整数型オブジェクト (integer object)¶

すべての整数は任意の長さをもつ "long" 整数として実装されます。

エラーが起きると、ほとんどの PyLong_As* API は (return type)-1 を返しますが、これは数値と見分けが付きません。 見分けを付けるためには PyErr_Occurred() を使ってください。

typePyLongObject¶

次に属します: Limited API (不透明な構造体として).

この PyObject のサブタイプは整数型を表現します。

PyTypeObject PyLong_Type¶

次に属します: Stable ABI.

この PyTypeObject のインスタンスは Python 整数型を表現します。これは Python レイヤにおける int と同じオブジェクトです。

intPyLong_Check(PyObject *p)¶

引数が PyLongObject か PyLongObject のサブタイプであるときに真を返します。この関数は常に成功します。

intPyLong_CheckExact(PyObject *p)¶

引数が PyLongObject であるが PyLongObject のサブタイプでないときに真を返します。この関数は常に成功します。

PyObject *PyLong_FromLong(longv)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

v から新たな PyLongObject オブジェクトを生成して返します。失敗のときには NULL を返します。

CPython 実装の詳細: CPython 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.

PyObject *PyLong_FromUnsignedLong(unsignedlongv)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

Cの unsignedlong から新たな PyLongObject オブジェクトを生成して返します。失敗した際には NULL を返します。

PyObject *PyLong_FromSsize_t(Py_ssize_t v)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

C の Py_ssize_t 型から新たな PyLongObject オブジェクトを生成して返します。 失敗のときには NULL を返します。

PyObject *PyLong_FromSize_t(size_tv)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

C の size_t 型から新たな PyLongObject オブジェクトを生成して返します。 失敗のときには NULL を返します。

PyObject *PyLong_FromLongLong(longlongv)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

C の longlong 型から新たな PyLongObject オブジェクトを生成して返します。失敗のときには NULL を返します。

PyObject *PyLong_FromInt32(int32_tvalue)¶

PyObject *PyLong_FromInt64(int64_tvalue)¶

次に属します: Stable ABI (バージョン 3.14 より).

Return a new PyLongObject object from a signed C int32_t or int64_t, or NULL with an exception set on failure.

Added in version 3.14.

PyObject *PyLong_FromUnsignedLongLong(unsignedlonglongv)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

C の unsignedlonglong 型から新たな PyLongObject オブジェクトを生成して返します。失敗のときには NULL を返します。

PyObject *PyLong_FromUInt32(uint32_tvalue)¶

PyObject *PyLong_FromUInt64(uint64_tvalue)¶

次に属します: Stable ABI (バージョン 3.14 より).

Return a new PyLongObject object from an unsigned C uint32_t or uint64_t, or NULL with an exception set on failure.

Added in version 3.14.

PyObject *PyLong_FromDouble(doublev)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

v の整数部から新たな PyLongObject オブジェクトを生成して返します。失敗のときには NULL を返します。

PyObject *PyLong_FromString(constchar*str, char**pend, intbase)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

Return a new PyLongObject based on the string value in str, which is interpreted according to the radix in base, or NULL 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 is 0, str is interpreted using the 整数リテラル definition; in this case, leading zeros in a non-zero decimal number raises a ValueError. If base is not 0, it must be between 2 and 36, 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.

参考

PyLong_AsNativeBytes() and PyLong_FromNativeBytes() functions can be used to convert a PyLongObject to/from an array of bytes in base 256.

PyObject *PyLong_FromUnicodeObject(PyObject *u, intbase)¶

戻り値: 新しい参照。

Convert a sequence of Unicode digits in the string u to a Python integer value.

Added in version 3.3.

PyObject *PyLong_FromVoidPtr(void*p)¶

戻り値: 新しい参照。 次に属します: Stable ABI.

ポインタ p から Python 整数値を生成します。ポインタの値は PyLong_AsVoidPtr() を適用した結果から取得されます。

PyObject *PyLong_FromNativeBytes(constvoid*buffer, size_tn_bytes, intflags)¶

次に属します: Stable ABI (バージョン 3.14 より).

Create a Python integer from the value contained in the first n_bytes of buffer, interpreted as a two's-complement signed number.

flags are as for PyLong_AsNativeBytes(). Passing -1 will select the native endian that CPython was compiled with and assume that the most-significant bit is a sign bit. Passing Py_ASNATIVEBYTES_UNSIGNED_BUFFER will produce the same result as calling PyLong_FromUnsignedNativeBytes(). Other flags are ignored.

Added in version 3.13.

