cpython/Doc/c-api/buffer.rst

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.. highlightlang:: c
.. _bufferobjects:
Buffer Objects
--------------
.. sectionauthor:: Greg Stein <gstein@lyra.org>
.. index::
object: buffer
single: buffer interface
Python objects implemented in C can export a group of functions called the
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
2009-04-29 05:00:05 -03:00
"buffer interface." These functions can be used by an object to expose its
data in a raw, byte-oriented format. Clients of the object can use the buffer
interface to access the object data directly, without needing to copy it
first.
Two examples of objects that support the buffer interface are strings and
arrays. The string object exposes the character contents in the buffer
interface's byte-oriented form. An array can also expose its contents, but it
should be noted that array elements may be multi-byte values.
An example user of the buffer interface is the file object's :meth:`write`
method. Any object that can export a series of bytes through the buffer
interface can be written to a file. There are a number of format codes to
:cfunc:`PyArg_ParseTuple` that operate against an object's buffer interface,
returning data from the target object.
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
2009-04-29 05:00:05 -03:00
Starting from version 1.6, Python has been providing Python-level buffer
objects and a C-level buffer API so that any builtin or used-defined type can
expose its characteristics. Both, however, have been deprecated because of
various shortcomings, and have been officially removed in Python 3.0 in favour
of a new C-level buffer API and a new Python-level object named
:class:`memoryview`.
The new buffer API has been backported to Python 2.6, and the
:class:`memoryview` object has been backported to Python 2.7. It is strongly
advised to use them rather than the old APIs, unless you are blocked from
doing so for compatibility reasons.
The new-style Py_buffer struct
==============================
.. ctype:: Py_buffer
.. cmember:: void *buf
A pointer to the start of the memory for the object.
.. cmember:: Py_ssize_t len
:noindex:
The total length of the memory in bytes.
.. cmember:: int readonly
An indicator of whether the buffer is read only.
.. cmember:: const char *format
:noindex:
A *NULL* terminated string in :mod:`struct` module style syntax giving
the contents of the elements available through the buffer. If this is
*NULL*, ``"B"`` (unsigned bytes) is assumed.
.. cmember:: int ndim
The number of dimensions the memory represents as a multi-dimensional
array. If it is 0, :cdata:`strides` and :cdata:`suboffsets` must be
*NULL*.
.. cmember:: Py_ssize_t *shape
An array of :ctype:`Py_ssize_t`\s the length of :cdata:`ndim` giving the
shape of the memory as a multi-dimensional array. Note that
``((*shape)[0] * ... * (*shape)[ndims-1])*itemsize`` should be equal to
:cdata:`len`.
.. cmember:: Py_ssize_t *strides
An array of :ctype:`Py_ssize_t`\s the length of :cdata:`ndim` giving the
number of bytes to skip to get to a new element in each dimension.
.. cmember:: Py_ssize_t *suboffsets
An array of :ctype:`Py_ssize_t`\s the length of :cdata:`ndim`. If these
suboffset numbers are greater than or equal to 0, then the value stored
along the indicated dimension is a pointer and the suboffset value
dictates how many bytes to add to the pointer after de-referencing. A
suboffset value that it negative indicates that no de-referencing should
occur (striding in a contiguous memory block).
Here is a function that returns a pointer to the element in an N-D array
pointed to by an N-dimesional index when there are both non-NULL strides
and suboffsets::
void *get_item_pointer(int ndim, void *buf, Py_ssize_t *strides,
Py_ssize_t *suboffsets, Py_ssize_t *indices) {
char *pointer = (char*)buf;
int i;
for (i = 0; i < ndim; i++) {
pointer += strides[i] * indices[i];
if (suboffsets[i] >=0 ) {
pointer = *((char**)pointer) + suboffsets[i];
}
}
return (void*)pointer;
}
.. cmember:: Py_ssize_t itemsize
This is a storage for the itemsize (in bytes) of each element of the
shared memory. It is technically un-necessary as it can be obtained
using :cfunc:`PyBuffer_SizeFromFormat`, however an exporter may know
this information without parsing the format string and it is necessary
to know the itemsize for proper interpretation of striding. Therefore,
storing it is more convenient and faster.
.. cmember:: void *internal
This is for use internally by the exporting object. For example, this
might be re-cast as an integer by the exporter and used to store flags
about whether or not the shape, strides, and suboffsets arrays must be
freed when the buffer is released. The consumer should never alter this
value.
