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# SOME DESCRIPTIVE TITLE.
# Copyright (C) 2001-2017, Python Software Foundation
# This file is distributed under the same license as the Python package.
# FIRST AUTHOR <EMAIL@ADDRESS>, 2017.
#
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: Python 3.6\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2018-05-26 11:10+0900\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=utf-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Generated-By: Babel 2.5.1\n"
#: ../Doc/c-api/typeobj.rst:6
msgid "Type Objects"
msgstr ""
#: ../Doc/c-api/typeobj.rst:8
msgid ""
"Perhaps one of the most important structures of the Python object system "
"is the structure that defines a new type: the :c:type:`PyTypeObject` "
"structure. Type objects can be handled using any of the "
":c:func:`PyObject_\\*` or :c:func:`PyType_\\*` functions, but do not "
"offer much that's interesting to most Python applications. These objects "
"are fundamental to how objects behave, so they are very important to the "
"interpreter itself and to any extension module that implements new types."
msgstr ""
#: ../Doc/c-api/typeobj.rst:16
msgid ""
"Type objects are fairly large compared to most of the standard types. The"
" reason for the size is that each type object stores a large number of "
"values, mostly C function pointers, each of which implements a small part"
" of the type's functionality. The fields of the type object are examined"
" in detail in this section. The fields will be described in the order in"
" which they occur in the structure."
msgstr ""
#: ../Doc/c-api/typeobj.rst:23
msgid ""
"Typedefs: unaryfunc, binaryfunc, ternaryfunc, inquiry, intargfunc, "
"intintargfunc, intobjargproc, intintobjargproc, objobjargproc, "
"destructor, freefunc, printfunc, getattrfunc, getattrofunc, setattrfunc, "
"setattrofunc, reprfunc, hashfunc"
msgstr ""
#: ../Doc/c-api/typeobj.rst:28
msgid ""
"The structure definition for :c:type:`PyTypeObject` can be found in "
":file:`Include/object.h`. For convenience of reference, this repeats the"
" definition found there:"
msgstr ""
#: ../Doc/c-api/typeobj.rst:35
msgid ""
"The type object structure extends the :c:type:`PyVarObject` structure. "
"The :attr:`ob_size` field is used for dynamic types (created by "
":func:`type_new`, usually called from a class statement). Note that "
":c:data:`PyType_Type` (the metatype) initializes "
":c:member:`~PyTypeObject.tp_itemsize`, which means that its instances "
"(i.e. type objects) *must* have the :attr:`ob_size` field."
msgstr ""
#: ../Doc/c-api/typeobj.rst:45
msgid ""
"These fields are only present when the macro ``Py_TRACE_REFS`` is "
"defined. Their initialization to *NULL* is taken care of by the "
"``PyObject_HEAD_INIT`` macro. For statically allocated objects, these "
"fields always remain *NULL*. For dynamically allocated objects, these two"
" fields are used to link the object into a doubly-linked list of *all* "
"live objects on the heap. This could be used for various debugging "
"purposes; currently the only use is to print the objects that are still "
"alive at the end of a run when the environment variable "
":envvar:`PYTHONDUMPREFS` is set."
msgstr ""
#: ../Doc/c-api/typeobj.rst:54
msgid "These fields are not inherited by subtypes."
msgstr ""
#: ../Doc/c-api/typeobj.rst:59
msgid ""
"This is the type object's reference count, initialized to ``1`` by the "
"``PyObject_HEAD_INIT`` macro. Note that for statically allocated type "
"objects, the type's instances (objects whose :attr:`ob_type` points back "
"to the type) do *not* count as references. But for dynamically allocated"
" type objects, the instances *do* count as references."
msgstr ""
#: ../Doc/c-api/typeobj.rst:65 ../Doc/c-api/typeobj.rst:94
#: ../Doc/c-api/typeobj.rst:122
msgid "This field is not inherited by subtypes."
msgstr ""
#: ../Doc/c-api/typeobj.rst:70
msgid ""
"This is the type's type, in other words its metatype. It is initialized "
"by the argument to the ``PyObject_HEAD_INIT`` macro, and its value should"
" normally be ``&PyType_Type``. However, for dynamically loadable "
"extension modules that must be usable on Windows (at least), the compiler"
" complains that this is not a valid initializer. Therefore, the "
"convention is to pass *NULL* to the ``PyObject_HEAD_INIT`` macro and to "
"initialize this field explicitly at the start of the module's "
"initialization function, before doing anything else. This is typically "
"done like this::"
msgstr ""
#: ../Doc/c-api/typeobj.rst:81
msgid ""
"This should be done before any instances of the type are created. "
":c:func:`PyType_Ready` checks if :attr:`ob_type` is *NULL*, and if so, "
"initializes it to the :attr:`ob_type` field of the base class. "
":c:func:`PyType_Ready` will not change this field if it is non-zero."