PyObject *PyLong_FromUnsignedNativeBytes(constvoid*buffer, size_tn_bytes, intflags)¶

次に属します: Stable ABI (バージョン 3.14 より).

Create a Python integer from the value contained in the first n_bytes of buffer, interpreted as an unsigned number.

flags are as for PyLong_AsNativeBytes(). Passing -1 will select the native endian that CPython was compiled with and assume that the most-significant bit is not a sign bit. Flags other than endian are ignored.

Added in version 3.13.

PyLong_FromPid(pid)¶

Macro for creating a Python integer from a process identifier.

This can be defined as an alias to PyLong_FromLong() or PyLong_FromLongLong(), depending on the size of the system's PID type.

Added in version 3.2.

longPyLong_AsLong(PyObject *obj)¶

次に属します: 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 a PyLongObject.

もし obj の値が long の範囲外であれば、 OverflowError を送出します。

エラーが起きたときに -1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

バージョン 3.8 で変更: 可能であれば __index__() を使うようになりました。

バージョン 3.10 で変更: This function will no longer use __int__().

longPyLong_AS_LONG(PyObject *obj)¶

A soft deprecated alias. Exactly equivalent to the preferred PyLong_AsLong. In particular, it can fail with OverflowError or another exception.

バージョン 3.14 で非推奨: The function is soft deprecated.

intPyLong_AsInt(PyObject *obj)¶

次に属します: Stable ABI (バージョン 3.13 より).

Similar to PyLong_AsLong(), but store the result in a C int instead of a C long.

Added in version 3.13.

longPyLong_AsLongAndOverflow(PyObject *obj, int*overflow)¶

次に属します: 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 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.

エラーが起きたときに -1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

バージョン 3.8 で変更: 可能であれば __index__() を使うようになりました。

バージョン 3.10 で変更: This function will no longer use __int__().

longlongPyLong_AsLongLong(PyObject *obj)¶

次に属します: Stable ABI.

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

もし obj の値が longlong の範囲外であれば、 OverflowError を送出します。

エラーが起きたときに -1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

バージョン 3.8 で変更: 可能であれば __index__() を使うようになりました。

バージョン 3.10 で変更: This function will no longer use __int__().

longlongPyLong_AsLongLongAndOverflow(PyObject *obj, int*overflow)¶

次に属します: Stable ABI.

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

If the value of obj is greater than LLONG_MAX or less than 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.

エラーが起きたときに -1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

Added in version 3.2.

バージョン 3.8 で変更: 可能であれば __index__() を使うようになりました。

バージョン 3.10 で変更: This function will no longer use __int__().

Py_ssize_t PyLong_AsSsize_t(PyObject *pylong)¶

次に属します: Stable ABI.

pylong を表す C の Py_ssize_t を返します。 pylong は PyLongObject のインスタンスでなければなりません。

もし pylong の値が Py_ssize_t の範囲外であれば、 OverflowError を送出します。

エラーが起きたときに -1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

unsignedlongPyLong_AsUnsignedLong(PyObject *pylong)¶

次に属します: Stable ABI.

pylong を表す C の unsignedlong を返します。 pylong は PyLongObject のインスタンスでなければなりません。

もし pylong の値が unsignedlong の範囲外であれば、 OverflowError を送出します。

エラーが起きたときに (unsigned long)-1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

size_tPyLong_AsSize_t(PyObject *pylong)¶

次に属します: Stable ABI.

pylong を表す C の size_t を返します。 pylong は PyLongObject のインスタンスでなければなりません。

もし pylong の値が size_t の範囲外であれば、 OverflowError を送出します。

エラーが起きたときに (size_t)-1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

unsignedlonglongPyLong_AsUnsignedLongLong(PyObject *pylong)¶

次に属します: Stable ABI.

pylong を表す C の unsignedlonglong を返します。 pylong は PyLongObject のインスタンスでなければなりません。

もし pylong の値が unsignedlonglong の範囲外であれば、 OverflowError を送出します。

エラーが起きたときに (unsigned long long)-1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

バージョン 3.1 で変更: 負 pylong を指定した際に TypeError ではなく、 OverflowError を送出するようになりました。

unsignedlongPyLong_AsUnsignedLongMask(PyObject *obj)¶

次に属します: Stable ABI.

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

obj の値が unsignedlong の範囲から外れていた場合は、 ULONG_MAX + 1 を法とした剰余を返します。

エラーが起きたときに (unsigned long)-1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

バージョン 3.8 で変更: 可能であれば __index__() を使うようになりました。

バージョン 3.10 で変更: This function will no longer use __int__().

unsignedlonglongPyLong_AsUnsignedLongLongMask(PyObject *obj)¶

次に属します: Stable ABI.

