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python-3.7.4-docs-html/_sources/c-api/float.rst.txt

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+.. 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.