msgstr ""
#: ../Doc/c-api/typeobj.rst:86 ../Doc/c-api/typeobj.rst:188
#: ../Doc/c-api/typeobj.rst:255 ../Doc/c-api/typeobj.rst:322
#: ../Doc/c-api/typeobj.rst:340 ../Doc/c-api/typeobj.rst:666
#: ../Doc/c-api/typeobj.rst:683 ../Doc/c-api/typeobj.rst:763
#: ../Doc/c-api/typeobj.rst:858 ../Doc/c-api/typeobj.rst:951
#: ../Doc/c-api/typeobj.rst:1006
msgid "This field is inherited by subtypes."
msgstr ""
#: ../Doc/c-api/typeobj.rst:91
msgid ""
"For statically allocated type objects, this should be initialized to "
"zero. For dynamically allocated type objects, this field has a special "
"internal meaning."
msgstr ""
#: ../Doc/c-api/typeobj.rst:99
msgid ""
"Pointer to a NUL-terminated string containing the name of the type. For "
"types that are accessible as module globals, the string should be the "
"full module name, followed by a dot, followed by the type name; for "
"built-in types, it should be just the type name. If the module is a "
"submodule of a package, the full package name is part of the full module "
"name. For example, a type named :class:`T` defined in module :mod:`M` in"
" subpackage :mod:`Q` in package :mod:`P` should have the "
":c:member:`~PyTypeObject.tp_name` initializer ``\"P.Q.M.T\"``."
msgstr ""
#: ../Doc/c-api/typeobj.rst:107
msgid ""
"For dynamically allocated type objects, this should just be the type "
"name, and the module name explicitly stored in the type dict as the value"
" for key ``'__module__'``."
msgstr ""
#: ../Doc/c-api/typeobj.rst:111
msgid ""
"For statically allocated type objects, the tp_name field should contain a"
" dot. Everything before the last dot is made accessible as the "
":attr:`__module__` attribute, and everything after the last dot is made "
"accessible as the :attr:`~definition.__name__` attribute."
msgstr ""
#: ../Doc/c-api/typeobj.rst:116
msgid ""
"If no dot is present, the entire :c:member:`~PyTypeObject.tp_name` field "
"is made accessible as the :attr:`~definition.__name__` attribute, and the"
" :attr:`__module__` attribute is undefined (unless explicitly set in the "
"dictionary, as explained above). This means your type will be impossible"
" to pickle. Additionally, it will not be listed in module documentations"
" created with pydoc."
msgstr ""
#: ../Doc/c-api/typeobj.rst:128
msgid "These fields allow calculating the size in bytes of instances of the type."
msgstr ""
#: ../Doc/c-api/typeobj.rst:130
msgid ""
"There are two kinds of types: types with fixed-length instances have a "
"zero :c:member:`~PyTypeObject.tp_itemsize` field, types with variable-"
"length instances have a non-zero :c:member:`~PyTypeObject.tp_itemsize` "
"field. For a type with fixed-length instances, all instances have the "
"same size, given in :c:member:`~PyTypeObject.tp_basicsize`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:135
msgid ""
"For a type with variable-length instances, the instances must have an "
":attr:`ob_size` field, and the instance size is "
":c:member:`~PyTypeObject.tp_basicsize` plus N times "
":c:member:`~PyTypeObject.tp_itemsize`, where N is the \"length\" of the "
"object. The value of N is typically stored in the instance's "
":attr:`ob_size` field. There are exceptions: for example, ints use a "
"negative :attr:`ob_size` to indicate a negative number, and N is "
"``abs(ob_size)`` there. Also, the presence of an :attr:`ob_size` field "
"in the instance layout doesn't mean that the instance structure is "
"variable-length (for example, the structure for the list type has fixed-"
"length instances, yet those instances have a meaningful :attr:`ob_size` "
"field)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:146
msgid ""
"The basic size includes the fields in the instance declared by the macro "
":c:macro:`PyObject_HEAD` or :c:macro:`PyObject_VAR_HEAD` (whichever is "
"used to declare the instance struct) and this in turn includes the "
":attr:`_ob_prev` and :attr:`_ob_next` fields if they are present. This "
"means that the only correct way to get an initializer for the "
":c:member:`~PyTypeObject.tp_basicsize` is to use the ``sizeof`` operator "
"on the struct used to declare the instance layout. The basic size does "
"not include the GC header size."
