整数型对象

在出错时，大多数 API返回 (返回值类型)-1 ，无法与一般的数字区分开来。请使用 PyErr_Occurred() 来区分。

PyLongObject

表示 Python 整数对象的 子类型。

PyTypeObject PyLong_Type

这个 的实例表示 Python 的整数类型。与Python层中的 int 相同。

int PyLong_Check( *p)

如果参数是 PyLongObject 或 的子类型，返回 true 。

int PyLong_CheckExact(PyObject *p)

如果参数是 但不是 PyLongObject 的子类型，返回 true。

PyLong_FromLong(long v*)

Return value: New reference.

Return a new PyLongObject object from v, or NULL on failure.

The current implementation keeps an array of integer objects for all integers between -5 and 256, when you create an int in that range you actually just get back a reference to the existing object. So it should be possible to change the value of 1. I suspect the behaviour of Python in this case is undefined. :-)

PyLong_FromUnsignedLong(unsigned long v*)

Return value: New reference.

Return a new PyLongObject object from a C unsigned long, or NULL on failure.

PyLong_FromSsize_t(Py_ssize_t v*)

Return a new PyLongObject object from a C Py_ssize_t, or NULL on failure.

PyLong_FromSize_t(size_t v*)

Return a new PyLongObject object from a C size_t, or NULL on failure.

PyLong_FromLongLong(long long v*)

Return value: New reference.

Return a new PyLongObject object from a C long long, or NULL on failure.

PyLong_FromUnsignedLongLong(unsigned long long v*)

Return value: New reference.

Return a new PyLongObject object from a C unsigned long long, or NULL on failure.

PyLong_FromDouble(double v*)

Return value: New reference.

Return a new PyLongObject object from the integer part of v, or NULL on failure.

Return value: New reference.

Return a new based on the string value in str, which is interpreted according to the radix in base. If pend is non-NULL, *pend will point to the first character in str which follows the representation of the number. If base is 0, str is interpreted using the 整型数字面值 definition; in this case, leading zeros in a non-zero decimal number raises a . If base is not 0, it must be between 2 and 36, inclusive. Leading spaces and single underscores after a base specifier and between digits are ignored. If there are no digits, ValueError will be raised.

PyLong_FromUnicode(Py_UNICODE **u, Py_ssize_t length, int base)

Return value: New reference.

Convert a sequence of Unicode digits to a Python integer value. The Unicode string is first encoded to a byte string using PyUnicode_EncodeDecimal() and then converted using .

Deprecated since version 3.3, will be removed in version 4.0: 旧的 Py_UNICODE API的一部分;请迁移到使用 。

PyObject PyLong_FromUnicodeObject( **u, int base)

Convert a sequence of Unicode digits in the string u to a Python integer value. The Unicode string is first encoded to a byte string using PyUnicode_EncodeDecimal() and then converted using PyLong_FromString().

3.3 新版功能.

PyLong_FromVoidPtr(void **p)

Return value: New reference.

从指针 p 创建一个 Python 整数。可以使用 PyLong_AsVoidPtr() 返回的指针值。

long ( *obj)

Return a C long representation of obj. If obj is not an instance of PyLongObject, first call its method (if present) to convert it to a PyLongObject.

如果 obj 的值溢出了 long 的范围，会抛出 。

发生错误时返回 -1 。使用 PyErr_Occurred() 来消歧义。

long PyLong_AsLongAndOverflow( obj*, int overflow*)

Return a C long representation of obj. If obj is not an instance of PyLongObject, first call its method (if present) to convert it to a PyLongObject.

If the value of obj is greater than LONG_MAX or less than LONG_MIN, set overflow* to 1 or -1, respectively, and return -1; otherwise, set overflow to 0. If any other exception occurs set **overflow to 0 and return -1 as usual.

发生错误时返回 -1 。使用 来消歧义。

long long PyLong_AsLongLong(PyObject *obj)

Return a C long long representation of obj. If obj is not an instance of , first call its __int__() method (if present) to convert it to a .

如果 obj 的值溢出了 long 的范围，会抛出 OverflowError。

发生错误时返回 -1 。使用 来消歧义。

long long PyLong_AsLongLongAndOverflow(PyObject obj*, int overflow*)

Return a C long long representation of obj. If obj is not an instance of , first call its __int__() method (if present) to convert it to a .

If the value of obj is greater than PY_LLONG_MAX or less than PY_LLONG_MIN, set overflow* to 1 or -1, respectively, and return -1; otherwise, set overflow to 0. If any other exception occurs set **overflow to 0 and return -1 as usual.

发生错误时返回 -1 。使用 PyErr_Occurred() 来消歧义。

3.2 新版功能.

Return a C representation of pylong. pylong must be an instance of .

Raise OverflowError if the value of pylong is out of range for a Py_ssize_t.

发生错误时返回 -1 。使用 来消歧义。

unsigned long PyLong_AsUnsignedLong(PyObject *pylong)

Return a C unsigned long representation of pylong. pylong must be an instance of .

Raise OverflowError if the value of pylong is out of range for a unsigned long.

Returns (unsigned long)-1 on error. Use to disambiguate.

size_t PyLong_AsSize_t(PyObject *pylong)

Return a C size_t representation of pylong. pylong must be an instance of .

Raise OverflowError if the value of pylong is out of range for a size_t.

Returns (size_t)-1 on error. Use to disambiguate.

unsigned long long PyLong_AsUnsignedLongLong(PyObject *pylong)

Return a C unsigned long long representation of pylong. pylong must be an instance of .

Raise OverflowError if the value of pylong is out of range for an unsigned long long.

Returns (unsigned long long)-1 on error. Use to disambiguate.

在 3.1 版更改: A negative pylong now raises OverflowError, not .

unsigned long PyLong_AsUnsignedLongMask(PyObject *obj)

Return a C unsigned long representation of obj. If obj is not an instance of , first call its __int__() method (if present) to convert it to a .

If the value of obj is out of range for an unsigned long, return the reduction of that value modulo ULONG_MAX + 1.

发生错误时返回 -1 。使用 PyErr_Occurred() 来消歧义。

unsigned long long PyLong_AsUnsignedLongLongMask( *obj)

Return a C unsigned long long representation of obj. If obj is not an instance of PyLongObject, first call its method (if present) to convert it to a PyLongObject.

If the value of obj is out of range for an unsigned long long, return the reduction of that value modulo PY_ULLONG_MAX + 1.

发生错误时返回 -1 。使用 来消歧义。

double PyLong_AsDouble(PyObject *pylong)

Return a C double representation of pylong. pylong must be an instance of .

Raise OverflowError if the value of pylong is out of range for a double.

Returns -1.0 on error. Use to disambiguate.

void PyLong_AsVoidPtr(PyObject **pylong)

Returns NULL on error. Use to disambiguate.