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.. highlightlang:: c
.. _floatobjects:
Floating Point Objects
----------------------
.. index:: object: floating point
.. ctype:: PyFloatObject
This subtype of :ctype:`PyObject` represents a Python floating point object.
.. cvar:: PyTypeObject PyFloat_Type
.. index:: single: FloatType (in modules types)
This instance of :ctype:`PyTypeObject` represents the Python floating point
type. This is the same object as ``float`` and ``types.FloatType``.
.. cfunction:: int PyFloat_Check(PyObject *p)
Return true if its argument is a :ctype:`PyFloatObject` or a subtype of
:ctype:`PyFloatObject`.
.. versionchanged:: 2.2
Allowed subtypes to be accepted.
.. cfunction:: int PyFloat_CheckExact(PyObject *p)
Return true if its argument is a :ctype:`PyFloatObject`, but not a subtype of
:ctype:`PyFloatObject`.
.. versionadded:: 2.2
.. cfunction:: PyObject* PyFloat_FromString(PyObject *str, char **pend)
Create a :ctype:`PyFloatObject` object based on the string value in *str*, or
*NULL* on failure. The *pend* argument is ignored. It remains only for
backward compatibility.
.. cfunction:: PyObject* PyFloat_FromDouble(double v)
Create a :ctype:`PyFloatObject` object from *v*, or *NULL* on failure.
.. cfunction:: double PyFloat_AsDouble(PyObject *pyfloat)
Return a C :ctype:`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.
.. cfunction:: double PyFloat_AS_DOUBLE(PyObject *pyfloat)
Return a C :ctype:`double` representation of the contents of *pyfloat*, but
without error checking.
.. cfunction:: 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`.
.. versionadded:: 2.6
.. cfunction:: double PyFloat_GetMax(void)
Return the maximum representable finite float *DBL_MAX* as C :ctype:`double`.
.. versionadded:: 2.6
.. cfunction:: double PyFloat_GetMin(void)
Return the minimum normalized positive float *DBL_MIN* as C :ctype:`double`.
.. versionadded:: 2.6
.. cfunction:: void PyFloat_CompactFreeList(size_t *bc, size_t *bf, size_t *sum)
Compact the float free list. *bc* is the number of allocated blocks before
blocks are freed, *bf* is the number of freed blocks and *sum* is the number
of remaining objects in the blocks.
.. versionadded:: 2.6
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