整数型对象¶
所有整数都使用以任意大小的长整数对象表示。
在出错时,大多数 PyLong_As* API返回 (返回类型)-1 ,无法与一般的数字区分开来。请使用 PyErr_Occurred() 来区分。
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type
PyLongObject¶ - Part of the Stable ABI.
表示 Python 整数对象的
PyObject子类型。
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PyTypeObject
PyLong_Type¶ - Part of the Stable ABI.
这个
PyTypeObject的实例表示 Python 的整数类型。与Python层中的int相同。
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int
PyLong_Check(PyObject *p)¶ 如果它的参数是
PyLongObject或PyLongObject的子类型则返回真值。 此函数总是会成功执行。
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int
PyLong_CheckExact(PyObject *p)¶ 如果它的参数是
PyLongObject,但不是PyLongObject的子类型则返回真值。 此函数总是会成功执行。
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PyObject *
PyLong_FromLong(long v)¶ - Return value: New reference. Part of the Stable ABI.
由 v 返回一个新的
PyLongObject对象,失败时返回NULL。当前的实现维护了一个整数对象数组,包含
-5和256之间的所有整数对象。当你在这个范围内创建一个 int 时,实际上得到的是一个对已有对象的引用。
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PyObject *
PyLong_FromUnsignedLong(unsigned long v)¶ - Return value: New reference. Part of the Stable ABI.
由 C unsigned long 类型返回一个新的
PyLongObject对象,失败时返回NULL。
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PyObject *
PyLong_FromSsize_t(Py_ssize_t v)¶ - Return value: New reference. Part of the Stable ABI.
从 C
Py_ssize_t类型返回一个新的PyLongObject对象,如果失败则返回NULL。
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PyObject *
PyLong_FromSize_t(size_t v)¶ - Return value: New reference. Part of the Stable ABI.
从 C
size_t返回一个新的PyLongObject对象,如果失败则返回NULL。
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PyObject *
PyLong_FromLongLong(long long v)¶ - Return value: New reference. Part of the Stable ABI.
从 C long long 返回一个新的
PyLongObject对象,失败时返回NULL。
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PyObject *
PyLong_FromUnsignedLongLong(unsigned long long v)¶ - Return value: New reference. Part of the Stable ABI.
从 C unsigned long long 返回一个新的
PyLongObject对象,失败时返回NULL。
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PyObject *
PyLong_FromDouble(double v)¶ - Return value: New reference. Part of the Stable ABI.
从 v 的整数部分返回一个新的
PyLongObject对象,如果失败则返回NULL。
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PyObject *
PyLong_FromString(const char *str, char **pend, int base)¶ - Return value: New reference. Part of the Stable ABI.
根据 str 字符串值返回一个新的
PyLongObject,base 指定基数。如果 pend 不是NULL, /*pend 将指向 str 中表示这个数字部分的后面的第一个字符。如果 base 是0, str 将使用 整数字面值 定义来解释;在这种情况下,一个非零的十进制数中的前导零会引发一个ValueError。如果 base 不是0,它必须在2和36之间,包括2和36。基数说明符后以及数字之间的前导空格、单下划线将被忽略。如果没有数字,将引发ValueError。
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PyObject *
PyLong_FromUnicodeObject(PyObject *u, int base)¶ - Return value: New reference.
将字符串 u 中的 Unicode 数字序列转换为 Python 整数值。
3.3 新版功能.
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PyObject *
PyLong_FromVoidPtr(void *p)¶ - Return value: New reference. Part of the Stable ABI.
从指针 p 创建一个 Python 整数。可以使用
PyLong_AsVoidPtr()返回的指针值。
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long
PyLong_AsLong(PyObject *obj)¶ - Part of the Stable ABI.
Return a C long representation of obj. If obj is not an instance of
PyLongObject, first call its__index__()method (if present) to convert it to aPyLongObject.如果 obj 的值溢出了 long 的范围,会引发
OverflowError。发生错误时返回
-1。使用PyErr_Occurred()来消歧义。在 3.8 版更改: 如果可用将使用
__index__()。在 3.10 版更改: This function will no longer use
__int__().
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long
PyLong_AsLongAndOverflow(PyObject *obj, int *overflow)¶ - Part of the Stable ABI.
Return a C long representation of obj. If obj is not an instance of
PyLongObject, first call its__index__()method (if present) to convert it to aPyLongObject.If the value of obj is greater than
LONG_MAXor less thanLONG_MIN, set *overflow to1or-1, respectively, and return-1; otherwise, set *overflow to0. If any other exception occurs set *overflow to0and return-1as usual.发生错误时返回
-1。使用PyErr_Occurred()来消歧义。在 3.8 版更改: 如果可用将使用
__index__()。在 3.10 版更改: This function will no longer use
__int__().
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long long
PyLong_AsLongLong(PyObject *obj)¶ - Part of the Stable ABI.
