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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 .. index:: single: FloatType (in modules types) This instance of :c:type:`PyTypeObject` represents the Python floating point type. This is the same object as ``float`` and ``types.FloatType``. .. c:function:: int PyFloat_Check(PyObject *p) Return true if its argument is a :c:type:`PyFloatObject` or a subtype of :c:type:`PyFloatObject`. .. versionchanged:: 2.2 Allowed subtypes to be accepted. .. 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`. .. versionadded:: 2.2 .. c:function:: PyObject* PyFloat_FromString(PyObject *str, char **pend) Create a :c:type:`PyFloatObject` object based on the string value in *str*, or *NULL* on failure. The *pend* argument is ignored. It remains only for backward compatibility. .. 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`. .. versionadded:: 2.6 .. c:function:: double PyFloat_GetMax() Return the maximum representable finite float *DBL_MAX* as C :c:type:`double`. .. versionadded:: 2.6 .. c:function:: double PyFloat_GetMin() Return the minimum normalized positive float *DBL_MIN* as C :c:type:`double`. .. versionadded:: 2.6 .. c:function:: int PyFloat_ClearFreeList() Clear the float free list. Return the number of items that could not be freed. .. versionadded:: 2.6 .. c:function:: void PyFloat_AsString(char *buf, PyFloatObject *v) Convert the argument *v* to a string, using the same rules as :func:`str`. The length of *buf* should be at least 100. This function is unsafe to call because it writes to a buffer whose length it does not know. .. deprecated:: 2.7 Use :func:`PyObject_Str` or :func:`PyOS_double_to_string` instead. .. c:function:: void PyFloat_AsReprString(char *buf, PyFloatObject *v) Same as PyFloat_AsString, except uses the same rules as :func:`repr`. The length of *buf* should be at least 100. This function is unsafe to call because it writes to a buffer whose length it does not know. .. deprecated:: 2.7 Use :func:`PyObject_Repr` or :func:`PyOS_double_to_string` instead.