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

obj の値が unsignedlonglong の範囲から外れていた場合は、 ULLONG_MAX + 1 を法とした剰余を返します。

エラーが起きたときに (unsigned long long)-1 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

バージョン 3.8 で変更: 可能であれば __index__() を使うようになりました。

バージョン 3.10 で変更: This function will no longer use __int__().

intPyLong_AsInt32(PyObject *obj, int32_t*value)¶

intPyLong_AsInt64(PyObject *obj, int64_t*value)¶

次に属します: Stable ABI (バージョン 3.14 より).

Set *value to a signed C int32_t or int64_t representation of obj.

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

If the obj value is out of range, raise an OverflowError.

Set *value and return 0 on success. Set an exception and return -1 on error.

value must not be NULL.

Added in version 3.14.

intPyLong_AsUInt32(PyObject *obj, uint32_t*value)¶

intPyLong_AsUInt64(PyObject *obj, uint64_t*value)¶

次に属します: Stable ABI (バージョン 3.14 より).

Set *value to an unsigned C uint32_t or uint64_t representation of obj.

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

• If obj is negative, raise a ValueError.

• If the obj value is out of range, raise an OverflowError.

Set *value and return 0 on success. Set an exception and return -1 on error.

value must not be NULL.

Added in version 3.14.

doublePyLong_AsDouble(PyObject *pylong)¶

次に属します: Stable ABI.

pylong を表す C の double を返します。 pylong は PyLongObject のインスタンスでなければなりません。

もし pylong の値が double の範囲外であれば、 OverflowError を送出します。

エラーが起きたときに -1.0 を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

void*PyLong_AsVoidPtr(PyObject *pylong)¶

次に属します: Stable ABI.

Python の整数型を指す pylong を、 C の void ポインタに変換します。 pylong を変換できなければ、 OverflowError を送出します。この関数は PyLong_FromVoidPtr() で値を生成するときに使うような void ポインタ型を生成できるだけです。

エラーが起きたときに NULL を返します。 見分けを付けるためには PyErr_Occurred() を使ってください。

Py_ssize_t PyLong_AsNativeBytes(PyObject *pylong, void*buffer, Py_ssize_t n_bytes, intflags)¶

次に属します: Stable ABI (バージョン 3.14 より).

Copy the Python integer value pylong to a native buffer of size n_bytes. The flags can be set to -1 to behave similarly to a C cast, or to values documented below to control the behavior.

Returns -1 with an exception raised on error. This may happen if pylong cannot be interpreted as an integer, or if pylong was negative and the Py_ASNATIVEBYTES_REJECT_NEGATIVE flag was set.

Otherwise, returns the number of bytes required to store the value. If this is equal to or less than n_bytes, the entire value was copied. All n_bytes of the buffer are written: large buffers are padded with zeroes.

If the returned value is greater than n_bytes, the value was truncated: as many of the lowest bits of the value as could fit are written, and the higher bits are ignored. This matches the typical behavior of a C-style downcast.

注釈

Overflow is not considered an error. If the returned value is larger than n_bytes, most significant bits were discarded.

0 will never be returned.

Values are always copied as two's-complement.

Usage example:

int32_tvalue;
Py_ssize_tbytes=PyLong_AsNativeBytes(pylong,&value,sizeof(value),-1);
if(bytes<0){
// Failed. A Python exception was set with the reason.
returnNULL;
}
elseif(bytes<=(Py_ssize_t)sizeof(value)){
// Success!
}
else{
// Overflow occurred, but 'value' contains the truncated
// lowest bits of pylong.
}

Passing zero to n_bytes will return the size of a buffer that would be large enough to hold the value. This may be larger than technically necessary, but not unreasonably so. If n_bytes=0, buffer may be NULL.

注釈

Passing n_bytes=0 to this function is not an accurate way to determine the bit length of the value.

To get at the entire Python value of an unknown size, the function can be called twice: first to determine the buffer size, then to fill it:

// Ask how much space we need.
Py_ssize_texpected=PyLong_AsNativeBytes(pylong,NULL,0,-1);
if(expected<0){
// Failed. A Python exception was set with the reason.
returnNULL;
}
assert(expected!=0);// Impossible per the API definition.
uint8_t*bignum=malloc(expected);
if(!bignum){
PyErr_SetString(PyExc_MemoryError,"bignum malloc failed.");
returnNULL;
}
// Safely get the entire value.
Py_ssize_tbytes=PyLong_AsNativeBytes(pylong,bignum,expected,-1);
if(bytes<0){// Exception has been set.
free(bignum);
returnNULL;
}
elseif(bytes>expected){// This should not be possible.
PyErr_SetString(PyExc_RuntimeError,
"Unexpected bignum truncation after a size check.");
free(bignum);
returnNULL;
}
// The expected success given the above pre-check.
// ... use bignum ...
free(bignum);

flags is either -1 (Py_ASNATIVEBYTES_DEFAULTS) to select defaults that behave most like a C cast, or a combination of the other flags in the table below. Note that -1 cannot be combined with other flags.