Buffer related functions
========================
.. cfunction:: int PyObject_CheckBuffer(PyObject *obj)
Return 1 if *obj* supports the buffer interface otherwise 0.
.. cfunction:: int PyObject_GetBuffer(PyObject *obj, PyObject *view, int flags)
Export *obj* into a :ctype:`Py_buffer`, *view*. These arguments must
never be *NULL*. The *flags* argument is a bit field indicating what
kind of buffer the caller is prepared to deal with and therefore what
kind of buffer the exporter is allowed to return. The buffer interface
allows for complicated memory sharing possibilities, but some caller may
not be able to handle all the complexibity but may want to see if the
exporter will let them take a simpler view to its memory.
Some exporters may not be able to share memory in every possible way and
may need to raise errors to signal to some consumers that something is
just not possible. These errors should be a :exc:`BufferError` unless
there is another error that is actually causing the problem. The
exporter can use flags information to simplify how much of the
:cdata:`Py_buffer` structure is filled in with non-default values and/or
raise an error if the object can't support a simpler view of its memory.
0 is returned on success and -1 on error.
The following table gives possible values to the *flags* arguments.
+------------------------------+---------------------------------------------------+
| Flag | Description |
+==============================+===================================================+
| :cmacro:`PyBUF_SIMPLE` | This is the default flag state. The returned |
| | buffer may or may not have writable memory. The |
| | format of the data will be assumed to be unsigned |
| | bytes. This is a "stand-alone" flag constant. It |
| | never needs to be '|'d to the others. The exporter|
| | will raise an error if it cannot provide such a |
| | contiguous buffer of bytes. |
| | |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_WRITABLE` | The returned buffer must be writable. If it is |
| | not writable, then raise an error. |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_STRIDES` | This implies :cmacro:`PyBUF_ND`. The returned |
| | buffer must provide strides information (i.e. the |
| | strides cannot be NULL). This would be used when |
| | the consumer can handle strided, discontiguous |
| | arrays. Handling strides automatically assumes |
| | you can handle shape. The exporter can raise an |
| | error if a strided representation of the data is |
| | not possible (i.e. without the suboffsets). |
| | |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_ND` | The returned buffer must provide shape |
| | information. The memory will be assumed C-style |
| | contiguous (last dimension varies the |
| | fastest). The exporter may raise an error if it |
| | cannot provide this kind of contiguous buffer. If |
| | this is not given then shape will be *NULL*. |
| | |
| | |
| | |
+------------------------------+---------------------------------------------------+
|:cmacro:`PyBUF_C_CONTIGUOUS` | These flags indicate that the contiguity returned |
|:cmacro:`PyBUF_F_CONTIGUOUS` | buffer must be respectively, C-contiguous (last |
|:cmacro:`PyBUF_ANY_CONTIGUOUS`| dimension varies the fastest), Fortran contiguous |
| | (first dimension varies the fastest) or either |
| | one. All of these flags imply |
| | :cmacro:`PyBUF_STRIDES` and guarantee that the |
| | strides buffer info structure will be filled in |
| | correctly. |
| | |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_INDIRECT` | This flag indicates the returned buffer must have |
| | suboffsets information (which can be NULL if no |
| | suboffsets are needed). This can be used when |
| | the consumer can handle indirect array |
| | referencing implied by these suboffsets. This |
| | implies :cmacro:`PyBUF_STRIDES`. |
| | |
| | |
| | |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_FORMAT` | The returned buffer must have true format |
| | information if this flag is provided. This would |
| | be used when the consumer is going to be checking |
| | for what 'kind' of data is actually stored. An |
| | exporter should always be able to provide this |
| | information if requested. If format is not |
| | explicitly requested then the format must be |
| | returned as *NULL* (which means ``'B'``, or |
| | unsigned bytes) |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_STRIDED` | This is equivalent to ``(PyBUF_STRIDES | |
| | PyBUF_WRITABLE)``. |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_STRIDED_RO` | This is equivalent to ``(PyBUF_STRIDES)``. |
| | |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_RECORDS` | This is equivalent to ``(PyBUF_STRIDES | |
| | PyBUF_FORMAT | PyBUF_WRITABLE)``. |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_RECORDS_RO` | This is equivalent to ``(PyBUF_STRIDES | |
| | PyBUF_FORMAT)``. |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_FULL` | This is equivalent to ``(PyBUF_INDIRECT | |
| | PyBUF_FORMAT | PyBUF_WRITABLE)``. |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_FULL_RO` | This is equivalent to ``(PyBUF_INDIRECT | |
| | PyBUF_FORMAT)``. |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_CONTIG` | This is equivalent to ``(PyBUF_ND | |
| | PyBUF_WRITABLE)``. |
+------------------------------+---------------------------------------------------+
| :cmacro:`PyBUF_CONTIG_RO` | This is equivalent to ``(PyBUF_ND)``. |
| | |
+------------------------------+---------------------------------------------------+
.. cfunction:: void PyBuffer_Release(PyObject *obj, Py_buffer *view)
Release the buffer *view* over *obj*. This shouldd be called when the buffer
is no longer being used as it may free memory from it.
