2.5 版新增。
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() ).
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.
This is an instance of PyTypeObject representing the Python set 类型。
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.
返回 True 若 p 是 frozenset object or an instance of a subtype.
2.6 版新增。
返回 True 若 p 是 set 对象， frozenset object, or an instance of a subtype.
返回 True 若 p 是 set 对象或 frozenset object but not an instance of a subtype.
返回 True 若 p 是 frozenset object but not an instance of a subtype.
返回新的 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) ).
返回新的 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.
2.6 版改变： Now guaranteed to return a brand-new frozenset . Formerly, frozensets of zero-length were a singleton. This got in the way of building-up new frozensets with PySet_Add() .
The following functions and macros are available for instances of set or frozenset or instances of their subtypes.
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.
Changed in version 2.5: This function returned an int . This might require changes in your code for properly supporting 64-bit systems.
Macro form of PySet_Size() without error checking.
Return 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.
添加 key 到 set instance. Does not apply to frozenset instances. 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 is an not an instance of set or its subtype.
2.6 版改变： Now works with instances of frozenset or its subtypes. Like PyTuple_SetItem() in that it can be used to fill-in the values of brand new frozensets before they are exposed to other code.
The following functions are available for instances of set or its subtypes but not for instances of frozenset or its subtypes.
Return 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 is an not an instance of set or its subtype.
