8 .. index:: object: long integer
11 .. ctype:: PyLongObject
13 This subtype of :ctype:`PyObject` represents a Python long integer object.
16 .. cvar:: PyTypeObject PyLong_Type
18 .. index:: single: LongType (in modules types)
20 This instance of :ctype:`PyTypeObject` represents the Python long integer type.
21 This is the same object as ``long`` and ``types.LongType``.
24 .. cfunction:: int PyLong_Check(PyObject *p)
26 Return true if its argument is a :ctype:`PyLongObject` or a subtype of
27 :ctype:`PyLongObject`.
29 .. versionchanged:: 2.2
30 Allowed subtypes to be accepted.
33 .. cfunction:: int PyLong_CheckExact(PyObject *p)
35 Return true if its argument is a :ctype:`PyLongObject`, but not a subtype of
36 :ctype:`PyLongObject`.
41 .. cfunction:: PyObject* PyLong_FromLong(long v)
43 Return a new :ctype:`PyLongObject` object from *v*, or *NULL* on failure.
46 .. cfunction:: PyObject* PyLong_FromUnsignedLong(unsigned long v)
48 Return a new :ctype:`PyLongObject` object from a C :ctype:`unsigned long`, or
52 .. cfunction:: PyObject* PyLong_FromSsize_t(Py_ssize_t v)
54 Return a new :ctype:`PyLongObject` object from a C :ctype:`Py_ssize_t`, or
60 .. cfunction:: PyObject* PyLong_FromSize_t(size_t v)
62 Return a new :ctype:`PyLongObject` object from a C :ctype:`size_t`, or
68 .. cfunction:: PyObject* PyLong_FromLongLong(PY_LONG_LONG v)
70 Return a new :ctype:`PyLongObject` object from a C :ctype:`long long`, or *NULL*
74 .. cfunction:: PyObject* PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG v)
76 Return a new :ctype:`PyLongObject` object from a C :ctype:`unsigned long long`,
80 .. cfunction:: PyObject* PyLong_FromDouble(double v)
82 Return a new :ctype:`PyLongObject` object from the integer part of *v*, or
86 .. cfunction:: PyObject* PyLong_FromString(char *str, char **pend, int base)
88 Return a new :ctype:`PyLongObject` based on the string value in *str*, which is
89 interpreted according to the radix in *base*. If *pend* is non-*NULL*,
90 ``*pend`` will point to the first character in *str* which follows the
91 representation of the number. If *base* is ``0``, the radix will be determined
92 based on the leading characters of *str*: if *str* starts with ``'0x'`` or
93 ``'0X'``, radix 16 will be used; if *str* starts with ``'0'``, radix 8 will be
94 used; otherwise radix 10 will be used. If *base* is not ``0``, it must be
95 between ``2`` and ``36``, inclusive. Leading spaces are ignored. If there are
96 no digits, :exc:`ValueError` will be raised.
99 .. cfunction:: PyObject* PyLong_FromUnicode(Py_UNICODE *u, Py_ssize_t length, int base)
101 Convert a sequence of Unicode digits to a Python long integer value. The first
102 parameter, *u*, points to the first character of the Unicode string, *length*
103 gives the number of characters, and *base* is the radix for the conversion. The
104 radix must be in the range [2, 36]; if it is out of range, :exc:`ValueError`
107 .. versionadded:: 1.6
110 .. cfunction:: PyObject* PyLong_FromVoidPtr(void *p)
112 Create a Python integer or long integer from the pointer *p*. The pointer value
113 can be retrieved from the resulting value using :cfunc:`PyLong_AsVoidPtr`.
115 .. versionadded:: 1.5.2
117 .. versionchanged:: 2.5
118 If the integer is larger than LONG_MAX, a positive long integer is returned.
121 .. cfunction:: long PyLong_AsLong(PyObject *pylong)
125 single: OverflowError (built-in exception)
127 Return a C :ctype:`long` representation of the contents of *pylong*. If
128 *pylong* is greater than :const:`LONG_MAX`, an :exc:`OverflowError` is raised
129 and ``-1`` will be returned.
132 .. cfunction:: Py_ssize_t PyLong_AsSsize_t(PyObject *pylong)
135 single: PY_SSIZE_T_MAX
136 single: OverflowError (built-in exception)
138 Return a C :ctype:`Py_ssize_t` representation of the contents of *pylong*. If
139 *pylong* is greater than :const:`PY_SSIZE_T_MAX`, an :exc:`OverflowError` is raised
140 and ``-1`` will be returned.
142 .. versionadded:: 2.5
145 .. cfunction:: unsigned long PyLong_AsUnsignedLong(PyObject *pylong)
149 single: OverflowError (built-in exception)
151 Return a C :ctype:`unsigned long` representation of the contents of *pylong*.
152 If *pylong* is greater than :const:`ULONG_MAX`, an :exc:`OverflowError` is
156 .. cfunction:: PY_LONG_LONG PyLong_AsLongLong(PyObject *pylong)
158 Return a C :ctype:`long long` from a Python long integer. If *pylong* cannot be
159 represented as a :ctype:`long long`, an :exc:`OverflowError` will be raised.
161 .. versionadded:: 2.2
164 .. cfunction:: unsigned PY_LONG_LONG PyLong_AsUnsignedLongLong(PyObject *pylong)
166 Return a C :ctype:`unsigned long long` from a Python long integer. If *pylong*
167 cannot be represented as an :ctype:`unsigned long long`, an :exc:`OverflowError`
168 will be raised if the value is positive, or a :exc:`TypeError` will be raised if
169 the value is negative.
171 .. versionadded:: 2.2
174 .. cfunction:: unsigned long PyLong_AsUnsignedLongMask(PyObject *io)
176 Return a C :ctype:`unsigned long` from a Python long integer, without checking
179 .. versionadded:: 2.3
182 .. cfunction:: unsigned PY_LONG_LONG PyLong_AsUnsignedLongLongMask(PyObject *io)
184 Return a C :ctype:`unsigned long long` from a Python long integer, without
185 checking for overflow.
187 .. versionadded:: 2.3
190 .. cfunction:: double PyLong_AsDouble(PyObject *pylong)
192 Return a C :ctype:`double` representation of the contents of *pylong*. If
193 *pylong* cannot be approximately represented as a :ctype:`double`, an
194 :exc:`OverflowError` exception is raised and ``-1.0`` will be returned.
197 .. cfunction:: void* PyLong_AsVoidPtr(PyObject *pylong)
199 Convert a Python integer or long integer *pylong* to a C :ctype:`void` pointer.
200 If *pylong* cannot be converted, an :exc:`OverflowError` will be raised. This
201 is only assured to produce a usable :ctype:`void` pointer for values created
202 with :cfunc:`PyLong_FromVoidPtr`.
204 .. versionadded:: 1.5.2
206 .. versionchanged:: 2.5
207 For values outside 0..LONG_MAX, both signed and unsigned integers are accepted.