.. cfunction:: Py_ssize_t PyBuffer_SizeFromFormat(const char *)
Return the implied :cdata:`~Py_buffer.itemsize` from the struct-stype
:cdata:`~Py_buffer.format`.
.. cfunction:: int PyObject_CopyToObject(PyObject *obj, void *buf, Py_ssize_t len, char fortran)
Copy *len* bytes of data pointed to by the contiguous chunk of memory
pointed to by *buf* into the buffer exported by obj. The buffer must of
course be writable. Return 0 on success and return -1 and raise an error
on failure. If the object does not have a writable buffer, then an error
is raised. If *fortran* is ``'F'``, then if the object is
multi-dimensional, then the data will be copied into the array in
Fortran-style (first dimension varies the fastest). If *fortran* is
``'C'``, then the data will be copied into the array in C-style (last
dimension varies the fastest). If *fortran* is ``'A'``, then it does not
matter and the copy will be made in whatever way is more efficient.
.. cfunction:: int PyBuffer_IsContiguous(Py_buffer *view, char fortran)
Return 1 if the memory defined by the *view* is C-style (*fortran* is
``'C'``) or Fortran-style (*fortran* is ``'F'``) contiguous or either one
(*fortran* is ``'A'``). Return 0 otherwise.
.. cfunction:: void PyBuffer_FillContiguousStrides(int ndim, Py_ssize_t *shape, Py_ssize_t *strides, Py_ssize_t itemsize, char fortran)
Fill the *strides* array with byte-strides of a contiguous (C-style if
*fortran* is ``'C'`` or Fortran-style if *fortran* is ``'F'`` array of the
given shape with the given number of bytes per element.
.. cfunction:: int PyBuffer_FillInfo(Py_buffer *view, void *buf, Py_ssize_t len, int readonly, int infoflags)
Fill in a buffer-info structure, *view*, correctly for an exporter that can
only share a contiguous chunk of memory of "unsigned bytes" of the given
length. Return 0 on success and -1 (with raising an error) on error.
Old-style buffer objects
========================
.. index:: single: PyBufferProcs
Merged revisions 68133-68134,68141-68142,68145-68146,68148-68149,68159-68162,68166,68171-68174,68179,68195-68196,68210,68214-68215,68217-68222 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r68133 | antoine.pitrou | 2009-01-01 16:38:03 +0100 (Thu, 01 Jan 2009) | 1 line fill in actual issue number in tests ........ r68134 | hirokazu.yamamoto | 2009-01-01 16:45:39 +0100 (Thu, 01 Jan 2009) | 2 lines Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open file with `str' filename on Windows. ........ r68141 | benjamin.peterson | 2009-01-01 17:43:12 +0100 (Thu, 01 Jan 2009) | 1 line fix highlighting ........ r68142 | benjamin.peterson | 2009-01-01 18:29:49 +0100 (Thu, 01 Jan 2009) | 2 lines welcome to 2009, Python! ........ r68145 | amaury.forgeotdarc | 2009-01-02 01:03:54 +0100 (Fri, 02 Jan 2009) | 5 lines #4801 _collections module fails to build on cygwin. _PyObject_GC_TRACK is the macro version of PyObject_GC_Track, and according to documentation it should not be used for extension modules. ........ r68146 | ronald.oussoren | 2009-01-02 11:44:46 +0100 (Fri, 02 Jan 2009) | 2 lines Fix for issue4472: "configure --enable-shared doesn't work on OSX" ........ r68148 | ronald.oussoren | 2009-01-02 11:48:31 +0100 (Fri, 02 Jan 2009) | 2 lines Forgot to add a NEWS item in my previous checkin ........ r68149 | ronald.oussoren | 2009-01-02 11:50:48 +0100 (Fri, 02 Jan 2009) | 2 lines Fix for issue4780 ........ r68159 | ronald.oussoren | 2009-01-02 15:48:17 +0100 (Fri, 02 Jan 2009) | 2 lines Fix for issue 1627952 ........ r68160 | ronald.oussoren | 2009-01-02 15:52:09 +0100 (Fri, 02 Jan 2009) | 2 lines Fix for issue r1737832 ........ r68161 | ronald.oussoren | 2009-01-02 16:00:05 +0100 (Fri, 02 Jan 2009) | 3 lines Fix for issue 1149804 ........ r68162 | ronald.oussoren | 2009-01-02 16:06:00 +0100 (Fri, 02 Jan 2009) | 3 lines Fix for issue 4472 is incompatible with Cygwin, this patch should fix that. ........ r68166 | benjamin.peterson | 2009-01-02 19:26:23 +0100 (Fri, 02 Jan 2009) | 1 line document PyMemberDef ........ r68171 | georg.brandl | 2009-01-02 21:25:14 +0100 (Fri, 02 Jan 2009) | 3 lines #4811: fix markup glitches (mostly remains of the conversion), found by Gabriel Genellina. ........ r68172 | martin.v.loewis | 2009-01-02 21:32:55 +0100 (Fri, 02 Jan 2009) | 2 lines Issue #4075: Use OutputDebugStringW in Py_FatalError. ........ r68173 | martin.v.loewis | 2009-01-02 21:40:14 +0100 (Fri, 02 Jan 2009) | 2 lines Issue #4051: Prevent conflict of UNICODE macros in cPickle. ........ r68174 | benjamin.peterson | 2009-01-02 21:47:27 +0100 (Fri, 02 Jan 2009) | 1 line fix compilation on non-Windows platforms ........ r68179 | raymond.hettinger | 2009-01-02 22:26:45 +0100 (Fri, 02 Jan 2009) | 1 line Issue #4615. Document how to use itertools for de-duping. ........ r68195 | georg.brandl | 2009-01-03 14:45:15 +0100 (Sat, 03 Jan 2009) | 2 lines Remove useless string literal. ........ r68196 | georg.brandl | 2009-01-03 15:29:53 +0100 (Sat, 03 Jan 2009) | 2 lines Fix indentation. ........ r68210 | georg.brandl | 2009-01-03 20:10:12 +0100 (Sat, 03 Jan 2009) | 2 lines Set eol-style correctly for mp_distributing.py. ........ r68214 | georg.brandl | 2009-01-03 20:44:48 +0100 (Sat, 03 Jan 2009) | 2 lines Make indentation consistent. ........ r68215 | georg.brandl | 2009-01-03 21:15:14 +0100 (Sat, 03 Jan 2009) | 2 lines Fix role name. ........ r68217 | georg.brandl | 2009-01-03 21:30:15 +0100 (Sat, 03 Jan 2009) | 2 lines Add rstlint, a little tool to find subtle markup problems and inconsistencies in the Doc sources. ........ r68218 | georg.brandl | 2009-01-03 21:38:59 +0100 (Sat, 03 Jan 2009) | 2 lines Recognize usage of the default role. ........ r68219 | georg.brandl | 2009-01-03 21:47:01 +0100 (Sat, 03 Jan 2009) | 2 lines Fix uses of the default role. ........ r68220 | georg.brandl | 2009-01-03 21:55:06 +0100 (Sat, 03 Jan 2009) | 2 lines Remove trailing whitespace. ........ r68221 | georg.brandl | 2009-01-03 22:04:55 +0100 (Sat, 03 Jan 2009) | 2 lines Remove tabs from the documentation. ........ r68222 | georg.brandl | 2009-01-03 22:11:58 +0100 (Sat, 03 Jan 2009) | 2 lines Disable the line length checker by default. ........
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More information on the buffer interface is provided in the section
:ref:`buffer-structs`, under the description for :ctype:`PyBufferProcs`.
A "buffer object" is defined in the :file:`bufferobject.h` header (included by
:file:`Python.h`). These objects look very similar to string objects at the
Python programming level: they support slicing, indexing, concatenation, and
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
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some other standard string operations. However, their data can come from one
of two sources: from a block of memory, or from another object which exports
the buffer interface.