msgstr ""
#: ../Doc/c-api/typeobj.rst:154
msgid ""
"These fields are inherited separately by subtypes. If the base type has "
"a non-zero :c:member:`~PyTypeObject.tp_itemsize`, it is generally not "
"safe to set :c:member:`~PyTypeObject.tp_itemsize` to a different non-zero"
" value in a subtype (though this depends on the implementation of the "
"base type)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:159
msgid ""
"A note about alignment: if the variable items require a particular "
"alignment, this should be taken care of by the value of "
":c:member:`~PyTypeObject.tp_basicsize`. Example: suppose a type "
"implements an array of ``double``. :c:member:`~PyTypeObject.tp_itemsize` "
"is ``sizeof(double)``. It is the programmer's responsibility that "
":c:member:`~PyTypeObject.tp_basicsize` is a multiple of "
"``sizeof(double)`` (assuming this is the alignment requirement for "
"``double``)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:169
msgid ""
"A pointer to the instance destructor function. This function must be "
"defined unless the type guarantees that its instances will never be "
"deallocated (as is the case for the singletons ``None`` and "
"``Ellipsis``)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:173
msgid ""
"The destructor function is called by the :c:func:`Py_DECREF` and "
":c:func:`Py_XDECREF` macros when the new reference count is zero. At "
"this point, the instance is still in existence, but there are no "
"references to it. The destructor function should free all references "
"which the instance owns, free all memory buffers owned by the instance "
"(using the freeing function corresponding to the allocation function used"
" to allocate the buffer), and finally (as its last action) call the "
"type's :c:member:`~PyTypeObject.tp_free` function. If the type is not "
"subtypable (doesn't have the :const:`Py_TPFLAGS_BASETYPE` flag bit set), "
"it is permissible to call the object deallocator directly instead of via "
":c:member:`~PyTypeObject.tp_free`. The object deallocator should be the "
"one used to allocate the instance; this is normally "
":c:func:`PyObject_Del` if the instance was allocated using "
":c:func:`PyObject_New` or :c:func:`PyObject_VarNew`, or "
":c:func:`PyObject_GC_Del` if the instance was allocated using "
":c:func:`PyObject_GC_New` or :c:func:`PyObject_GC_NewVar`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:193
msgid "Reserved slot, formerly used for print formatting in Python 2.x."
msgstr ""
#: ../Doc/c-api/typeobj.rst:198
msgid "An optional pointer to the get-attribute-string function."
msgstr ""
#: ../Doc/c-api/typeobj.rst:200
msgid ""
"This field is deprecated. When it is defined, it should point to a "
"function that acts the same as the :c:member:`~PyTypeObject.tp_getattro` "
"function, but taking a C string instead of a Python string object to give"
" the attribute name. The signature is ::"
msgstr ""
#: ../Doc/c-api/typeobj.rst:206
msgid ""
"This field is inherited by subtypes together with "
":c:member:`~PyTypeObject.tp_getattro`: a subtype inherits both "
":c:member:`~PyTypeObject.tp_getattr` and "
":c:member:`~PyTypeObject.tp_getattro` from its base type when the "
"subtype's :c:member:`~PyTypeObject.tp_getattr` and "
":c:member:`~PyTypeObject.tp_getattro` are both *NULL*."
msgstr ""
#: ../Doc/c-api/typeobj.rst:213 ../Doc/c-api/typeobj.rst:358
msgid "An optional pointer to the function for setting and deleting attributes."
msgstr ""
#: ../Doc/c-api/typeobj.rst:215
msgid ""
"This field is deprecated. When it is defined, it should point to a "
"function that acts the same as the :c:member:`~PyTypeObject.tp_setattro` "
"function, but taking a C string instead of a Python string object to give"
" the attribute name. The signature is ::"
msgstr ""
#: ../Doc/c-api/typeobj.rst:221
msgid ""
"The *v* argument is set to *NULL* to delete the attribute. This field is "
"inherited by subtypes together with "
":c:member:`~PyTypeObject.tp_setattro`: a subtype inherits both "
":c:member:`~PyTypeObject.tp_setattr` and "
":c:member:`~PyTypeObject.tp_setattro` from its base type when the "
"subtype's :c:member:`~PyTypeObject.tp_setattr` and "
":c:member:`~PyTypeObject.tp_setattro` are both *NULL*."
msgstr ""
#: ../Doc/c-api/typeobj.rst:229
msgid ""
"Pointer to an additional structure that contains fields relevant only to "
"objects which implement :term:`awaitable` and :term:`asynchronous "
"iterator` protocols at the C-level. See :ref:`async-structs` for "
"details."
msgstr ""
#: ../Doc/c-api/typeobj.rst:233
msgid "Formerly known as ``tp_compare`` and ``tp_reserved``."
msgstr ""
#: ../Doc/c-api/typeobj.rst:241
msgid ""
"An optional pointer to a function that implements the built-in function "
":func:`repr`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:244
msgid ""
"The signature is the same as for :c:func:`PyObject_Repr`; it must return "
"a string or a Unicode object. Ideally, this function should return a "
"string that, when passed to :func:`eval`, given a suitable environment, "
"returns an object with the same value. If this is not feasible, it "
"should return a string starting with ``'<'`` and ending with ``'>'`` from"
" which both the type and the value of the object can be deduced."
msgstr ""
#: ../Doc/c-api/typeobj.rst:251
#, python-format
msgid ""
"When this field is not set, a string of the form ``<%s object at %p>`` is"
" returned, where ``%s`` is replaced by the type name, and ``%p`` by the "
"object's memory address."
