Long Integer Objects - Python 2.7.18 documentation 编辑
PyLongObjectThis subtype of
PyObjectrepresents a Python long integer object.
- PyTypeObject
PyLong_Type This instance of
PyTypeObjectrepresents the Python long integer type. This is the same object aslongandtypes.LongType.
- int
PyLong_Check(PyObject *p) Return true if its argument is a
PyLongObjector a subtype ofPyLongObject.Changed in version 2.2: Allowed subtypes to be accepted.
- int
PyLong_CheckExact(PyObject *p) Return true if its argument is a
PyLongObject, but not a subtype ofPyLongObject.New in version 2.2.
- PyObject*
PyLong_FromLong(long v) - Return value: New reference.
Return a new
PyLongObjectobject from v, or NULL on failure.
- PyObject*
PyLong_FromUnsignedLong(unsigned long v) - Return value: New reference.
Return a new
PyLongObjectobject from a Cunsigned long, or NULL on failure.
- PyObject*
PyLong_FromSsize_t(Py_ssize_t v) - Return value: New reference.
Return a new
PyLongObjectobject from a CPy_ssize_t, or NULL on failure.New in version 2.6.
- PyObject*
PyLong_FromSize_t(size_t v) - Return value: New reference.
Return a new
PyLongObjectobject from a Csize_t, or NULL on failure.New in version 2.6.
- PyObject*
PyLong_FromLongLong(PY_LONG_LONG v) - Return value: New reference.
Return a new
PyLongObjectobject from a Clong long, or NULL on failure.
- PyObject*
PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG v) - Return value: New reference.
Return a new
PyLongObjectobject from a Cunsigned long long, or NULL on failure.
- PyObject*
PyLong_FromDouble(double v) - Return value: New reference.
Return a new
PyLongObjectobject from the integer part of v, or NULL on failure.
- PyObject*
PyLong_FromString(char *str, char **pend, int base) - Return value: New reference.
Return a new
PyLongObjectbased 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 is0, the radix will be determined based on the leading characters of str: if str starts with'0x'or'0X', radix 16 will be used; if str starts with'0', radix 8 will be used; otherwise radix 10 will be used. If base is not0, it must be between2and36, inclusive. Leading spaces are ignored. If there are no digits,ValueErrorwill be raised.
- PyObject*
PyLong_FromUnicode(Py_UNICODE *u, Py_ssize_t length, int base) - Return value: New reference.
Convert a sequence of Unicode digits to a Python long integer value. The first parameter, u, points to the first character of the Unicode string, length gives the number of characters, and base is the radix for the conversion. The radix must be in the range [2, 36]; if it is out of range,
ValueErrorwill be raised.New in version 1.6.
Changed in version 2.5: This function used an
intfor length. This might require changes in your code for properly supporting 64-bit systems.
- PyObject*
PyLong_FromVoidPtr(void *p) - Return value: New reference.
Create a Python integer or long integer from the pointer p. The pointer value can be retrieved from the resulting value using
PyLong_AsVoidPtr().New in version 1.5.2.
Changed in version 2.5: If the integer is larger than LONG_MAX, a positive long integer is returned.
- long
PyLong_AsLong(PyObject *pylong) Return a C
longrepresentation of the contents of pylong. If pylong is greater thanLONG_MAX, anOverflowErroris raised and-1will be returned.
- long
PyLong_AsLongAndOverflow(PyObject *pylong, int *overflow) Return a C
longrepresentation of the contents of pylong. If pylong is greater thanLONG_MAXor less thanLONG_MIN, set *overflow to1or-1, respectively, and return-1; otherwise, set *overflow to0. If any other exception occurs (for example a TypeError or MemoryError), then-1will be returned and *overflow will be0.New in version 2.7.
- PY_LONG_LONG
PyLong_AsLongLongAndOverflow(PyObject *pylong, int *overflow) Return a C
long longrepresentation of the contents of pylong. If pylong is greater thanPY_LLONG_MAXor less thanPY_LLONG_MIN, set *overflow to1or-1, respectively, and return-1; otherwise, set *overflow to0. If any other exception occurs (for example a TypeError or MemoryError), then-1will be returned and *overflow will be0.New in version 2.7.
- Py_ssize_t
PyLong_AsSsize_t(PyObject *pylong) Return a C
Py_ssize_trepresentation of the contents of pylong. If pylong is greater thanPY_SSIZE_T_MAX, anOverflowErroris raised and-1will be returned.New in version 2.6.
- unsigned long
PyLong_AsUnsignedLong(PyObject *pylong) Return a C
unsigned longrepresentation of the contents of pylong. If pylong is greater thanULONG_MAX, anOverflowErroris raised.
- PY_LONG_LONG
PyLong_AsLongLong(PyObject *pylong) Return a C
long longfrom a Python long integer. If pylong cannot be represented as along long, anOverflowErroris raised and-1is returned.New in version 2.2.
- unsigned PY_LONG_LONG
PyLong_AsUnsignedLongLong(PyObject *pylong) Return a C
unsigned long longfrom a Python long integer. If pylong cannot be represented as anunsigned long long, anOverflowErroris raised and(unsigned long long)-1is returned.New in version 2.2.
Changed in version 2.7: A negative pylong now raises
OverflowError, notTypeError.
- unsigned long
PyLong_AsUnsignedLongMask(PyObject *io) Return a C
unsigned longfrom a Python long integer, without checking for overflow.Returns
(unsigned long)-1on error. UsePyErr_Occurred()to disambiguate.New in version 2.3.
- unsigned PY_LONG_LONG
PyLong_AsUnsignedLongLongMask(PyObject *io) Return a C
unsigned long longfrom a Python long integer, without checking for overflow.Returns
(unsigned PY_LONG_LONG)-1on error. UsePyErr_Occurred()to disambiguate.New in version 2.3.
- double
PyLong_AsDouble(PyObject *pylong) Return a C
doublerepresentation of the contents of pylong. If pylong cannot be approximately represented as adouble, anOverflowErrorexception is raised and-1.0will be returned.
- void*
PyLong_AsVoidPtr(PyObject *pylong) Convert a Python integer or long integer pylong to a C
voidpointer. If pylong cannot be converted, anOverflowErrorwill be raised. This is only assured to produce a usablevoidpointer for values created withPyLong_FromVoidPtr().New in version 1.5.2.
Changed in version 2.5: For values outside 0..LONG_MAX, both signed and unsigned integers are accepted.
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