Currently, -1 corresponds to Py_ASNATIVEBYTES_NATIVE_ENDIAN | Py_ASNATIVEBYTES_UNSIGNED_BUFFER.

Flag	値
Py_ASNATIVEBYTES_DEFAULTS¶ 次に属します: Stable ABI (バージョン 3.14 より).	-1
Py_ASNATIVEBYTES_BIG_ENDIAN¶ 次に属します: Stable ABI (バージョン 3.14 より).	0
Py_ASNATIVEBYTES_LITTLE_ENDIAN¶ 次に属します: Stable ABI (バージョン 3.14 より).	1
Py_ASNATIVEBYTES_NATIVE_ENDIAN¶ 次に属します: Stable ABI (バージョン 3.14 より).	3
Py_ASNATIVEBYTES_UNSIGNED_BUFFER¶ 次に属します: Stable ABI (バージョン 3.14 より).	4
Py_ASNATIVEBYTES_REJECT_NEGATIVE¶ 次に属します: Stable ABI (バージョン 3.14 より).	8
Py_ASNATIVEBYTES_ALLOW_INDEX¶ 次に属します: Stable ABI (バージョン 3.14 より).	16

Specifying Py_ASNATIVEBYTES_NATIVE_ENDIAN will override any other endian flags. Passing 2 is reserved.

By default, sufficient buffer will be requested to include a sign bit. For example, when converting 128 with n_bytes=1, the function will return 2 (or more) in order to store a zero sign bit.

If Py_ASNATIVEBYTES_UNSIGNED_BUFFER is specified, a zero sign bit will be omitted from size calculations. This allows, for example, 128 to fit in a single-byte buffer. If the destination buffer is later treated as signed, a positive input value may become negative. Note that the flag does not affect handling of negative values: for those, space for a sign bit is always requested.

Specifying Py_ASNATIVEBYTES_REJECT_NEGATIVE causes an exception to be set if pylong is negative. Without this flag, negative values will be copied provided there is enough space for at least one sign bit, regardless of whether Py_ASNATIVEBYTES_UNSIGNED_BUFFER was specified.

If Py_ASNATIVEBYTES_ALLOW_INDEX is specified and a non-integer value is passed, its __index__() method will be called first. This may result in Python code executing and other threads being allowed to run, which could cause changes to other objects or values in use. When flags is -1, this option is not set, and non-integer values will raise TypeError.

注釈

With the default flags (-1, or UNSIGNED_BUFFER without REJECT_NEGATIVE), multiple Python integers can map to a single value without overflow. For example, both 255 and -1 fit a single-byte buffer and set all its bits. This matches typical C cast behavior.

Added in version 3.13.

PyLong_AsPid(pid)¶

Macro for converting a Python integer into a process identifier.

This can be defined as an alias to PyLong_AsLong(), PyLong_FromLongLong(), or PyLong_AsInt(), depending on the size of the system's PID type.

Added in version 3.2.

intPyLong_GetSign(PyObject *obj, int*sign)¶

Get the sign of the integer object obj.

On success, set *sign to the integer sign (0, -1 or +1 for zero, negative or positive integer, respectively) and return 0.

On failure, return -1 with an exception set. This function always succeeds if obj is a PyLongObject or its subtype.

Added in version 3.14.

intPyLong_IsPositive(PyObject *obj)¶

Check if the integer object obj is positive (obj > 0).

If obj is an instance of PyLongObject or its subtype, return 1 when it's positive and 0 otherwise. Else set an exception and return -1.

Added in version 3.14.

intPyLong_IsNegative(PyObject *obj)¶

Check if the integer object obj is negative (obj < 0).

If obj is an instance of PyLongObject or its subtype, return 1 when it's negative and 0 otherwise. Else set an exception and return -1.

Added in version 3.14.

intPyLong_IsZero(PyObject *obj)¶

Check if the integer object obj is zero.

If obj is an instance of PyLongObject or its subtype, return 1 when it's zero and 0 otherwise. Else set an exception and return -1.

Added in version 3.14.

PyObject *PyLong_GetInfo(void)¶

次に属します: Stable ABI.