Buffer objects are useful as a way to expose the data from another object's
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
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buffer interface to the Python programmer. They can also be used as a
zero-copy slicing mechanism. Using their ability to reference a block of
memory, it is possible to expose any data to the Python programmer quite
easily. The memory could be a large, constant array in a C extension, it could
be a raw block of memory for manipulation before passing to an operating
system library, or it could be used to pass around structured data in its
native, in-memory format.
.. ctype:: PyBufferObject
This subtype of :ctype:`PyObject` represents a buffer object.
.. cvar:: PyTypeObject PyBuffer_Type
.. index:: single: BufferType (in module types)
The instance of :ctype:`PyTypeObject` which represents the Python buffer type;
it is the same object as ``buffer`` and ``types.BufferType`` in the Python
layer. .
.. cvar:: int Py_END_OF_BUFFER
This constant may be passed as the *size* parameter to
:cfunc:`PyBuffer_FromObject` or :cfunc:`PyBuffer_FromReadWriteObject`. It
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
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indicates that the new :ctype:`PyBufferObject` should refer to *base*
object from the specified *offset* to the end of its exported buffer.
Using this enables the caller to avoid querying the *base* object for its
length.
.. cfunction:: int PyBuffer_Check(PyObject *p)
Return true if the argument has type :cdata:`PyBuffer_Type`.
.. cfunction:: PyObject* PyBuffer_FromObject(PyObject *base, Py_ssize_t offset, Py_ssize_t size)
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
2009-04-29 05:00:05 -03:00
Return a new read-only buffer object. This raises :exc:`TypeError` if
*base* doesn't support the read-only buffer protocol or doesn't provide
exactly one buffer segment, or it raises :exc:`ValueError` if *offset* is
less than zero. The buffer will hold a reference to the *base* object, and
the buffer's contents will refer to the *base* object's buffer interface,
starting as position *offset* and extending for *size* bytes. If *size* is
:const:`Py_END_OF_BUFFER`, then the new buffer's contents extend to the
length of the *base* object's exported buffer data.
.. versionchanged:: 2.5
This function used an :ctype:`int` type for *offset* and *size*. This
might require changes in your code for properly supporting 64-bit
systems.
.. cfunction:: PyObject* PyBuffer_FromReadWriteObject(PyObject *base, Py_ssize_t offset, Py_ssize_t size)
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
2009-04-29 05:00:05 -03:00
Return a new writable buffer object. Parameters and exceptions are similar
to those for :cfunc:`PyBuffer_FromObject`. If the *base* object does not
export the writeable buffer protocol, then :exc:`TypeError` is raised.
.. versionchanged:: 2.5
This function used an :ctype:`int` type for *offset* and *size*. This
might require changes in your code for properly supporting 64-bit
systems.
.. cfunction:: PyObject* PyBuffer_FromMemory(void *ptr, Py_ssize_t size)
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
2009-04-29 05:00:05 -03:00
Return a new read-only buffer object that reads from a specified location
in memory, with a specified size. The caller is responsible for ensuring
that the memory buffer, passed in as *ptr*, is not deallocated while the
returned buffer object exists. Raises :exc:`ValueError` if *size* is less
than zero. Note that :const:`Py_END_OF_BUFFER` may *not* be passed for the
*size* parameter; :exc:`ValueError` will be raised in that case.
.. versionchanged:: 2.5
This function used an :ctype:`int` type for *size*. This might require
changes in your code for properly supporting 64-bit systems.
.. cfunction:: PyObject* PyBuffer_FromReadWriteMemory(void *ptr, Py_ssize_t size)
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
2009-04-29 05:00:05 -03:00
Similar to :cfunc:`PyBuffer_FromMemory`, but the returned buffer is
writable.
.. versionchanged:: 2.5
This function used an :ctype:`int` type for *size*. This might require
changes in your code for properly supporting 64-bit systems.
