blob: bfc28a79ecfdc7a4fe092aeec04c6fc053da82f3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
.. highlight:: c
.. _floatobjects:
Floating Point Objects
----------------------
.. index:: object: floating point
.. c:type:: PyFloatObject
This subtype of :c:type:`PyObject` represents a Python floating point object.
.. c:var:: PyTypeObject PyFloat_Type
This instance of :c:type:`PyTypeObject` represents the Python floating point
type. This is the same object as :class:`float` in the Python layer.
.. c:function:: int PyFloat_Check(PyObject *p)
Return true if its argument is a :c:type:`PyFloatObject` or a subtype of
:c:type:`PyFloatObject`.
.. c:function:: int PyFloat_CheckExact(PyObject *p)
Return true if its argument is a :c:type:`PyFloatObject`, but not a subtype of
:c:type:`PyFloatObject`.
.. c:function:: PyObject* PyFloat_FromString(PyObject *str)
Create a :c:type:`PyFloatObject` object based on the string value in *str*, or
``NULL`` on failure.
.. c:function:: PyObject* PyFloat_FromDouble(double v)
Create a :c:type:`PyFloatObject` object from *v*, or ``NULL`` on failure.
.. c:function:: double PyFloat_AsDouble(PyObject *pyfloat)
Return a C :c:type:`double` representation of the contents of *pyfloat*. If
*pyfloat* is not a Python floating point object but has a :meth:`__float__`
method, this method will first be called to convert *pyfloat* into a float.
If ``__float__()`` is not defined then it falls back to :meth:`__index__`.
This method returns ``-1.0`` upon failure, so one should call
:c:func:`PyErr_Occurred` to check for errors.
.. versionchanged:: 3.8
Use :meth:`__index__` if available.
.. c:function:: double PyFloat_AS_DOUBLE(PyObject *pyfloat)
Return a C :c:type:`double` representation of the contents of *pyfloat*, but
without error checking.
.. c:function:: PyObject* PyFloat_GetInfo(void)
Return a structseq instance which contains information about the
precision, minimum and maximum values of a float. It's a thin wrapper
around the header file :file:`float.h`.
.. c:function:: double PyFloat_GetMax()
Return the maximum representable finite float *DBL_MAX* as C :c:type:`double`.
.. c:function:: double PyFloat_GetMin()
Return the minimum normalized positive float *DBL_MIN* as C :c:type:`double`.
.. c:function:: int PyFloat_ClearFreeList()
Clear the float free list. Return the number of items that could not
be freed.
|
