整數物件¶
All integers are implemented as "long" integer objects of arbitrary size.
On error, most PyLong_As*
APIs return (return type)-1
which cannot be
distinguished from a number. Use PyErr_Occurred()
to disambiguate.
-
type PyLongObject¶
- 為 受限 API 的一部分 (做為一個不透明結構 (opaque struct)).
This subtype of
PyObject
represents a Python integer object.
-
PyTypeObject PyLong_Type¶
- 為 穩定 ABI 的一部分.
This instance of
PyTypeObject
represents the Python integer type. This is the same object asint
in the Python layer.
-
int PyLong_Check(PyObject *p)¶
Return true if its argument is a
PyLongObject
or a subtype ofPyLongObject
. This function always succeeds.
-
int PyLong_CheckExact(PyObject *p)¶
Return true if its argument is a
PyLongObject
, but not a subtype ofPyLongObject
. This function always succeeds.
-
PyObject *PyLong_FromLong(long v)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Return a new
PyLongObject
object from v, orNULL
on failure.The current implementation keeps an array of integer objects for all integers between
-5
and256
. When you create an int in that range you actually just get back a reference to the existing object.
-
PyObject *PyLong_FromUnsignedLong(unsigned long v)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Return a new
PyLongObject
object from a C unsigned long, orNULL
on failure.
-
PyObject *PyLong_FromSsize_t(Py_ssize_t v)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Return a new
PyLongObject
object from a CPy_ssize_t
, orNULL
on failure.
-
PyObject *PyLong_FromSize_t(size_t v)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Return a new
PyLongObject
object from a Csize_t
, orNULL
on failure.
-
PyObject *PyLong_FromLongLong(long long v)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Return a new
PyLongObject
object from a C long long, orNULL
on failure.
-
PyObject *PyLong_FromUnsignedLongLong(unsigned long long v)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Return a new
PyLongObject
object from a C unsigned long long, orNULL
on failure.
-
PyObject *PyLong_FromDouble(double v)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Return a new
PyLongObject
object from the integer part of v, orNULL
on failure.
-
PyObject *PyLong_FromString(const char *str, char **pend, int base)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Return a new
PyLongObject
based on the string value in str, which is interpreted according to the radix in base, orNULL
on failure. If pend is non-NULL
, *pend will point to the end of str on success or to the first character that could not be processed on error. If base is0
, str is interpreted using the Integer literals definition; in this case, leading zeros in a non-zero decimal number raises aValueError
. If base is not0
, it must be between2
and36
, inclusive. Leading and trailing whitespace and single underscores after a base specifier and between digits are ignored. If there are no digits or str is not NULL-terminated following the digits and trailing whitespace,ValueError
will be raised.也參考
Python methods
int.to_bytes()
andint.from_bytes()
to convert aPyLongObject
to/from an array of bytes in base256
. You can call those from C usingPyObject_CallMethod()
.
-
PyObject *PyLong_FromUnicodeObject(PyObject *u, int base)¶
- 回傳值:新的參照。
Convert a sequence of Unicode digits in the string u to a Python integer value.
在 3.3 版被加入.
-
PyObject *PyLong_FromVoidPtr(void *p)¶
- 回傳值:新的參照。 為 穩定 ABI 的一部分.
Create a Python integer from the pointer p. The pointer value can be retrieved from the resulting value using
PyLong_AsVoidPtr()
.
-
long PyLong_AsLong(PyObject *obj)¶
- 為 穩定 ABI 的一部分.
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
.Raise
OverflowError
if the value of obj is out of range for a long.Returns
-1
on error. UsePyErr_Occurred()
to disambiguate.在 3.8 版的變更: Use
__index__()
if available.在 3.10 版的變更: This function will no longer use
__int__()
.
-
long PyLong_AsLongAndOverflow(PyObject *obj, int *overflow)¶
- 為 穩定 ABI 的一部分.
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_MAX
or less thanLONG_MIN
, set *overflow to1
or-1
, respectively, and return-1
; otherwise, set *overflow to0
. If any other exception occurs set *overflow to0
and return-1
as usual.Returns
-1
on error. UsePyErr_Occurred()
to disambiguate.在 3.8 版的變更: Use
__index__()
if available.在 3.10 版的變更: This function will no longer use
__int__()
.
-
long long PyLong_AsLongLong(PyObject *obj)¶
- 為 穩定 ABI 的一部分.
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
.Raise
OverflowError
if the value of obj is out of range for a long long.Returns
-1
on error. UsePyErr_Occurred()
to disambiguate.在 3.8 版的變更: Use
__index__()
if available.在 3.10 版的變更: This function will no longer use
__int__()
.