.. cfunction:: PyObject* PyBuffer_New(Py_ssize_t size)
Return a new writable buffer object that maintains its own memory buffer of
Merged revisions 71873-71874,71882,71890,71893,71898-71900,71910,71914-71923,71925-71929,71931-71934,71937 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r71873 | jeroen.ruigrok | 2009-04-25 13:15:06 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to expanding. ........ r71874 | jeroen.ruigrok | 2009-04-25 13:59:09 +0200 (za, 25 apr 2009) | 2 lines First attempt to document PyObject_HEAD_INIT and PyVarObject_HEAD_INIT. ........ r71882 | jeroen.ruigrok | 2009-04-25 14:49:10 +0200 (za, 25 apr 2009) | 3 lines Issue #4239: adjust email examples not to use connect() and terminate with quit() and not close(). ........ r71890 | jeroen.ruigrok | 2009-04-25 15:07:40 +0200 (za, 25 apr 2009) | 3 lines Rewrite a sentence to be more in line with the rest of the documentation with regard to person and audience. ........ r71893 | jeroen.ruigrok | 2009-04-25 15:58:58 +0200 (za, 25 apr 2009) | 2 lines Reformat file prior to editing. ........ r71898 | jeroen.ruigrok | 2009-04-25 16:24:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71899 | jeroen.ruigrok | 2009-04-25 16:27:00 +0200 (za, 25 apr 2009) | 3 lines The type for ppos has been Py_ssize_t since 2.5, reflect this in the documentation. ........ r71900 | jeroen.ruigrok | 2009-04-25 16:28:02 +0200 (za, 25 apr 2009) | 2 lines Reformat paragraph. ........ r71910 | jeroen.ruigrok | 2009-04-25 19:59:03 +0200 (za, 25 apr 2009) | 4 lines Issue #4129: Belatedly document which C API functions had their argument(s) or return type changed from int or int * to Py_ssize_t or Py_ssize_t * as this might cause problems on 64-bit platforms. ........ r71914 | jeroen.ruigrok | 2009-04-25 20:31:20 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71915 | jeroen.ruigrok | 2009-04-25 20:46:03 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Document more int -> Py_ssize_t changes. ........ r71916 | jeroen.ruigrok | 2009-04-25 20:53:48 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71917 | jeroen.ruigrok | 2009-04-25 20:57:32 +0200 (za, 25 apr 2009) | 2 lines Reference to an int type, whereas it's a Py_ssize_t as the synopsis states. ........ r71918 | jeroen.ruigrok | 2009-04-25 21:04:15 +0200 (za, 25 apr 2009) | 2 lines Since I edited this file, reformat for future edits. ........ r71919 | jeroen.ruigrok | 2009-04-25 21:10:52 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71920 | jeroen.ruigrok | 2009-04-25 21:44:55 +0200 (za, 25 apr 2009) | 5 lines Issue #4129: More documentation pointers about int -> Py_ssize_t. Also fix up the documentation for PyObject_GC_Resize(). It seems that since it first got documented, the documentation was actually for _PyObject_GC_Resize(). ........ r71921 | jeroen.ruigrok | 2009-04-25 21:46:19 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Documentation notes for int -> Py_ssize_t changes. ........ r71922 | jeroen.ruigrok | 2009-04-25 21:49:05 +0200 (za, 25 apr 2009) | 2 lines Reformat, since I've been busy here anyway. ........ r71923 | jeroen.ruigrok | 2009-04-25 21:54:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: Add a versionchanged notice for a few forgotten entries. ........ r71925 | jeroen.ruigrok | 2009-04-25 22:37:39 +0200 (za, 25 apr 2009) | 2 lines Since it's a macro, actually refer to it as such instead of function. ........ r71926 | jeroen.ruigrok | 2009-04-25 22:40:10 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71927 | jeroen.ruigrok | 2009-04-25 22:41:40 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71928 | jeroen.ruigrok | 2009-04-25 22:43:30 +0200 (za, 25 apr 2009) | 2 lines Reformat prior to editing. ........ r71929 | jeroen.ruigrok | 2009-04-25 22:44:58 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71931 | jeroen.ruigrok | 2009-04-25 22:50:27 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: int -> Py_ssize_t documentation. ........ r71932 | jeroen.ruigrok | 2009-04-25 22:55:39 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71933 | jeroen.ruigrok | 2009-04-25 22:58:35 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: more int -> Py_ssize_t documentation. ........ r71934 | jeroen.ruigrok | 2009-04-25 23:02:34 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: field changed from int to Py_ssize_t. ........ r71937 | jeroen.ruigrok | 2009-04-25 23:16:05 +0200 (za, 25 apr 2009) | 2 lines Issue #4129: document int -> Py_ssize_t changes. ........
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*size* bytes. :exc:`ValueError` is returned if *size* is not zero or
positive. Note that the memory buffer (as returned by
:cfunc:`PyObject_AsWriteBuffer`) is not specifically aligned.
.. versionchanged:: 2.5
This function used an :ctype:`int` type for *size*. This might require
changes in your code for properly supporting 64-bit systems.