FM / c-api

/usr/share/doc/python3-docs/html/_sources/c-api/

/usr/share/doc/python3-docs/html/_sources/c-api

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abstract.rst.txt	715	0644	edit dl rm
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apiabiversion.rst.txt	2242	0644	edit dl rm
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Edit: /usr/share/doc/python3-docs/html/_sources/c-api/float.rst.txt (2243B)

.. highlightlang:: 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.
   This method returns ``-1.0`` upon failure, so one should call
   :c:func:`PyErr_Occurred` to check for errors.

.. 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.

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