Return a C long long representation of obj. If obj is not an instance of
PyLongObject, first call its__index__()method (if present) to convert it to aPyLongObject.如果 obj 值超出 long long ,触发
OverflowError发生错误时返回
-1。使用PyErr_Occurred()来消歧义。在 3.8 版更改: 如果可用将使用
__index__()。在 3.10 版更改: This function will no longer use
__int__().
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long long
PyLong_AsLongLongAndOverflow(PyObject *obj, int *overflow)¶ - Part of the Stable ABI.
Return a C long long representation of obj. If obj is not an instance of
PyLongObject, first call its__index__()method (if present) to convert it to aPyLongObject.If the value of obj is greater than
LLONG_MAXor less thanLLONG_MIN, set *overflow to1or-1, respectively, and return-1; otherwise, set *overflow to0. If any other exception occurs set *overflow to0and return-1as usual.发生错误时返回
-1。使用PyErr_Occurred()来消歧义。3.2 新版功能.
在 3.8 版更改: 如果可用将使用
__index__()。在 3.10 版更改: This function will no longer use
__int__().
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Py_ssize_t
PyLong_AsSsize_t(PyObject *pylong)¶ - Part of the Stable ABI.
Return a C
Py_ssize_trepresentation of pylong. pylong must be an instance ofPyLongObject.Raise
OverflowErrorif the value of pylong is out of range for aPy_ssize_t.发生错误时返回
-1。使用PyErr_Occurred()来消歧义。
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unsigned long
PyLong_AsUnsignedLong(PyObject *pylong)¶ - Part of the Stable ABI.
Return a C unsigned long representation of pylong. pylong must be an instance of
PyLongObject.Raise
OverflowErrorif the value of pylong is out of range for a unsigned long.Returns
(unsigned long)-1on error. UsePyErr_Occurred()to disambiguate.
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size_t
PyLong_AsSize_t(PyObject *pylong)¶ - Part of the Stable ABI.
Return a C
size_trepresentation of pylong. pylong must be an instance ofPyLongObject.Raise
OverflowErrorif the value of pylong is out of range for asize_t.Returns
(size_t)-1on error. UsePyErr_Occurred()to disambiguate.
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unsigned long long
PyLong_AsUnsignedLongLong(PyObject *pylong)¶ - Part of the Stable ABI.
Return a C unsigned long long representation of pylong. pylong must be an instance of
PyLongObject.Raise
OverflowErrorif the value of pylong is out of range for an unsigned long long.Returns
(unsigned long long)-1on error. UsePyErr_Occurred()to disambiguate.在 3.1 版更改: A negative pylong now raises
OverflowError, notTypeError.
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unsigned long
PyLong_AsUnsignedLongMask(PyObject *obj)¶ - Part of the Stable ABI.
Return a C unsigned long representation of obj. If obj is not an instance of
PyLongObject, first call its__index__()method (if present) to convert it to aPyLongObject.If the value of obj is out of range for an unsigned long, return the reduction of that value modulo
ULONG_MAX + 1.Returns
(unsigned long)-1on error. UsePyErr_Occurred()to disambiguate.在 3.8 版更改: 如果可用将使用
__index__()。在 3.10 版更改: This function will no longer use
__int__().
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unsigned long long
PyLong_AsUnsignedLongLongMask(PyObject *obj)¶ - Part of the Stable ABI.
Return a C unsigned long long representation of obj. If obj is not an instance of
PyLongObject, first call its__index__()method (if present) to convert it to aPyLongObject.If the value of obj is out of range for an unsigned long long, return the reduction of that value modulo
ULLONG_MAX + 1.Returns
(unsigned long long)-1on error. UsePyErr_Occurred()to disambiguate.在 3.8 版更改: 如果可用将使用
__index__()。在 3.10 版更改: This function will no longer use
__int__().
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double
PyLong_AsDouble(PyObject *pylong)¶ - Part of the Stable ABI.
Return a C double representation of pylong. pylong must be an instance of
PyLongObject.Raise
OverflowErrorif the value of pylong is out of range for a double.Returns
-1.0on error. UsePyErr_Occurred()to disambiguate.
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void *
PyLong_AsVoidPtr(PyObject *pylong)¶ - Part of the Stable ABI.
Convert a Python integer pylong to a C void pointer. If pylong cannot be converted, an
OverflowErrorwill be raised. This is only assured to produce a usable void pointer for values created withPyLong_FromVoidPtr().Returns
NULLon error. UsePyErr_Occurred()to disambiguate.