msgstr ""
#: ../Doc/c-api/typeobj.rst:259
msgid ""
"Pointer to an additional structure that contains fields relevant only to "
"objects which implement the number protocol. These fields are documented"
" in :ref:`number-structs`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:263
msgid ""
"The :c:member:`~PyTypeObject.tp_as_number` field is not inherited, but "
"the contained fields are inherited individually."
msgstr ""
#: ../Doc/c-api/typeobj.rst:269
msgid ""
"Pointer to an additional structure that contains fields relevant only to "
"objects which implement the sequence protocol. These fields are "
"documented in :ref:`sequence-structs`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:273
msgid ""
"The :c:member:`~PyTypeObject.tp_as_sequence` field is not inherited, but "
"the contained fields are inherited individually."
msgstr ""
#: ../Doc/c-api/typeobj.rst:279
msgid ""
"Pointer to an additional structure that contains fields relevant only to "
"objects which implement the mapping protocol. These fields are "
"documented in :ref:`mapping-structs`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:283
msgid ""
"The :c:member:`~PyTypeObject.tp_as_mapping` field is not inherited, but "
"the contained fields are inherited individually."
msgstr ""
#: ../Doc/c-api/typeobj.rst:291
msgid ""
"An optional pointer to a function that implements the built-in function "
":func:`hash`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:294
msgid ""
"The signature is the same as for :c:func:`PyObject_Hash`; it must return "
"a value of the type Py_hash_t. The value ``-1`` should not be returned "
"as a normal return value; when an error occurs during the computation of "
"the hash value, the function should set an exception and return ``-1``."
msgstr ""
#: ../Doc/c-api/typeobj.rst:299
msgid ""
"This field can be set explicitly to :c:func:`PyObject_HashNotImplemented`"
" to block inheritance of the hash method from a parent type. This is "
"interpreted as the equivalent of ``__hash__ = None`` at the Python level,"
" causing ``isinstance(o, collections.Hashable)`` to correctly return "
"``False``. Note that the converse is also true - setting ``__hash__ = "
"None`` on a class at the Python level will result in the ``tp_hash`` slot"
" being set to :c:func:`PyObject_HashNotImplemented`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:307
msgid ""
"When this field is not set, an attempt to take the hash of the object "
"raises :exc:`TypeError`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:310
msgid ""
"This field is inherited by subtypes together with "
":c:member:`~PyTypeObject.tp_richcompare`: a subtype inherits both of "
":c:member:`~PyTypeObject.tp_richcompare` and "
":c:member:`~PyTypeObject.tp_hash`, when the subtype's "
":c:member:`~PyTypeObject.tp_richcompare` and "
":c:member:`~PyTypeObject.tp_hash` are both *NULL*."
msgstr ""
#: ../Doc/c-api/typeobj.rst:318
msgid ""
"An optional pointer to a function that implements calling the object. "
"This should be *NULL* if the object is not callable. The signature is "
"the same as for :c:func:`PyObject_Call`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:327
msgid ""
"An optional pointer to a function that implements the built-in operation "
":func:`str`. (Note that :class:`str` is a type now, and :func:`str` "
"calls the constructor for that type. This constructor calls "
":c:func:`PyObject_Str` to do the actual work, and :c:func:`PyObject_Str` "
"will call this handler.)"
msgstr ""
#: ../Doc/c-api/typeobj.rst:332
msgid ""
"The signature is the same as for :c:func:`PyObject_Str`; it must return a"
" string or a Unicode object. This function should return a \"friendly\" "
"string representation of the object, as this is the representation that "
"will be used, among other things, by the :func:`print` function."
msgstr ""
#: ../Doc/c-api/typeobj.rst:337
msgid ""
"When this field is not set, :c:func:`PyObject_Repr` is called to return a"
" string representation."
msgstr ""
#: ../Doc/c-api/typeobj.rst:345
msgid "An optional pointer to the get-attribute function."
msgstr ""
#: ../Doc/c-api/typeobj.rst:347
msgid ""
"The signature is the same as for :c:func:`PyObject_GetAttr`. It is "
"usually convenient to set this field to "
":c:func:`PyObject_GenericGetAttr`, which implements the normal way of "
"looking for object attributes."
msgstr ""
#: ../Doc/c-api/typeobj.rst:351
msgid ""
"This field is inherited by subtypes together with "
":c:member:`~PyTypeObject.tp_getattr`: a subtype inherits both "
":c:member:`~PyTypeObject.tp_getattr` and "
":c:member:`~PyTypeObject.tp_getattro` from its base type when the "
"subtype's :c:member:`~PyTypeObject.tp_getattr` and "
":c:member:`~PyTypeObject.tp_getattro` are both *NULL*."