-
long long PyLong_AsLongLongAndOverflow(PyObject *obj, int *overflow)¶
- 為 穩定 ABI 的一部分.
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_MAX
or less thanLLONG_MIN
, set *overflow to1
or-1
, respectively, and return-1
; otherwise, set *overflow to0
. If any other exception occurs set *overflow to0
and return-1
as usual.Returns
-1
on error. UsePyErr_Occurred()
to disambiguate.在 3.2 版被加入.
在 3.8 版的變更: Use
__index__()
if available.在 3.10 版的變更: This function will no longer use
__int__()
.
-
Py_ssize_t PyLong_AsSsize_t(PyObject *pylong)¶
- 為 穩定 ABI 的一部分.
Return a C
Py_ssize_t
representation of pylong. pylong must be an instance ofPyLongObject
.Raise
OverflowError
if the value of pylong is out of range for aPy_ssize_t
.Returns
-1
on error. UsePyErr_Occurred()
to disambiguate.
-
unsigned long PyLong_AsUnsignedLong(PyObject *pylong)¶
- 為 穩定 ABI 的一部分.
Return a C unsigned long representation of pylong. pylong must be an instance of
PyLongObject
.Raise
OverflowError
if the value of pylong is out of range for a unsigned long.Returns
(unsigned long)-1
on error. UsePyErr_Occurred()
to disambiguate.
-
size_t PyLong_AsSize_t(PyObject *pylong)¶
- 為 穩定 ABI 的一部分.
Return a C
size_t
representation of pylong. pylong must be an instance ofPyLongObject
.Raise
OverflowError
if the value of pylong is out of range for asize_t
.Returns
(size_t)-1
on error. UsePyErr_Occurred()
to disambiguate.
-
unsigned long long PyLong_AsUnsignedLongLong(PyObject *pylong)¶
- 為 穩定 ABI 的一部分.
Return a C unsigned long long representation of pylong. pylong must be an instance of
PyLongObject
.Raise
OverflowError
if the value of pylong is out of range for an unsigned long long.Returns
(unsigned long long)-1
on error. UsePyErr_Occurred()
to disambiguate.在 3.1 版的變更: A negative pylong now raises
OverflowError
, notTypeError
.
-
unsigned long PyLong_AsUnsignedLongMask(PyObject *obj)¶
- 為 穩定 ABI 的一部分.
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)-1
on error. UsePyErr_Occurred()
to disambiguate.在 3.8 版的變更: Use
__index__()
if available.在 3.10 版的變更: This function will no longer use
__int__()
.
-
unsigned long long PyLong_AsUnsignedLongLongMask(PyObject *obj)¶
- 為 穩定 ABI 的一部分.
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)-1
on error. UsePyErr_Occurred()
to disambiguate.在 3.8 版的變更: Use
__index__()
if available.在 3.10 版的變更: This function will no longer use
__int__()
.
-
double PyLong_AsDouble(PyObject *pylong)¶
- 為 穩定 ABI 的一部分.
Return a C double representation of pylong. pylong must be an instance of
PyLongObject
.Raise
OverflowError
if the value of pylong is out of range for a double.Returns
-1.0
on error. UsePyErr_Occurred()
to disambiguate.
-
void *PyLong_AsVoidPtr(PyObject *pylong)¶
- 為 穩定 ABI 的一部分.
Convert a Python integer pylong to a C void pointer. If pylong cannot be converted, an
OverflowError
will be raised. This is only assured to produce a usable void pointer for values created withPyLong_FromVoidPtr()
.Returns
NULL
on error. UsePyErr_Occurred()
to disambiguate.
-
PyObject *PyLong_GetInfo(void)¶
- 為 穩定 ABI 的一部分.
On success, return a read only named tuple, that holds information about Python's internal representation of integers. See
sys.int_info
for description of individual fields.在失敗時,會回傳
NULL
並設定例外。在 3.1 版被加入.
-
int PyUnstable_Long_IsCompact(const PyLongObject *op)¶
- 這是 不穩定 API,它可能在小版本發布中沒有任何警告地被變更。
Return 1 if op is compact, 0 otherwise.
This function makes it possible for performance-critical code to implement a “fast path” for small integers. For compact values use
PyUnstable_Long_CompactValue()
; for others fall back to aPyLong_As*
function orcalling
int.to_bytes()
.The speedup is expected to be negligible for most users.
Exactly what values are considered compact is an implementation detail and is subject to change.
在 3.12 版被加入.
-
Py_ssize_t PyUnstable_Long_CompactValue(const PyLongObject *op)¶
- 這是 不穩定 API,它可能在小版本發布中沒有任何警告地被變更。
If op is compact, as determined by
PyUnstable_Long_IsCompact()
, return its value.Otherwise, the return value is undefined.
在 3.12 版被加入.