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svn+ssh://pythondev@svn.python.org/python/trunk ........ r74074 | georg.brandl | 2009-07-18 05:03:10 -0400 (Sat, 18 Jul 2009) | 1 line #6513: fix example code: warning categories are classes, not instances. ........ r74077 | georg.brandl | 2009-07-18 05:43:40 -0400 (Sat, 18 Jul 2009) | 1 line #6489: fix an ambiguity in getiterator() documentation. ........ r74111 | benjamin.peterson | 2009-07-20 09:30:10 -0400 (Mon, 20 Jul 2009) | 1 line remove docs for deprecated -p option ........ r74188 | benjamin.peterson | 2009-07-23 10:25:31 -0400 (Thu, 23 Jul 2009) | 1 line use bools ........ r74192 | georg.brandl | 2009-07-24 12:28:38 -0400 (Fri, 24 Jul 2009) | 1 line Fix arg types of et#. ........ r74193 | georg.brandl | 2009-07-24 12:46:38 -0400 (Fri, 24 Jul 2009) | 1 line Dont put "void" in signature for nullary functions. ........ r74200 | georg.brandl | 2009-07-25 09:02:15 -0400 (Sat, 25 Jul 2009) | 1 line #6571: add index entries for more operators. ........ r74252 | georg.brandl | 2009-07-29 12:06:31 -0400 (Wed, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 12:09:17 -0400 (Wed, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74258 | georg.brandl | 2009-07-29 12:57:05 -0400 (Wed, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 13:07:21 -0400 (Wed, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 13:15:20 -0400 (Wed, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 13:50:25 -0400 (Wed, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........
112 lines
3.4 KiB
ReStructuredText
112 lines
3.4 KiB
ReStructuredText
.. highlightlang:: c
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.. _tupleobjects:
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Tuple Objects
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-------------
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.. index:: object: tuple
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.. ctype:: PyTupleObject
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This subtype of :ctype:`PyObject` represents a Python tuple object.
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.. cvar:: PyTypeObject PyTuple_Type
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.. index:: single: TupleType (in module types)
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This instance of :ctype:`PyTypeObject` represents the Python tuple type; it is
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the same object as ``tuple`` and ``types.TupleType`` in the Python layer..
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.. cfunction:: int PyTuple_Check(PyObject *p)
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Return true if *p* is a tuple object or an instance of a subtype of the tuple
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type.
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.. cfunction:: int PyTuple_CheckExact(PyObject *p)
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Return true if *p* is a tuple object, but not an instance of a subtype of the
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tuple type.
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.. cfunction:: PyObject* PyTuple_New(Py_ssize_t len)
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Return a new tuple object of size *len*, or *NULL* on failure.
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.. cfunction:: PyObject* PyTuple_Pack(Py_ssize_t n, ...)
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Return a new tuple object of size *n*, or *NULL* on failure. The tuple values
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are initialized to the subsequent *n* C arguments pointing to Python objects.
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``PyTuple_Pack(2, a, b)`` is equivalent to ``Py_BuildValue("(OO)", a, b)``.
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.. cfunction:: Py_ssize_t PyTuple_Size(PyObject *p)
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Take a pointer to a tuple object, and return the size of that tuple.
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.. cfunction:: Py_ssize_t PyTuple_GET_SIZE(PyObject *p)
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Return the size of the tuple *p*, which must be non-*NULL* and point to a tuple;
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no error checking is performed.
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.. cfunction:: PyObject* PyTuple_GetItem(PyObject *p, Py_ssize_t pos)
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Return the object at position *pos* in the tuple pointed to by *p*. If *pos* is
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out of bounds, return *NULL* and sets an :exc:`IndexError` exception.
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.. cfunction:: PyObject* PyTuple_GET_ITEM(PyObject *p, Py_ssize_t pos)
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Like :cfunc:`PyTuple_GetItem`, but does no checking of its arguments.
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.. cfunction:: PyObject* PyTuple_GetSlice(PyObject *p, Py_ssize_t low, Py_ssize_t high)
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Take a slice of the tuple pointed to by *p* from *low* to *high* and return it
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as a new tuple.
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.. cfunction:: int PyTuple_SetItem(PyObject *p, Py_ssize_t pos, PyObject *o)
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Insert a reference to object *o* at position *pos* of the tuple pointed to by
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*p*. Return ``0`` on success.
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.. note::
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This function "steals" a reference to *o*.
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.. cfunction:: void PyTuple_SET_ITEM(PyObject *p, Py_ssize_t pos, PyObject *o)
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Like :cfunc:`PyTuple_SetItem`, but does no error checking, and should *only* be
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used to fill in brand new tuples.
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.. note::
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This function "steals" a reference to *o*.
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.. cfunction:: int _PyTuple_Resize(PyObject **p, Py_ssize_t newsize)
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Can be used to resize a tuple. *newsize* will be the new length of the tuple.
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Because tuples are *supposed* to be immutable, this should only be used if there
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is only one reference to the object. Do *not* use this if the tuple may already
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be known to some other part of the code. The tuple will always grow or shrink
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at the end. Think of this as destroying the old tuple and creating a new one,
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only more efficiently. Returns ``0`` on success. Client code should never
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assume that the resulting value of ``*p`` will be the same as before calling
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this function. If the object referenced by ``*p`` is replaced, the original
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``*p`` is destroyed. On failure, returns ``-1`` and sets ``*p`` to *NULL*, and
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raises :exc:`MemoryError` or :exc:`SystemError`.
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.. cfunction:: int PyTuple_ClearFreeList()
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Clear the free list. Return the total number of freed items.
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