyNumber_InPlaceOr() ，和 PyNumber_InPlaceXor() ).

PySetObject ¶

此子类型的 PyObject is used to hold the internal data for both set and frozenset objects. It is like a PyDictObject in that it is a fixed size for small sets (much like tuple storage) and will point to a separate, variable sized block of memory for medium and large sized sets (much like list storage). None of the fields of this structure should be considered public and are subject to change. All access should be done through the documented API rather than by manipulating the values in the structure.

PyTypeObject PySet_Type ¶

This is an instance of PyTypeObject representing the Python set 类型。

PyTypeObject PyFrozenSet_Type ¶

This is an instance of PyTypeObject representing the Python frozenset 类型。

The following type check macros work on pointers to any Python object. Likewise, the constructor functions work with any iterable Python object.

int PySet_Check ( PyObject  *p ) ¶

返回 True 若 p 是 set object or an instance of a subtype.

int PyFrozenSet_Check ( PyObject  *p ) ¶

返回 True 若 p 是 frozenset object or an instance of a subtype.

int PyAnySet_Check ( PyObject  *p ) ¶

返回 True 若 p 是 set object, a frozenset object, or an instance of a subtype.

int PyAnySet_CheckExact ( PyObject  *p ) ¶

返回 True 若 p 是 set object or a frozenset object but not an instance of a subtype.

int PyFrozenSet_CheckExact ( PyObject  *p ) ¶

返回 True 若 p 是 frozenset object but not an instance of a subtype.

PyObject * PySet_New ( PyObject  *iterable ) ¶

返回值：新引用。

返回新 set containing objects returned by the iterable 。 iterable 可以是 NULL to create a new empty set. Return the new set on success or NULL on failure. Raise TypeError if iterable is not actually iterable. The constructor is also useful for copying a set ( c=set(s) ).

PyObject * PyFrozenSet_New ( PyObject  *iterable ) ¶

返回值：新引用。

返回新 frozenset containing objects returned by the iterable . iterable 可以是 NULL to create a new empty frozenset. Return the new set on success or NULL on failure. Raise TypeError if iterable is not actually iterable.

The following functions and macros are available for instances of set or frozenset or instances of their subtypes.

Py_ssize_t PySet_Size ( PyObject  *anyset ) ¶

Return the length of a set or frozenset object. Equivalent to len(anyset) 。引发 PyExc_SystemError if anyset is not a set , frozenset , or an instance of a subtype.

Py_ssize_t PySet_GET_SIZE ( PyObject  *anyset ) ¶

Macro form of PySet_Size() without error checking.

int PySet_Contains ( PyObject  *anyset , PyObject  *key ) ¶

返回 1 if found, 0 if not found, and -1 if an error is encountered. Unlike the Python __contains__() method, this function does not automatically convert unhashable sets into temporary frozensets. Raise a TypeError 若 key is unhashable. Raise PyExc_SystemError if anyset is not a set , frozenset , or an instance of a subtype.

int PySet_Add ( PyObject  *set , PyObject  *key ) ¶

添加 key 到 set instance. Also works with frozenset instances (like PyTuple_SetItem() it can be used to fill-in the values of brand new frozensets before they are exposed to other code). Return 0 on success or -1 on failure. Raise a TypeError 若 key is unhashable. Raise a MemoryError if there is no room to grow. Raise a SystemError if set 不是实例化的 set or its subtype.

The following functions are available for instances of set or its subtypes but not for instances of frozenset or its subtypes.

int PySet_Discard ( PyObject  *set , PyObject  *key ) ¶

返回 1 if found and removed, 0 if not found (no action taken), and -1 if an error is encountered. Does not raise KeyError for missing keys. Raise a TypeError 若 key is unhashable. Unlike the Python discard() method, this function does not automatically convert unhashable sets into temporary frozensets. Raise PyExc_SystemError if set 不是实例化的 set or its subtype.

PyObject * PySet_Pop ( PyObject  *set ) ¶

返回值：新引用。

Return a new reference to an arbitrary object in the set , and removes the object from the set 。返回 NULL on failure. Raise KeyError if the set is empty. Raise a SystemError if set 不是实例化的 set or its subtype.

int PySet_Clear ( PyObject  *set ) ¶

Empty an existing set of all elements.

int PySet_ClearFreeList ( ) ¶

Clear the free list. Return the total number of freed items.

3.3 版新增。

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