1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
.. highlight:: c
.. _listobjects:
List Objects
------------
.. index:: pair: object; list
.. c:type:: PyListObject
This subtype of :c:type:`PyObject` represents a Python list object.
.. c:var:: PyTypeObject PyList_Type
This instance of :c:type:`PyTypeObject` represents the Python list type.
This is the same object as :class:`list` in the Python layer.
.. c:function:: int PyList_Check(PyObject *p)
Return true if *p* is a list object or an instance of a subtype of the list
type. This function always succeeds.
.. c:function:: int PyList_CheckExact(PyObject *p)
Return true if *p* is a list object, but not an instance of a subtype of
the list type. This function always succeeds.
.. c:function:: PyObject* PyList_New(Py_ssize_t len)
Return a new list of length *len* on success, or ``NULL`` on failure.
.. note::
If *len* is greater than zero, the returned list object's items are
set to ``NULL``. Thus you cannot use abstract API functions such as
:c:func:`PySequence_SetItem` or expose the object to Python code before
setting all items to a real object with :c:func:`PyList_SetItem`.
.. c:function:: Py_ssize_t PyList_Size(PyObject *list)
.. index:: pair: built-in function; len
Return the length of the list object in *list*; this is equivalent to
``len(list)`` on a list object.
.. c:function:: Py_ssize_t PyList_GET_SIZE(PyObject *list)
Similar to :c:func:`PyList_Size`, but without error checking.
.. c:function:: PyObject* PyList_GetItem(PyObject *list, Py_ssize_t index)
Return the object at position *index* in the list pointed to by *list*. The
position must be non-negative; indexing from the end of the list is not
supported. If *index* is out of bounds (<0 or >=len(list)),
return ``NULL`` and set an :exc:`IndexError` exception.
.. c:function:: PyObject* PyList_GET_ITEM(PyObject *list, Py_ssize_t i)
Similar to :c:func:`PyList_GetItem`, but without error checking.
.. c:function:: int PyList_SetItem(PyObject *list, Py_ssize_t index, PyObject *item)
Set the item at index *index* in list to *item*. Return ``0`` on success.
If *index* is out of bounds, return ``-1`` and set an :exc:`IndexError`
exception.
.. note::
This function "steals" a reference to *item* and discards a reference to
an item already in the list at the affected position.
.. c:function:: void PyList_SET_ITEM(PyObject *list, Py_ssize_t i, PyObject *o)
Macro form of :c:func:`PyList_SetItem` without error checking. This is
normally only used to fill in new lists where there is no previous content.
Bounds checking is performed as an assertion if Python is built in
:ref:`debug mode <debug-build>` or :option:`with assertions
<--with-assertions>`.
.. note::
This macro "steals" a reference to *item*, and, unlike
:c:func:`PyList_SetItem`, does *not* discard a reference to any item that
is being replaced; any reference in *list* at position *i* will be
leaked.
.. c:function:: int PyList_Insert(PyObject *list, Py_ssize_t index, PyObject *item)
Insert the item *item* into list *list* in front of index *index*. Return
``0`` if successful; return ``-1`` and set an exception if unsuccessful.
Analogous to ``list.insert(index, item)``.
.. c:function:: int PyList_Append(PyObject *list, PyObject *item)
Append the object *item* at the end of list *list*. Return ``0`` if
successful; return ``-1`` and set an exception if unsuccessful. Analogous
to ``list.append(item)``.
.. c:function:: PyObject* PyList_GetSlice(PyObject *list, Py_ssize_t low, Py_ssize_t high)
Return a list of the objects in *list* containing the objects *between* *low*
and *high*. Return ``NULL`` and set an exception if unsuccessful. Analogous
to ``list[low:high]``. Indexing from the end of the list is not supported.
.. c:function:: int PyList_SetSlice(PyObject *list, Py_ssize_t low, Py_ssize_t high, PyObject *itemlist)
Set the slice of *list* between *low* and *high* to the contents of
*itemlist*. Analogous to ``list[low:high] = itemlist``. The *itemlist* may
be ``NULL``, indicating the assignment of an empty list (slice deletion).
Return ``0`` on success, ``-1`` on failure. Indexing from the end of the
list is not supported.
.. c:function:: int PyList_Sort(PyObject *list)
Sort the items of *list* in place. Return ``0`` on success, ``-1`` on
failure. This is equivalent to ``list.sort()``.
.. c:function:: int PyList_Reverse(PyObject *list)
Reverse the items of *list* in place. Return ``0`` on success, ``-1`` on
failure. This is the equivalent of ``list.reverse()``.
.. c:function:: PyObject* PyList_AsTuple(PyObject *list)
.. index:: pair: built-in function; tuple
Return a new tuple object containing the contents of *list*; equivalent to
``tuple(list)``.
|