msgstr ""
#: ../Doc/c-api/typeobj.rst:360
msgid ""
"The signature is the same as for :c:func:`PyObject_SetAttr`, but setting "
"*v* to *NULL* to delete an attribute must be supported. It is usually "
"convenient to set this field to :c:func:`PyObject_GenericSetAttr`, which "
"implements the normal way of setting object attributes."
msgstr ""
#: ../Doc/c-api/typeobj.rst:365
msgid ""
"This field is inherited by subtypes together with "
":c:member:`~PyTypeObject.tp_setattr`: a subtype inherits both "
":c:member:`~PyTypeObject.tp_setattr` and "
":c:member:`~PyTypeObject.tp_setattro` from its base type when the "
"subtype's :c:member:`~PyTypeObject.tp_setattr` and "
":c:member:`~PyTypeObject.tp_setattro` are both *NULL*."
msgstr ""
#: ../Doc/c-api/typeobj.rst:372
msgid ""
"Pointer to an additional structure that contains fields relevant only to "
"objects which implement the buffer interface. These fields are "
"documented in :ref:`buffer-structs`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:376
msgid ""
"The :c:member:`~PyTypeObject.tp_as_buffer` field is not inherited, but "
"the contained fields are inherited individually."
msgstr ""
#: ../Doc/c-api/typeobj.rst:382
msgid ""
"This field is a bit mask of various flags. Some flags indicate variant "
"semantics for certain situations; others are used to indicate that "
"certain fields in the type object (or in the extension structures "
"referenced via :c:member:`~PyTypeObject.tp_as_number`, "
":c:member:`~PyTypeObject.tp_as_sequence`, "
":c:member:`~PyTypeObject.tp_as_mapping`, and "
":c:member:`~PyTypeObject.tp_as_buffer`) that were historically not always"
" present are valid; if such a flag bit is clear, the type fields it "
"guards must not be accessed and must be considered to have a zero or "
"*NULL* value instead."
msgstr ""
#: ../Doc/c-api/typeobj.rst:390
msgid ""
"Inheritance of this field is complicated. Most flag bits are inherited "
"individually, i.e. if the base type has a flag bit set, the subtype "
"inherits this flag bit. The flag bits that pertain to extension "
"structures are strictly inherited if the extension structure is "
"inherited, i.e. the base type's value of the flag bit is copied into the "
"subtype together with a pointer to the extension structure. The "
":const:`Py_TPFLAGS_HAVE_GC` flag bit is inherited together with the "
":c:member:`~PyTypeObject.tp_traverse` and "
":c:member:`~PyTypeObject.tp_clear` fields, i.e. if the "
":const:`Py_TPFLAGS_HAVE_GC` flag bit is clear in the subtype and the "
":c:member:`~PyTypeObject.tp_traverse` and "
":c:member:`~PyTypeObject.tp_clear` fields in the subtype exist and have "
"*NULL* values."
msgstr ""
#: ../Doc/c-api/typeobj.rst:401
msgid ""
"The following bit masks are currently defined; these can be ORed together"
" using the ``|`` operator to form the value of the "
":c:member:`~PyTypeObject.tp_flags` field. The macro "
":c:func:`PyType_HasFeature` takes a type and a flags value, *tp* and *f*,"
" and checks whether ``tp->tp_flags & f`` is non-zero."
msgstr ""
#: ../Doc/c-api/typeobj.rst:409
msgid ""
"This bit is set when the type object itself is allocated on the heap. In"
" this case, the :attr:`ob_type` field of its instances is considered a "
"reference to the type, and the type object is INCREF'ed when a new "
"instance is created, and DECREF'ed when an instance is destroyed (this "
"does not apply to instances of subtypes; only the type referenced by the "
"instance's ob_type gets INCREF'ed or DECREF'ed)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:419
msgid ""
"This bit is set when the type can be used as the base type of another "
"type. If this bit is clear, the type cannot be subtyped (similar to a "
"\"final\" class in Java)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:426
msgid ""
"This bit is set when the type object has been fully initialized by "
":c:func:`PyType_Ready`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:432
msgid ""
"This bit is set while :c:func:`PyType_Ready` is in the process of "
"initializing the type object."
msgstr ""
#: ../Doc/c-api/typeobj.rst:438
msgid ""
"This bit is set when the object supports garbage collection. If this bit"
" is set, instances must be created using :c:func:`PyObject_GC_New` and "
"destroyed using :c:func:`PyObject_GC_Del`. More information in section "
":ref:`supporting-cycle-detection`. This bit also implies that the GC-"
"related fields :c:member:`~PyTypeObject.tp_traverse` and "
":c:member:`~PyTypeObject.tp_clear` are present in the type object."