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.

On failure, return NULL with an exception set.

Added in version 3.1.

intPyUnstable_Long_IsCompact(constPyLongObject *op)¶

これは Unstable APIです。マイナーリリースで予告なく変更されることがあります。

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 a PyLong_As* function or PyLong_AsNativeBytes().

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.

Added in version 3.12.

Py_ssize_t PyUnstable_Long_CompactValue(constPyLongObject *op)¶

これは Unstable APIです。マイナーリリースで予告なく変更されることがあります。

If op is compact, as determined by PyUnstable_Long_IsCompact(), return its value.

Otherwise, the return value is undefined.

Added in version 3.12.

Export API¶

Added in version 3.14.

structPyLongLayout¶

Layout of an array of "digits" ("limbs" in the GMP terminology), used to represent absolute value for arbitrary precision integers.

Use PyLong_GetNativeLayout() to get the native layout of Python int objects, used internally for integers with "big enough" absolute value.

See also sys.int_info which exposes similar information in Python.

uint8_tbits_per_digit¶

Bits per digit. For example, a 15 bit digit means that bits 0-14 contain meaningful information.

uint8_tdigit_size¶

Digit size in bytes. For example, a 15 bit digit will require at least 2 bytes.

int8_tdigits_order¶

Digits order:

• 1 for most significant digit first

• -1 for least significant digit first

int8_tdigit_endianness¶

Digit endianness:

• 1 for most significant byte first (big endian)

• -1 for least significant byte first (little endian)

constPyLongLayout *PyLong_GetNativeLayout(void)¶

Get the native layout of Python int objects.

See the PyLongLayout structure.

The function must not be called before Python initialization nor after Python finalization. The returned layout is valid until Python is finalized. The layout is the same for all Python sub-interpreters in a process, and so it can be cached.

structPyLongExport¶

Export of a Python int object.

There are two cases:

• If digits is NULL, only use the value member.

• If digits is not NULL, use negative, ndigits and digits members.

int64_tvalue¶

The native integer value of the exported int object. Only valid if digits is NULL.

uint8_tnegative¶

1 if the number is negative, 0 otherwise. Only valid if digits is not NULL.

Py_ssize_t ndigits¶

Number of digits in digits array. Only valid if digits is not NULL.

constvoid*digits¶

Read-only array of unsigned digits. Can be NULL.

intPyLong_Export(PyObject *obj, PyLongExport *export_long)¶

Export a Python int object.

export_long must point to a PyLongExport structure allocated by the caller. It must not be NULL.

On success, fill in *export_long and return 0. On error, set an exception and return -1.

PyLong_FreeExport() must be called when the export is no longer needed.

CPython 実装の詳細: This function always succeeds if obj is a Python int object or a subclass.

voidPyLong_FreeExport(PyLongExport *export_long)¶

Release the export export_long created by PyLong_Export().

CPython 実装の詳細: Calling PyLong_FreeExport() is optional if export_long->digits is NULL.

PyLongWriter API¶

The PyLongWriter API can be used to import an integer.

Added in version 3.14.

structPyLongWriter¶

A Python int writer instance.

The instance must be destroyed by PyLongWriter_Finish() or PyLongWriter_Discard().

PyLongWriter *PyLongWriter_Create(intnegative, Py_ssize_t ndigits, void**digits)¶

Create a PyLongWriter.

On success, allocate *digits and return a writer. On error, set an exception and return NULL.

negative is 1 if the number is negative, or 0 otherwise.

ndigits is the number of digits in the digits array. It must be greater than 0.

digits must not be NULL.

After a successful call to this function, the caller should fill in the array of digits digits and then call PyLongWriter_Finish() to get a Python int. The layout of digits is described by PyLong_GetNativeLayout().

Digits must be in the range [0; (1 << bits_per_digit) - 1] (where the bits_per_digit is the number of bits per digit). Any unused most significant digits must be set to 0.

Alternately, call PyLongWriter_Discard() to destroy the writer instance without creating an int object.

PyObject *PyLongWriter_Finish(PyLongWriter *writer)¶

戻り値: 新しい参照。

Finish a PyLongWriter created by PyLongWriter_Create().

On success, return a Python int object. On error, set an exception and return NULL.

The function takes care of normalizing the digits and converts the object to a compact integer if needed.

The writer instance and the digits array are invalid after the call.

voidPyLongWriter_Discard(PyLongWriter *writer)¶

Discard a PyLongWriter created by PyLongWriter_Create().

If writer is NULL, no operation is performed.

The writer instance and the digits array are invalid after the call.