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_FromLongLong(PY_LONG_LONG v)
54 Return a new :ctype:`PyLongObject` object from a C :ctype:`long long`, or *NULL*
58 .. cfunction:: PyObject* PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG v)
60 Return a new :ctype:`PyLongObject` object from a C :ctype:`unsigned long long`,
64 .. cfunction:: PyObject* PyLong_FromDouble(double v)
66 Return a new :ctype:`PyLongObject` object from the integer part of *v*, or
70 .. cfunction:: PyObject* PyLong_FromString(char *str, char **pend, int base)
72 Return a new :ctype:`PyLongObject` based on the string value in *str*, which is
73 interpreted according to the radix in *base*. If *pend* is non-*NULL*,
74 ``*pend`` will point to the first character in *str* which follows the
75 representation of the number. If *base* is ``0``, the radix will be determined
76 based on the leading characters of *str*: if *str* starts with ``'0x'`` or
77 ``'0X'``, radix 16 will be used; if *str* starts with ``'0'``, radix 8 will be
78 used; otherwise radix 10 will be used. If *base* is not ``0``, it must be
79 between ``2`` and ``36``, inclusive. Leading spaces are ignored. If there are
80 no digits, :exc:`ValueError` will be raised.
83 .. cfunction:: PyObject* PyLong_FromUnicode(Py_UNICODE *u, Py_ssize_t length, int base)
85 Convert a sequence of Unicode digits to a Python long integer value. The first
86 parameter, *u*, points to the first character of the Unicode string, *length*
87 gives the number of characters, and *base* is the radix for the conversion. The
88 radix must be in the range [2, 36]; if it is out of range, :exc:`ValueError`
94 .. cfunction:: PyObject* PyLong_FromVoidPtr(void *p)
96 Create a Python integer or long integer from the pointer *p*. The pointer value
97 can be retrieved from the resulting value using :cfunc:`PyLong_AsVoidPtr`.
99 .. versionadded:: 1.5.2
101 .. versionchanged:: 2.5
102 If the integer is larger than LONG_MAX, a positive long integer is returned.
105 .. cfunction:: long PyLong_AsLong(PyObject *pylong)
109 single: OverflowError (built-in exception)
111 Return a C :ctype:`long` representation of the contents of *pylong*. If
112 *pylong* is greater than :const:`LONG_MAX`, an :exc:`OverflowError` is raised.
115 .. cfunction:: unsigned long PyLong_AsUnsignedLong(PyObject *pylong)
119 single: OverflowError (built-in exception)
121 Return a C :ctype:`unsigned long` representation of the contents of *pylong*.
122 If *pylong* is greater than :const:`ULONG_MAX`, an :exc:`OverflowError` is
126 .. cfunction:: PY_LONG_LONG PyLong_AsLongLong(PyObject *pylong)
128 Return a C :ctype:`long long` from a Python long integer. If *pylong* cannot be
129 represented as a :ctype:`long long`, an :exc:`OverflowError` will be raised.
131 .. versionadded:: 2.2
134 .. cfunction:: unsigned PY_LONG_LONG PyLong_AsUnsignedLongLong(PyObject *pylong)
136 Return a C :ctype:`unsigned long long` from a Python long integer. If *pylong*
137 cannot be represented as an :ctype:`unsigned long long`, an :exc:`OverflowError`
138 will be raised if the value is positive, or a :exc:`TypeError` will be raised if
139 the value is negative.
141 .. versionadded:: 2.2
144 .. cfunction:: unsigned long PyLong_AsUnsignedLongMask(PyObject *io)
146 Return a C :ctype:`unsigned long` from a Python long integer, without checking
149 .. versionadded:: 2.3
152 .. cfunction:: unsigned PY_LONG_LONG PyLong_AsUnsignedLongLongMask(PyObject *io)
154 Return a C :ctype:`unsigned long long` from a Python long integer, without
155 checking for overflow.
157 .. versionadded:: 2.3
160 .. cfunction:: double PyLong_AsDouble(PyObject *pylong)
162 Return a C :ctype:`double` representation of the contents of *pylong*. If
163 *pylong* cannot be approximately represented as a :ctype:`double`, an
164 :exc:`OverflowError` exception is raised and ``-1.0`` will be returned.
167 .. cfunction:: void* PyLong_AsVoidPtr(PyObject *pylong)
169 Convert a Python integer or long integer *pylong* to a C :ctype:`void` pointer.
170 If *pylong* cannot be converted, an :exc:`OverflowError` will be raised. This
171 is only assured to produce a usable :ctype:`void` pointer for values created
172 with :cfunc:`PyLong_FromVoidPtr`.
174 .. versionadded:: 1.5.2
176 .. versionchanged:: 2.5
177 For values outside 0..LONG_MAX, both signed and unsigned integers are accepted.