msgstr ""
#: ../Doc/c-api/typeobj.rst:448
msgid ""
"This is a bitmask of all the bits that pertain to the existence of "
"certain fields in the type object and its extension structures. "
"Currently, it includes the following bits: "
":const:`Py_TPFLAGS_HAVE_STACKLESS_EXTENSION`, "
":const:`Py_TPFLAGS_HAVE_VERSION_TAG`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:463
msgid ""
"These flags are used by functions such as :c:func:`PyLong_Check` to "
"quickly determine if a type is a subclass of a built-in type; such "
"specific checks are faster than a generic check, like "
":c:func:`PyObject_IsInstance`. Custom types that inherit from built-ins "
"should have their :c:member:`~PyTypeObject.tp_flags` set appropriately, "
"or the code that interacts with such types will behave differently "
"depending on what kind of check is used."
msgstr ""
#: ../Doc/c-api/typeobj.rst:474
msgid ""
"This bit is set when the :c:member:`~PyTypeObject.tp_finalize` slot is "
"present in the type structure."
msgstr ""
#: ../Doc/c-api/typeobj.rst:482
msgid ""
"An optional pointer to a NUL-terminated C string giving the docstring for"
" this type object. This is exposed as the :attr:`__doc__` attribute on "
"the type and instances of the type."
msgstr ""
#: ../Doc/c-api/typeobj.rst:486
msgid "This field is *not* inherited by subtypes."
msgstr ""
#: ../Doc/c-api/typeobj.rst:491
msgid ""
"An optional pointer to a traversal function for the garbage collector. "
"This is only used if the :const:`Py_TPFLAGS_HAVE_GC` flag bit is set. "
"More information about Python's garbage collection scheme can be found in"
" section :ref:`supporting-cycle-detection`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:496
msgid ""
"The :c:member:`~PyTypeObject.tp_traverse` pointer is used by the garbage "
"collector to detect reference cycles. A typical implementation of a "
":c:member:`~PyTypeObject.tp_traverse` function simply calls "
":c:func:`Py_VISIT` on each of the instance's members that are Python "
"objects. For example, this is function :c:func:`local_traverse` from the"
" :mod:`_thread` extension module::"
msgstr ""
#: ../Doc/c-api/typeobj.rst:511
msgid ""
"Note that :c:func:`Py_VISIT` is called only on those members that can "
"participate in reference cycles. Although there is also a ``self->key`` "
"member, it can only be *NULL* or a Python string and therefore cannot be "
"part of a reference cycle."
msgstr ""
#: ../Doc/c-api/typeobj.rst:515
msgid ""
"On the other hand, even if you know a member can never be part of a "
"cycle, as a debugging aid you may want to visit it anyway just so the "
":mod:`gc` module's :func:`~gc.get_referents` function will include it."
msgstr ""
#: ../Doc/c-api/typeobj.rst:519
msgid ""
"Note that :c:func:`Py_VISIT` requires the *visit* and *arg* parameters to"
" :c:func:`local_traverse` to have these specific names; don't name them "
"just anything."
msgstr ""
#: ../Doc/c-api/typeobj.rst:523
msgid ""
"This field is inherited by subtypes together with "
":c:member:`~PyTypeObject.tp_clear` and the :const:`Py_TPFLAGS_HAVE_GC` "
"flag bit: the flag bit, :c:member:`~PyTypeObject.tp_traverse`, and "
":c:member:`~PyTypeObject.tp_clear` are all inherited from the base type "
"if they are all zero in the subtype."
msgstr ""
#: ../Doc/c-api/typeobj.rst:531
msgid ""
"An optional pointer to a clear function for the garbage collector. This "
"is only used if the :const:`Py_TPFLAGS_HAVE_GC` flag bit is set."
msgstr ""
#: ../Doc/c-api/typeobj.rst:534
msgid ""
"The :c:member:`~PyTypeObject.tp_clear` member function is used to break "
"reference cycles in cyclic garbage detected by the garbage collector. "
"Taken together, all :c:member:`~PyTypeObject.tp_clear` functions in the "
"system must combine to break all reference cycles. This is subtle, and "
"if in any doubt supply a :c:member:`~PyTypeObject.tp_clear` function. "
"For example, the tuple type does not implement a "
":c:member:`~PyTypeObject.tp_clear` function, because it's possible to "
"prove that no reference cycle can be composed entirely of tuples. "
"Therefore the :c:member:`~PyTypeObject.tp_clear` functions of other types"
" must be sufficient to break any cycle containing a tuple. This isn't "
"immediately obvious, and there's rarely a good reason to avoid "
"implementing :c:member:`~PyTypeObject.tp_clear`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:544
msgid ""
"Implementations of :c:member:`~PyTypeObject.tp_clear` should drop the "
"instance's references to those of its members that may be Python objects,"
" and set its pointers to those members to *NULL*, as in the following "
"example::"
msgstr ""
#: ../Doc/c-api/typeobj.rst:558
msgid ""
"The :c:func:`Py_CLEAR` macro should be used, because clearing references "
"is delicate: the reference to the contained object must not be "
"decremented until after the pointer to the contained object is set to "
"*NULL*. This is because decrementing the reference count may cause the "
"contained object to become trash, triggering a chain of reclamation "
"activity that may include invoking arbitrary Python code (due to "
"finalizers, or weakref callbacks, associated with the contained object). "
"If it's possible for such code to reference *self* again, it's important "
"that the pointer to the contained object be *NULL* at that time, so that "
"*self* knows the contained object can no longer be used. The "
":c:func:`Py_CLEAR` macro performs the operations in a safe order."
msgstr ""
#: ../Doc/c-api/typeobj.rst:569
msgid ""
"Because the goal of :c:member:`~PyTypeObject.tp_clear` functions is to "
"break reference cycles, it's not necessary to clear contained objects "
"like Python strings or Python integers, which can't participate in "
"reference cycles. On the other hand, it may be convenient to clear all "
"contained Python objects, and write the type's "
":c:member:`~PyTypeObject.tp_dealloc` function to invoke "
":c:member:`~PyTypeObject.tp_clear`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:575
msgid ""
"More information about Python's garbage collection scheme can be found in"
" section :ref:`supporting-cycle-detection`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:578
msgid ""
"This field is inherited by subtypes together with "
":c:member:`~PyTypeObject.tp_traverse` and the :const:`Py_TPFLAGS_HAVE_GC`"
" flag bit: the flag bit, :c:member:`~PyTypeObject.tp_traverse`, and "
":c:member:`~PyTypeObject.tp_clear` are all inherited from the base type "
"if they are all zero in the subtype."
msgstr ""
#: ../Doc/c-api/typeobj.rst:586
msgid ""
"An optional pointer to the rich comparison function, whose signature is "
"``PyObject *tp_richcompare(PyObject *a, PyObject *b, int op)``. The first"
" parameter is guaranteed to be an instance of the type that is defined by"
" :c:type:`PyTypeObject`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:591
msgid ""
"The function should return the result of the comparison (usually "
"``Py_True`` or ``Py_False``). If the comparison is undefined, it must "
"return ``Py_NotImplemented``, if another error occurred it must return "
"``NULL`` and set an exception condition."
msgstr ""
#: ../Doc/c-api/typeobj.rst:598
msgid ""
"If you want to implement a type for which only a limited set of "
"comparisons makes sense (e.g. ``==`` and ``!=``, but not ``<`` and "
"friends), directly raise :exc:`TypeError` in the rich comparison "
"function."
msgstr ""
#: ../Doc/c-api/typeobj.rst:602
msgid ""
"This field is inherited by subtypes together with "
":c:member:`~PyTypeObject.tp_hash`: a subtype inherits "
":c:member:`~PyTypeObject.tp_richcompare` and "
":c:member:`~PyTypeObject.tp_hash` when the subtype's "
":c:member:`~PyTypeObject.tp_richcompare` and "
":c:member:`~PyTypeObject.tp_hash` are both *NULL*."
msgstr ""
#: ../Doc/c-api/typeobj.rst:607
msgid ""
"The following constants are defined to be used as the third argument for "
":c:member:`~PyTypeObject.tp_richcompare` and for "
":c:func:`PyObject_RichCompare`:"
msgstr ""
#: ../Doc/c-api/typeobj.rst:611
msgid "Constant"
msgstr ""
#: ../Doc/c-api/typeobj.rst:611
msgid "Comparison"
msgstr ""
#: ../Doc/c-api/typeobj.rst:613
msgid ":const:`Py_LT`"
msgstr ""
#: ../Doc/c-api/typeobj.rst:613
msgid "``<``"
msgstr ""
#: ../Doc/c-api/typeobj.rst:615
msgid ":const:`Py_LE`"
msgstr ""
#: ../Doc/c-api/typeobj.rst:615
msgid "``<=``"
msgstr ""
#: ../Doc/c-api/typeobj.rst:617
msgid ":const:`Py_EQ`"
msgstr ""
#: ../Doc/c-api/typeobj.rst:617
msgid "``==``"
msgstr ""
#: ../Doc/c-api/typeobj.rst:619
msgid ":const:`Py_NE`"
msgstr ""
#: ../Doc/c-api/typeobj.rst:619
msgid "``!=``"
msgstr ""
#: ../Doc/c-api/typeobj.rst:621
msgid ":const:`Py_GT`"
msgstr ""
#: ../Doc/c-api/typeobj.rst:621
msgid "``>``"
msgstr ""
#: ../Doc/c-api/typeobj.rst:623
msgid ":const:`Py_GE`"
msgstr ""
#: ../Doc/c-api/typeobj.rst:623
msgid "``>=``"
msgstr ""
#: ../Doc/c-api/typeobj.rst:629
msgid ""
"If the instances of this type are weakly referenceable, this field is "
"greater than zero and contains the offset in the instance structure of "
"the weak reference list head (ignoring the GC header, if present); this "
"offset is used by :c:func:`PyObject_ClearWeakRefs` and the "
":c:func:`PyWeakref_\\*` functions. The instance structure needs to "
"include a field of type :c:type:`PyObject\\*` which is initialized to "
"*NULL*."
msgstr ""
#: ../Doc/c-api/typeobj.rst:636
msgid ""
"Do not confuse this field with :c:member:`~PyTypeObject.tp_weaklist`; "
"that is the list head for weak references to the type object itself."
msgstr ""
#: ../Doc/c-api/typeobj.rst:639
msgid ""
"This field is inherited by subtypes, but see the rules listed below. A "
"subtype may override this offset; this means that the subtype uses a "
"different weak reference list head than the base type. Since the list "
"head is always found via :c:member:`~PyTypeObject.tp_weaklistoffset`, "
"this should not be a problem."
msgstr ""
#: ../Doc/c-api/typeobj.rst:644
msgid ""
"When a type defined by a class statement has no :attr:`~object.__slots__`"
" declaration, and none of its base types are weakly referenceable, the "
"type is made weakly referenceable by adding a weak reference list head "
"slot to the instance layout and setting the "
":c:member:`~PyTypeObject.tp_weaklistoffset` of that slot's offset."
msgstr ""
#: ../Doc/c-api/typeobj.rst:649
msgid ""
"When a type's :attr:`__slots__` declaration contains a slot named "
":attr:`__weakref__`, that slot becomes the weak reference list head for "
"instances of the type, and the slot's offset is stored in the type's "
":c:member:`~PyTypeObject.tp_weaklistoffset`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:654
msgid ""
"When a type's :attr:`__slots__` declaration does not contain a slot named"
" :attr:`__weakref__`, the type inherits its "
":c:member:`~PyTypeObject.tp_weaklistoffset` from its base type."
msgstr ""
#: ../Doc/c-api/typeobj.rst:660
msgid ""
"An optional pointer to a function that returns an iterator for the "
"object. Its presence normally signals that the instances of this type "
"are iterable (although sequences may be iterable without this function)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:664
msgid "This function has the same signature as :c:func:`PyObject_GetIter`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:671
msgid ""
"An optional pointer to a function that returns the next item in an "
"iterator. When the iterator is exhausted, it must return *NULL*; a "
":exc:`StopIteration` exception may or may not be set. When another error"
" occurs, it must return *NULL* too. Its presence signals that the "
"instances of this type are iterators."
msgstr ""
#: ../Doc/c-api/typeobj.rst:677
msgid ""
"Iterator types should also define the :c:member:`~PyTypeObject.tp_iter` "
"function, and that function should return the iterator instance itself "
"(not a new iterator instance)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:681
msgid "This function has the same signature as :c:func:`PyIter_Next`."
msgstr ""
#: ../Doc/c-api/typeobj.rst:688
msgid ""
"An optional pointer to a static *NULL*-terminated array of "
":c:type:`PyMethodDef` structures, declaring regular methods of this type."
msgstr ""
#: ../Doc/c-api/typeobj.rst:691
msgid ""
"For each entry in the array, an entry is added to the type's dictionary "
"(see :c:member:`~PyTypeObject.tp_dict` below) containing a method "
"descriptor."
msgstr ""
#: ../Doc/c-api/typeobj.rst:694
msgid ""
"This field is not inherited by subtypes (methods are inherited through a "
"different mechanism)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:700
msgid ""
"An optional pointer to a static *NULL*-terminated array of "
":c:type:`PyMemberDef` structures, declaring regular data members (fields "
"or slots) of instances of this type."
msgstr ""
#: ../Doc/c-api/typeobj.rst:704
msgid ""
"For each entry in the array, an entry is added to the type's dictionary "
"(see :c:member:`~PyTypeObject.tp_dict` below) containing a member "
"descriptor."
msgstr ""
#: ../Doc/c-api/typeobj.rst:707
msgid ""
"This field is not inherited by subtypes (members are inherited through a "
"different mechanism)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:713
msgid ""
"An optional pointer to a static *NULL*-terminated array of "
":c:type:`PyGetSetDef` structures, declaring computed attributes of "
"instances of this type."
msgstr ""
#: ../Doc/c-api/typeobj.rst:716
msgid ""
"For each entry in the array, an entry is added to the type's dictionary "
"(see :c:member:`~PyTypeObject.tp_dict` below) containing a getset "
"descriptor."
msgstr ""
#: ../Doc/c-api/typeobj.rst:719
msgid ""
"This field is not inherited by subtypes (computed attributes are "
"inherited through a different mechanism)."
msgstr ""
#: ../Doc/c-api/typeobj.rst:725
msgid ""
"An optional pointer to a base type from which type properties are "
"inherited. At this level, only single inheritance is supported; multiple"
" inheritance require dynamically creating a type object by calling the "
"metatype."
msgstr ""
#: ../Doc/c-api/typeobj.rst:729
msgid ""
"This field is not inherited by subtypes (obviously), but it defaults to "
"``&PyBaseObject_Type`` (which to Python programmers is known as the type "
":class:`object`)."
msgstr ""